Computer PCB

  • Longer Life Span of Computer PCB
  • Offer a Cost-effective Computer PCB
  • Providing 24/7 Services
  • ISO 9001 Certified

What Are The Different Form Factors Of A Computer PCB?

Computer PCBs are proceed in different sizes and dimensions with the compresence of their different aspects. This is named the form factor of the computer motherboard.
Since 2005, most of computers motherboards are taking the standard form factor of ATX computers PCB including Sun and Macintosh computers. That means the casing for the ATX motherboard will be matching the form of factormotherboard and the power supply.

What Are The Different Form Factors Of A Computer PCB?
How Can You Explain A Computer PCB CPU Socket?

What Are The Different Form Factors Of A Computer PCB?

A CPU socket is a linker that is used between the CPU and the computer boards. It only make sure that you way is correctly insert your CPU into the motherboard that does not get any type of issues.
You could see a locking system with the CPU socket so that the CPU unable moving while placed into the motherboard.

How Can You Explain A Computer PCB CPU Socket?

Besides the integrated and designing peripherals and parts, the computer motherboard also holds on other common components as belows:
1.Resistors
2.Transistors
3.Inductors
4.Transformers
5.Integrated circuits
6.Temperature, distance, and light sensor

Besides the integrated and designing peripherals and parts, the computer motherboard also holds on other common components as belows: 1.Resistors 2.Transistors 3.Inductors 4.Transformers 5.Integrated circuits 6.Temperature, distance, and light sensor 7.Diodes 8.Capacitors 9.LEDs

Your Trusted Computer PCB Supplier

 computer PCB

Venture is a famous manufacturer and supplier of a computer PCB in China. We provide a high-end computer PCB for our valuable customers. Venture computer PCB is one of the most in-demand products on the market due to its unique features.

The main purpose of computer PCB is to support the other electronic components of computers.  So whether you are in need of computer PCB for your business and for personal use, you can always check on Venture.

We have a wide range of PCBs to offer that are suitable in various applications like keyboard PCB, driver PCB, automotive PCB, load board PCB, headphone amp PCB and many more. You can assure that you can get the most outstanding products from Venture.

Your Leading Computer PCB Manufacturer in China

Venture is an absolute computer PCB fabricator and manufacturer in China for many years. We provide a one-stop solution for your computer PCB’s need on time. All of our computer PCBs products come with the best features.

computer PCB

Venture computer PCB offers a wide range of advantages and benefits. Venture computer PCB can truly give the best performance on your computer units. If you want to make sure that your computer has a long-lasting life, you can use the Venture computer PCB. This PCB offers the following advantages:

  • Longer lifespan than other computer PCB.
  • Give the stability performance of your computers.
  • Cheaper than other Computer PCB.
  • Excellently support other components.

computer PCB

For us, your requirement and inquiries are our priority. If you handle a business which is related to PCBs products, Venture is the right place to have the most affordable and outstanding computer PCB. Aside from computer PCB, we manufacture a variety of PCB products that will fulfil all of the project requirements.

At Venture, we have a computer PCB with different sizes, features and styles. You are able to choose the most suitable for your applications. We provide the most durable computer PCB for your sake. We truly care about what you use, that’s why we always fabricate the best kind of computer PCB.

computer PCB

Venture is an ISO 9001, SGS, and CE certified fabricator. We are willing to supply and customize the most preferred computer PCB for you. Due to our experience and knowledge, our computer PCB and other PCB products can be shipped worldwide.

Venture always here to provide you a turnkey and one-stop solution for all PCB products especially when it comes to computer PCB. The venture is your great PCB products supplier and manufacturer in China.

Please do not hesitate to send us your inquiries, we will send you back immediately all the details you need!

Computer PCB: The Ultimate FAQs Guide

Computer-PCB-The-Ultimate-FAQs-Guide

The type of PCB utilized in computers is complex, multilayer, HDI PCB design, which are employed in both laptop and desktop computers.

Computer PCBs act as the base for most internal computer components like network interface cards, controller cards, expansion cards, and video cards.

Let’s dive right in.

Is There Difference Between Computer Motherboard And Computer PCB?

No, computer motherboard is one of the many types of computer printed circuit board.

Motherboard is the largest computer PCB that all other circuit boards and gadgets link to and communicate with one another.

Essentially, the motherboard offers connectivity between the computer hardware components, such as the processor (CPU), hard drive, memory (RAM), and video card.

There are various types of motherboards, engineered to fit various sizes and types of computers.

Each type of computer motherboard is made for distinct types of memory and processor.

For that matter, they are not compatible with all processor and memory type.

Nonetheless, hard drives are usually universal and compatible with most motherboards, irrespective of the brand or type.

Computer Motherboard PCB

Computer Motherboard PCB

Which Are The Various Types Of Computer PCB?

There are many types of PCBs used in both desktop and laptop computers.

They find use in the internal components of computer like memories, controller cards, expansion cards, video cards, and network interface cards.

All the computer components link to the motherboard, which is the main computer PCB.

Generally, you can classify computer circuit boards as:

Single-Sided Computer PCBs

Single-sided PCBs features only one substrate layer, which is typically covered using a thin copper layer on one side.

They are utilized for simple computer components like mouse, and are affordable to produce in mass compared to other computer PCB types.

Double-Sided Computer PCBs

Similar to single-sided circuit boards, double-sided PCBs also feature only one substrate layer. However, both sides have conductive metal cover and computer PCB components.

Multilayer Computer PCBs

Multilayer computer PCBs have multiple substrate layers, and feature insulating materials isolating the layers.

These types of computer PCB expand the technology applied in double-sided types.

The multilayer circuit boards are compact-sized and give benefits of space and weight. They are often used in special and complex computer components.

Rigid Computer PCBs

These refer to those computer PCB types whose substrate is fabricated using a solid material that you cannot bend.

Most types of computer circuit boards are rigid in nature, which makes them compact, which facilitates development of a myriad of sophisticated circuits.

Flexible Computer PCBs

Flexible computer PCBs are fabricated using flexible substrate material. They come in multilayer, double-sided, and single-sided configurations, which is essential in minimizing complexity in the computer PCB assembly.

Rigid-Flex Computer PCBs

Rigid-flex computer circuit boards are a blend of rigid and flexible PCBs.

The incorporate several flexible circuitry layers joined to more than a single rigid printed circuit board. Because of their lightweight, rigid-flex PCB gives 60 percent space and weight savings.

Let’s now look at some of the function-specific types of computer PCB, which include the following:

Double Data Rate Synchronous dynamic RAM (DDR SDRAM) module are the conventional RAM types applied in most modern computers.

Hard Drive PCB

Also known as HDD PCB, hard drive PCB facilitates the transfer electric current between different components, enabling functioning of the hard drive. Basically, the board “instructs” the computer hard drive on how to function.

It processes pulses from the computer system and enables the drive to send information to the CPU. Nonetheless, hard drive PCB is not the main user data storage space, and it lacks any mechanical components.

Keyboard PCB

Keyboard PCB is the heart of computer keyboard. It refers to a printed circuit board on which you mount the mechanical switches and all other keyboard components.

Mechanical keyboard PCB requires no soldering and you can replace or customize any of the switches.

RAM PCB

Computers will require some form of memory to process data.

RAM PCB refers to a semiconductor memory type that is usually utilized for program code or data required by computer microprocessor to function.

DRAM PCB

DRAM PCB

LED PCB

LED printed circuit boards power various displays and indicators on desktop and laptop computers.  Consumer electronics like computers are heat-sensitive, therefore, aluminum LED PCBs are ideal because of their capability to transfer heat.

Microcontroller PCB

Microcontroller PCB is a programmable circuit board whose function is to control others components of the computer PCB.

Typically, it regulates the other devices via a microprocessor, memory and other peripherals.

Power Supply PCB

Power supply PCB is important in power regulation in any computer device.

It essentially functions as a converter that changes the input power supply into an output that meets the computer requirements.

Computers need power supply PCB to help in AC to DC conversion with minimized noise.

Battery Charger PCB

A battery charger circuit board, specifically used in laptops, protects the battery against overcharging, over-draining, or overheating. By ensuring this, it guards the laptop battery from damage, explosion and fire.

Bluetooth PCB

Bluetooth PCB facilitates wireless exchange and sharing of information between the computer and other digital devices. This circuit board features an antenna that receives the signal relayed from a Bluetooth device.

The Bluetooth PCB then processes the signal and sends the message to the output. It operates in the 2.4 GHz frequency and has a 1cm to 100m range.

Which Are The Main Components Of Computer Motherboard?

The motherboard carries all the primary components of computer including:

Central Processing Unit (CPU)

The CPU, also referred to as microprocessor, is the computer’s brain.

Also known as the microprocessor or the processor, the CPU is the computer’s brain. Its function is to fetch, decode, and implement program instructions together with completing logical and mathematical calculations.

Math Coprocessor

This is a microprocessor type which is optimized to perform complex mathematical calculations, such as irrational arrays and numbers.

Main Memory (RAM)

Random Access Memory is computer chip that momentarily saves dynamic data to boost computer performance whilst you are using it.

Basic Input Output System (BIOS)

BIOS refers to a “read-only” memory that comprises of low-level software that controls the computer hardware. It functions as a connection between the hardware and operating system.

The BIOS has all the code necessary to control the display screen, keyboard, serial communications, disk drives, and several miscellaneous functions.

Complementary Metal Oxide Semiconductor (CMOS)

CMOS refers to a small independent block of memory manufactured using CMOS RAM chips, which stores information regarding the BIOS settings.

It is maintained running by CMOS battery even if the computer is off, preventing reconfiguration if you switch the computer on.

Cache Memory

Cache memory represents a small high-speed memory (RAM) block that boosts the computer performance. It does this through pre-loading data from the comparatively slow) primary memory and conveying it to the microprocessor on demand.

Expansion Buses

Expansion bus describes an input/output path from the microprocessor to peripheral devices, which facilitates computer expansion using an expansion board. Buses deliver signals like memory addresses, data, control and power signals from one component to another.

The expansion buses allow you to improve the computer abilities by incorporating missing features through adapter cards that you insert in expansion slots.

Chipset

A chipset designates a range of small circuitries that coordinate instructions and data flow between the CPU and external components.

It equally controls flow of data in and out of hard disks, and extra components linked to IDE channels.

Generally, there are two main components of computer chipset:

  1. The NorthBridge that controls the transfers between the CPU and RAM, and is positioned close to the processor.
  2. The SouthBridgethat manages interactions between peripheral devices.

CPU Clock

The CPU clock is instrumental in synchronization of all the computer PCB components and gives the primary timing signal for the microprocessor.

It is an internal timing gadget that gives life to the CPU by supplying it a continuous flow of pulses.

Jumper Pins

These are small projecting pins on the computer motherboard. You use a jumper bridge or cap to couple or short a set of jumper pins.

If the bridge is linked to any of the 2 pins through a shorting connection, it completes the circuitry. This allows you to achieve a certain configuration.

Jumper Caps

Jumper caps refer to metal bridges that shut an electrical circuitry. Normally, a jumper comprises of plastic plug that fixes over a set of protruding pins.

They are at times used in expansion boards configuration. You can modify the board’s setting by fitting a jumper plug above a different group of pins.

3-Pin System Fan Connectors

These pins help in connecting the system fan, also referred to as case fan. The system fan is essential in bringing in cool air and driving hot air out of the system, hence cooling computer PCB components.

Heat Sink

Heat sink describes a device comprising of aluminum finned radiator employed in absorbing unwanted or excess heat from some components of computer motherboard.

SATA Connectors

This is the point of connection for mass storage gadgets like solid-state drives, optical drives, and hard disk drives.

24-Pin ATX Power Supply Connector

This the point where you link the ATX power supply to the motherboard. The matching connector features a tiny clip at the top that clicks to clutch the connector in position.

To ensure you make the connection in one direction, the power supply connector is keyed.

Super IO Chip

This controller type manages the less prominent and slower input/output components like serial port UART, real-time clock, parallel port, and game port

Computer Motherboard

Computer Motherboard

Which Are The Types Of IC Packages Used In Computer PCB?

The common types of IC package that find use in computer PCBs include:

  • Ball Grid Array (BGA)
  • Quad Flat Non-leaded Package (QFN)
  • Single In-line Package (SIP)
  • Zigzag In-line Package (ZIP)
  • Quad Flat Package (QFP)
  • Quadruple In-line Package (QIP)
  • Ceramic Flat Pack (CFP)
  • Dual In-line Package (DIP)

What Are The Common Computer Motherboard Form Factor?

In computer PCB, the form factor describes the specification of the motherboard.

It gives information on its dimensions, general shape, physical organization (motherboard layout), type of power supply mounting holes location among other specifications.

Some of the common computer motherboard form factor include:

  • ATX
  • Baby AT
  • AT
  • Full ATX
  • MicroATX
  • Full AT
  • NLX
  • LPX
  • Mini LPX
  • DTX
  • BTX

Why Should You Choose HDI Computer PCB?

HDI technology enables designers to install small computer PCB components near each other.

Smaller board sizes, fewer layers and increased packaging density results in a cascaded impact for computer circuit board design. Let’s look deeper into that effect.

Raising the packaging density enables you to shorten the conductive pathways between components. HDI technology allows to increase the routing channels number on the inner computer PCB layers.

Consequently, this reduces the number of total layers needed for the design.

Decreasing the layers number puts more connections on one board and enhances component placement, connections and routing.

This allows you to focus on Every layer Interconnection (ELIC) technique.

ELIC enables shift from thicker to thinner, flexible computer PCB that maintain strength whilst facilitating the functionality density observed with HDI.

Moreover, HDI circuit boards depend on laser instead of mechanical drilling.

As a result, an HDI computer PCB design features smaller aperture and pad sizes.

Reducing the aperture enables you to increase the board area layout.

Furthermore, lessening the electrical pathways and attaining denser trace routing boosts the board’s signal integrity and fastens signal processing.

You gain an extra benefit with the density by cutting the possibility of capacitance and inductance issues.

Instead of using thru-holes, HDI computer PCB design employs buried vias and blind vias.

Staggering and accurately positioning blind and buried vias decrease mechanical stress and hinders any chances for warping.

Additionally, you can employ stacked vias to reinforce interconnection points and boost reliability. Using via-in-pad equally reduces signal loss by minimizing crossing delays and alleviating parasitics.

HDI Computer PCB Assembly

HDI Computer PCB Assembly

What Is The Advantage Of Applying ELIC Technology In Designing HDI Computer PCB?

Designing HDI computer PCB applying ELIC technologies allows you to fabricate more advanced circuit boards incorporating multilayer stacked copper-filled in-pad microvias.

Due to ELIC, the computer circuit board design can benefit from dense, sophisticated interconnections required for high-speed circuits.

Since the interconnections utilize stacked copper-filled microvias, ELIC technology allows you to place connections between any 2 layers without eroding the board.

Does The Component Selection Influence The HDI Computer PCB Layout Design?

Designing an HDI computer PCB should also pay attention on the accurate layout of high-density board components.

The choice of components impacts trace width, position, drill hole, and stackup sizes.

For instance, HDI computer PCB designs usually incorporate fine-pitched Ball Grid Arrays and BGAs that require pin escapes.

When including these devices, it is important to understand parameters that impair signal and power integrity coupled with the board’s physical integrity.

Those parameters include attaining suitable isolation between bottom and top layers to control EMI and minimize mutual crosstalk between inner signal layers.

Also, ensuring symmetrical spacing of components will assist in avoiding unbalanced stress on the computer PCB.

What Are The Tips To Ensure Efficient Component Placement Layout In Computer PCB?

Here are some of the guidelines that you should follow to ensure that the components of computer PCB are placed effectively:

Categorize Components By Function

Ensure that you group the components based on their functional block within the circuitry.

For instance, do not mix up power management components with analog parts, and keep high-speed digital communication component on its own.

Plan on where to locate these components on the computer PCB. The general is to keep clear the noisiest signals from the extremely sensitive one.

Moreover, by categorizing components based on their function, you will have better management of their return pathway.

Mount Parts Far From Heat Dissipating Region

The voltage regulator warm up considerably in power-intensive applications. In power-demanding applications, the voltage regulator heats up significantly.

You may have incorporated heat dissipating vias to boost the rate of heat dissipation.

Nonetheless, it is not advisable to locate other components close to the regulator. It is the same case if you are employing op-amp or any other heat emitting gadget.

Locate Board-To-Wire Connectors Close To The Boundary

It is advisable to position the board-to-wire connectors close to the margin of the computer PCB, particularly when the wire should be screwed.

Keeping connectors near the boundary not only appear organized, it also avoids unnecessary contact with other PCB parts.

Standardize The Components Orientation

Irrespective of their footprint, all computer printed circuit board ICs feature a pin 1 marker. You should make sure that their alignment is in one direction.

The improves the minimizes placement errors and improves efficiency of PCB assembly process.

Make Space For Conducting Copper Traces

During computer PCB components placement, make sure you leave adequate space for copper tracks to pass through.

This is especially important close to components having hundreds of pins.

Which Are The Assembly Methods Used In Component PCB Component Mounting?

There are two main component mounting techniques applied in computer PCB fabrication:

Thru-Hole Mounting

With thru-hole mounting operation, you insert the component leads in holes bored into a bare computer circuit board.

Through hole technology produces a firmer connection in comparison to surface mount technology, making it suitable for applications requiring high reliability.

The stronger connection is because the component leads go all the way across the PCB. This is different from surface mounting where you attach the components through soldering them on the board surface.

Thru-hole technology is equally essential for testing and computer PCB prototyping process that needs manual components adjustments.

Surface Mounting

With surface mounting technique, you install parts directly to the surface of PCB utilizing solder. It is the most often applied method of mounting PCB components.

Instead of through holes, surface mount technology employs vias to link the various computer PCB layers.

SMT allows you to install components on both board sides.

Moreover, the surface mounted parts can as well be smaller, making it possible for more components to fit on one circuit board.

In turn, this lowers computer PCB cost and has facilitated the miniaturization of computer devices.

Besides, you can also complete surface mounting rapidly and is barely involving compared to through hole mounting, further decreasing costs.

 Surface Mounted Components of Computer PCB

Surface Mounted Components of Computer PCB

What Are The Possible Problems Related To Incorrect Pad Sizes In Computer PCB?

The position, size and shape of a pad within computer PCB footprint directly relates to how effectively the board can be fabricated.

Using an out of position or incorrectly sized pad can lead to several issues during the soldering operation.

Let’s look at some of the likely problems due to incorrect sizing or position of pads:

Floating Parts

When SMT component is lying on pads which are spaced incorrectly or excessively large, it might float out of location during solder reflow.

The result may be bridging of solder over to surrounding metal, and inadequate part spacing for thermal cooling down, rework and board test.

Incomplete Solder Joints

Pads that are spaced very closely or are too small might not permit sufficient room for formation of adequate solder fillet. This can lead to poor solder joint or none completely.

Solder Bridging

As we have already stated, surface pads which are excessively can make the computer PCB component to float, causing solder bridging.

In this scenario, the solder extends across a metal feature or pad on adjacent net and causes a direct short.

Solder bridging may also occur when the right solder paste and solder mask features are not created to pad shape within CAD tools.

Tombstoning

When there is thermal imbalance in an individual surface mount component, one pad may have its solder paste melt quicker than the other.

This will in turn pull the component up in an upright or, “tombstone” position.

This normally arises because of connecting one pad to a big metal plane that serves as heat sink. Nevertheless, it can equally occur when you use irregular pad sizes between the 2 pins.

Solder Wicking

Thru-hole pads can also have issues if they are constructed improperly.

When you employ excessively large drill size for the part lead, the solder might wick down via the hole before forming proper connection.

On the contrary, a very small drill size will cause difficulty in inserting the lead, thus slowing down the computer PCB assembly process.

Drill Breakout

The drill can wander a bit during the usual drilling process and make the pad shape to break out. This often happen when the pad size is very tiny for drill hole you are using.

Moreover, excessively large pads will occupy real estate on your board that might be necessary in computer PCB designs having dense component placements.

For that matter, you should use the right pad shapes and sizes in your circuit board footprints.

Which Is Better To Use Between SDRAM Vs DDR RAM In Computer PCB?

Synchronous Dynamic RAM (SDRAM) are the standard RAM module type applied in modern computers.

When comparing SDRAM vs. DDR RAM, you should bear in mind that DDR RAM is version of SDRAM.

In the table below, we are comparing the fundamental operating specifications of DDR RAM vs. SDRAM.

Table Comparing SDRAM vs DDR RAM Modules

Table Comparing SDRAM vs DDR RAM Modules

From the table, you can observe that the 2 types of computer PCB memories have matching abilities, excluding capacity and clock rate.

Generally, DDR RAMs are much faster compared to SDRAMs. This is because DDR RAM transmits 2 times data for every clock cycle and its higher clock rate.

However, both RAM types feature a synchronous interface, implying they employ source synchronous clock for triggering transfer of data from the memory.

Why Is Via Tenting Important In Multilayer Computer PCB?

Via tenting decreases the number of bare conductive pads on the PCB surface.

Having the tents minimizes the solder bridging possibility, which can happen during the computer PCB assembly operation.

Consequently, via tenting stops the flow of solder into the PCB via and onto opposite of the board during wave soldering.

The process also minimizes migration of paste from SMT pads and is particularly essential when you locate a series of pads near vias.

The via tenting process is ideal for smaller diameter vias, with 12 mil or less diameter. Specifically, via tenting works perfectly for vias that very close to pads.

Nevertheless, you can as well encounter issues with computer PCB via tenting.

In certain cases, wet PCB processing allow PCB cleaning solutions or surface finish to get clogged in the via following full tenting.

Accordingly, the liquid may vaporize and lead to breaking of the via during any heating operation or may erode the copper plating.

You can avoid this issue by using a pinhole in the middle of the solder mask, which enables the liquid to clear out.

In other situations, the liquid solder mask doesn’t cover a via with diameter greater than 12 mil. This leaves a gap for flux and any other chemicals that may corrode the via.

Some computer PCB fabricators prefer plating the inner surface of bare larger vias on the circuit board surface. The plating guards the copper from disintegration.

Nonetheless, molten solder may flow through the holes when performing wave soldering and form solder splashes and solder balls.

What Are The Methods Of Via Tenting Used In Multilayer Computer PCB?

Vias link multiple layers of printed circuit board to each other and make sure there is electrical continuity.

For computer PCB, via tenting implies that the solder mask coats the pad, and go into the hole without totally sealing the hole.

It should prevent scratches, solder bridging, or oxidation from destroying the copper layers of the circuit board.

The common via tenting techniques used in multilayer computer PCB include:

Full Via Tenting

Here, the solder mask forms a physical bar on both edges of the printed circuit board by coating the via and annular ring.

Partial Via Tenting

In this via tenting method, the hole is left exposed but the solder mask coats the annular ring.

When your computer PCB design needs heat dissipation within a specific section or entails high current traces, partial tenting facilitates minimal hole-to-hole clearance.

Single Side Tenting

Here, the solder mask coats the via and annular ring although only on the component surface of the computer PCB.

You may opt to apply single side via tenting method for surface mounted components.

What Are The Key Requirements That You Should Meet When Designing Power Distribution Network Of Computer PCB?

You should strike to meet the following requirements during the designing of power distribution network:

Minimized PDN Impedance

There will be some impedance after constructing the ground and power planes and distributing current to components of computer PCB assembly.

Low PDN impedance designing entails avoiding ringing when the circuit board components draw electrical current.

Low Resistance in Ground/Power Pathway

Make sure that the route current in the power distribution network follows is a low resistance pathway.

The aim is to make sure that there is no power dissipation in the form of heat (no IR drop) in the computer PCB system.

Current Draw Falls Within Supply Limits

Power supply board and components are not perfect, and current should be spread throughout the computer PCB to reach every component.

Your overall current draw should not surpass the maximal supply current from the power block. Similarly, the computer power supply requires the correct input current so as to deliver the rated output.

How Should You Route Fine-Pitch Devices In Computer PCB?

One section of the computer PCB that will have many vias is about parts with high pin count, specifically BGA components.

With the need to route hundreds/thousands of pins from these components into the PCB, you will quickly use the space on the board.

It is essential to come up with a plan for these escape paths so as to route the fine-pitch devices successfully.

Let’s look at some tips of routing fine-pitch components of computer PCB:

  • Design your component placement about these parts having routing in mount, beginning with mounting decoupling capacitors.

Parts with high pin count depend on numerous capacitors to counterbalance their power integrity. But you will not have adequate space for them after completing the routing.

Subsequently, mount the remaining parts that the fine-pitch device will link to depending on their signal pathways.

Remember to also maintain adequate space for vias and routing channels when mounting these components.

  • Design escape via placement precisely allowing for sufficient routing channels below the part. Typically, this begins by routing the exterior rows of pins in diagonal arrangements away from the device.

Subsequently, route out away from pins to vias which are directly close to the high pin count device in a dog-bone arrangement.

Alternatively, you can route the pins towards the inside when the BGA has an open space at the center.

BGA Computer PCB Component

BGA Computer PCB Component

  • For bigger BGAs, utilize vias inside the BGA pads to save space. Make sure you confirm first with your computer PCB manufacturer whether they can fabricate the circuit having the vias in pads.

You will need to employ microvias in pads and/or microvias for BGAs having smaller pin pitches and/or higher pin counts.

You cannot avoid having many holes in the PCB because of the numerous nets you should route from the high pin count components.

The secret is planning the design before beginning placing and routing parts so as to have the space necessary to have everything in.

Which Are The Routing Methods For Routing DDR Circuits In Computer PCB?

There are 2 different methodologies commonly applied in routing DDR circuits of computer PCB:

T-Topology Routing

This technique routes the clock, address, and command signals from the controller to RAM PCB in a branch manner.

On the other hand, it connects the data lines directly.

It was challenging to route the branching, though the advantage of T-topology routing was its capability to manage multi-die packages’ higher capacitance loads.

The technique was initially used for DDR2 however, it could not manage the higher DDR3 and DDR4 signaling rates.

Fly-By Topology Routing

This DDR routing method routes the clock, address and command signals in a chain out of the controller to RAM module.

Similarly, it also links the data lines directly.

Fly-by topology routing supports higher frequency processes by minimizing trace stubs amounts from T-topology that equally enhances its signal integrity.

Moreover, it is easier to route the daisy chain arrangement of fly-by topology compared to branching arrangement of T-topology.

What Are The Key Challenges To Attaining Good Power Integrity In Computer PCB?

Power integrity of computer PCB is related to some issues with its power delivery network, which include:

Ground Bounce

Also referred to as simultaneous switching noise (SSN), ground bounce happens if several signals switch at similar time.

This may occur when the computer PCB microprocessor writes to memory, and all the data signals switch at corresponding time.

When the signals do not revert to their source ground level because of switching speed, they “bounce” over it. This noise due to ground bounce noise may lead to false switching and possibly interrupt or switch off the computer.

Power Ripples

The switching attributes of the power supply of computer PCB can result in power ripples. Consequently, the ripples might lead to crosstalk in adjoining circuits compromising the signals accuracy, which can cause circuits disruption.

Electromagnetic Interference (EMI)

How you arrange the power planes in the computer PCB layer stackup can result in EMI issues if you do not configure properly.

The ground and power planes can aid in preventing EMI from influencing the signal layers performance by protecting them.

However, this is only happens when the signal layers placed between the planes.

Return Paths

The design of computer circuit board planes should maintain the right signal return paths.

Regrettably, the power requirements usually leave too many holes for interconnecting vias together with stitching vias.

Additionally, several power supplies may force you to have split planes.

All these can jeopardize a good signal return path, which may result in poor signal integrity.

You must consider all these concerns together with evaluation of the computer PCB for better power integrity.

Most of the issues highlighted above can be resolved through strategically positioned resistors and capacitors coupled with precisely placed power planes.

How Can You Cut Computer PCB Assembly Cost?

The cost of computer PCB assembly is normally affected by the quantity of components, complexity, and type of the assembly operation.

Whilst the assembly process is not within your control, you can apply the following strategies to ensure a cost-saving computer PCB assembly:

Put Surface Mount Components On One Side

Generally, assembling computer circuit board having surface mounted components on either side is costlier compared to one having then on one side.

This is because the board will only need one cycle of pick-n-place rather than twice, cutting cost on stencil.

Proper labelling of Designator

Designators help in easy identification of components on the computer circuit board.

You need to ensure they are clear and positioned near the parts they are related to.

It assists your computer PCB manufacturer to ensure operation free of challenges and also reduces problems in manual placement.

Panelize The PCB

It is advisable to produce the board in panels when you are fabricating many PCBs.

This decreases the manufacturing cost in addition to increasing assembly process efficiency.

You should make sure that there are fiducial markers in the computer PCB panels to guarantee orientation and precision in pick and place operation.

 Panelized Computer PCB

Panelized Computer PCB

Give Complete BOM List

Furnishing your computer PCB manufacturer with a complete Bill of Material list helps them in placing the parts on the right footprint.

BOM list equally aids you in planning and budgeting for purchase by taking advantage of quantity and use.

For all your computer PCBs, contact Venture Electronics now.

Scroll to Top