Custom PCB Assembly

  • 8 to 48 Hours Delivery Time When Components are Ready
  • More Than 10 Years of Experience
  • Changing Dimensions
  • Competitive Price

How to Choose a Custom Printed Circuit Board Assembly Service?

A quality custom PCB assembly service can be meet your demands quickly and efficiently.
Consumer electronics are verify a growing requrement for products that could be customized to meet individual demands and tastes.

This could be finished through fully custom products built from the ground up – like a computer – or via semi-custom products that provide interchangeable features and components for mass-produced items.

Digital cameras are an example of semi-custom products as they could be revised with new software or hardware. To support these new functions,the manufacturer needs to create a custom PCB with a flexible design.

How to Choose a Custom Printed Circuit Board Assembly Service
What to Expect from a Custom Printed Circuit Board Assembly Service

What to Expect from a Custom Printed Circuit Board Assembly Service?

Certifications to verify they are in compliance with regulatory and industry standards. At Venture, we are fully compliant with IPC-610 standards and has pride in ourselves on our long history of quality and excellence.

A verified supply chain so that they could be source quality components at competitive prices. Overseas manufacturing is always plagued by counterfeit components, leading in more and more companies to bring their manufacturing back to the States.

Venture Electronics custom PCB assembly capabilities

Assembly types we provide include: surface mount PCB assembly, through-hole PCB assembly, PCB board assembly, mixed technology and single or double-sided placement.

We could process components supplied by you as well as components purchased for you. If you would like to assemble particular components by yourself – noticed this in the corresponding bill of material (BoM) for your project. We do request that components you supply be dry and adequately labelled with the component designations used on your BoM.

Our custom PCB assembly capabilities

Custom PCB Assembly

If you are looking for a customizing PCB assembly manufacturer and partner, Venture is your best choice. Venture is a main custom PCB assembly manufacturer in China for more than 10 years.

With the use of our advanced technology, we can fabricate, design, and customize the PCB assembly. Venture can do custom to meet your project requirement.

We are capable of manufacturing the highest quality custom PCB assembly. Also, we utilize durable and quality raw materials with our expert engineers.

If you have upcoming projects with regards to PCB or customizing, this is your right place. Venture can provide you an excellent quality product.

Your Leading Custom PCB Assembly Supplier in China

Custom PCB Assembly

Venture has a wide selection for customizing PCB assembly and provides high-quality custom PVC assembly. It includes changing PCB dimensions, weight requirements, and more customized manufacturing processes like wire and die bonding. For more than 10 years, Venture can custom and meet every customer’s requirements. Also, Venture is a leading manufacturer and supplier that provide a complete solution for your needs.

The custom PCB assembly has a minimum size of 80 mm x 55 mm. Venture can produce smaller PCB like 5 mm x 5 mm. Also, if you want a bigger size, Venture has a great solution for that. Since this is custom PCB assembly, we can produce bigger sizes. The maximum sizes will range 600 mm x 250 mm and this include panel border. At Venture, the custom PCB assembly has a surface mount of maximum 26000 components per hour.

Custom PCB Assembly

Venture has well-trained engineers to assist and meet your specifications. As professionals, we have types of custom PCB assembly but it will depend on your specific specifications. At Venture, you assured us to get outstanding services, custom and designing, shipping, and production. Venture will provide you a custom PCB assembly that is durable, functional, and longevity.

Venture is an ISO 9001, CE, and SGS certified. Our manufacturing factory is in Shenzhen China. We have a delivery time of 8 to 48 hours when the components are ready. Whenever you need a custom PCB assembly, Venture is your best solution. We can always satisfy your needs at a competitive price. At Venture, you can free to contact us and we are glad to respond to you in your inquiries about custom PCB assembly.

Contact us now for your next Custom PCB assembly orders!

Custom PCB Assembly: The Ultimate FAQ Guide


With the right information, you will find custom PCB assembly really profitable.

A reason this guide will explore all the fundamental aspects of custom printed circuit board assembly process.

Let’s dive right in.

What Is Custom PCB Assembly?

A custom PCB assembly is an electronic circuit featuring special components and conductive metal strips you employ for a specific application.

A custom PCB assembly allows you to meet the exact needs of your electrical design despite the complexity saving on space.

Fig 1 - A Custom PCB Assembly

A Custom PCB Assembly

What Are The Benefits Of Custom PCB Assembly?

Employing a custom PCB assembly affords you the following advantages:

  • You save on much needed board space by shrinking your circuitry.
  • Employing a custom PCB assembly reduces the cost of labour through automation thus enhancing reliability.
  • When making a custom PCB assembly, you do not requires decals.
  • You can easily verify functionality in custom PCB assembly.
  • Custom PCB assembly reduces the production lead times thereby accelerating product development.
  • When you undertake custom PCB assembly, you have direct control over the product quality.

What Board Types Can You Us In Custom PCB Assembly?

PCB assembly is specific to the manufacturing process employed, the board design and area of application.

Additionally, you consider aspects such as the space requirements, stress capability and stability.

With custom PCB assembly, you can furnish different board types such as:

Single-Sided Custom PCB Assembly

Fig 2 - A Singe Sided Custom PCB Assembly

A Single Sided Custom PCB Assembly

The single sided custom PCB assembly is on of the most common containing one conductive layer fashioned over a substrate.

Therefore, you find the components placed on one surface with the routing on the reverse.

Double-Sided Custom PCB Assembly

In a double sided custom PCB assembly, you have copper films fashioned over both substrate surfaces. You connect the two conductive layers by drilling and creating interconnecting holes called vias.

You can fashion components on both the surfaces allowing you an increase component density over the single-sided type.

Multi-Layer Custom PCB Assembly

Any circuit board assembly with more than two conductive layers is a multi-layer custom PCB assembly.

When designing a multi-layer custom PCB assembly, you configure it like a sandwich employing an insulating layer below a conductive layer.

Fig 3- Multi Layer Custom PCB Assembly

Multi- Layer Custom PCB Assembly

You can achieve a high component count with multilayer custom PCB assembly in a compact design.

Such boards demonstrate high performance levels and are suitable for high-speed applications.

Rigid Custom PCB Assembly

A rigid custom PCB assembly is unbendable employing a firm substrate which makes it impossible to fold without damage.

You can have a rigid custom PCB assembly in a multilayer configuration or single or double-sided.

Flex Custom PCB Assembly

You find the substrate in a flex custom PCB assembly consists of a substrate made to accommodate bending and folding.

You furnish such substrates form easily manipulated material such as polyimide, PTFE and polyester film.

Rigid-Flex Custom PCB Assembly

You can have both aspects of a rigid and a flex type custom PCB assembly on a single board.

The result is a rigid-flex custom PCB assembly which can have rigid sections and parts that you can bend or flex.

Typically, you employ the flexible part for interconnections where you can employ shorter conductive paths.

Fig 4- Rigid Flex Custom PCB Assembly

 Rigid Flex Custom PCB Assembly

Where Can You Use Custom PCB Assembly?

You can employ a custom PCB assembly in different applications such as:

Automotive Applications

Modern vehicles feature more electronic systems supporting various functionality such as safety and entertainment.

These vehicles can employ custom PCB assembly to achieve desired functionality in areas such as navigational and entertainment systems.

Consumer Electronics

Custom PCB assemblies find use in consumer electronics intended for various purposes such as communication and entertainment.

You can employ custom PCB assemblies in computers, gaming consoles and television sets.

Industrial Applications

Use of custom PCB assembly in industrial applications can aid in automation which improves product quality by increasing accuracy levels.

Custom PCB assemblies find use in industrial equipment such as assembly machines, power equipment and measuring devices.

Medical Devices

Application of custom PCB assembly in medical devices extends from their use in monitoring equipment to management devices. Some of the devices and equipment that can employ custom PCB assembly includes: X-ray machines, ultrasounds, electronic microscopes and compressors.

How Handle Custom PCB Assembly?

Making a custom PCB assembly entails the following processes:


Before commencing on fabrication of your custom PCB assembly, you need to develop a design. Board design entails selecting board aspects such as the layer count, trace pattern and component placement.

You can employ computer software in the process after which you print the design highlighting the conductive and non-conductive board areas.

The print outs have to be for each layer where you employ multiple board layers.

Substrate Creation

The substrate is the base of a custom PCB assembly supporting the structure consisting of non-conductive material.

In creating the substrate you employ materials such as epoxy resin and glass fiber through a curing process.

Creating Copper Pattern

You first print the design of your copper pattern on the copper films of your custom PCB assembly laminate.

You employ a photo-sensitive film that hardens on exposure to ultraviolet light allowing removal of the unneeded copper areas.


After forming the copper pattern of your custom PCB assembly, you fuse your layers together to form a single structure.

You employ a gluey substance called prepreg in attaching your custom PCB assembly’s conductive and substrate layers.

You secure the layer stack with a clamp and carry out the lamination process under heat and pressure.

The heat melts the prepreg which adheres to the stacked surfaces while the pressure secures them in a frim bond.


The drilling process during custom PCB assembly allows you to furnish holes for component attachment and interlayer communication.

You can plate some of the drilled holes to make them conductive for thermal and electrical transfer.

Outer Layer Imaging And Plating

Imaging allows you to create the desired copper pattern of the outer layer that you typically employ for component attachment.

Plating the copper layer offers the underlying copper from corrosion during the etching process.

Applying Solder Mask And Silkscreen

A solder mask protects your copper pattern from interacting with solder during the component attachment process.

You note that this prevents the formation of solder bridges which will interfere with the electrical signal path transfer.

You apply a silkscreen over the solder mask allowing you to identify parts and other information related to the board.

Surface Finish And Testing

A surface finish serves to provide a solderable surface for your custom PCB assembly and to protect the copper tracks.

Using a surface finish on your board enhances the solder bond quality.

Testing involves determining the functionality of your custom PCB assembly and its conformity to the design.

Testing can help you unearth faults before roll out saving time and money.

Fig 5- There Are A Number Of Processes Involved In Making Custom PCB Assembly

There Are A Number Of Processes Involved In Making Custom PCB Assembly

Can You Use CAM In Custom PCB Assembly?

Yes, you can.

Computer-Aided Manufacturing (CAM) employs software and computer-guided machinery to automate processes sin manufacturing.

CAM employs files containing board aspects such as layer counts, the copper infrastructure, solder mask pattern, and drill locations.

You can also use CAM to configure the production panel parts maximizing material usage and efficiency of the machine.

Consequently, using CAM in custom PCB assembly helps you achieve high levels of precision and hence quality.

What Materials Can You Employ In Custom PCB Assembly?

The material you employ in a custom PCB assembly is subject to your power needs and thermal dissipation.

You can use the following materials in your custom PCB assembly:


In PCBs, this is the most often used material that incorporates an epoxy laminate sheet with glass reinforcement.

Flame retardant and water resistant, the epoxy has a high strength-to-weight ratio providing FR-4 an extremely high tensile strength.


PTFE is a type of plastic that has no resistance and therefore employed in high-speed, high-frequency applications.

Because PTFE is so flexible, it’s ideal for applications with tight tolerances.

It’s also quite light, allowing employment in a variety of industries where size and volume are a concern.

PTFE is flame resistant, with immense physical strength and capable of maintaining thermal stability.


Custom PCB assembly made using this material’s substrates offer excellent corrosion, mechanical stress, and temperature resistance.

Additionally, fluoropolymers have low adhesion, good wear resistance, and extended life qualities on a mechanical level.


Polyimide material’s prominence is pursuant to the growing popularity of flexible and rigid-flex custom PCB assemblies.

These PCBs are changing various electronic applications by effectively and simply eliminating electrical connection challenges in terms of reliability.

Their capacity to flex and wrap themselves in areas with space limitations allows them to accomplish this activity.

Acrylic Adhesives

Renowned for their ability to retain their malleability even after polymerization, these materials are ideal for all dynamic applications.

Acrylic adhesives have a greater expansion coefficient than other custom PCB assembly substrate materials.

Epoxy Adhesives

Epoxy adhesives form a hard substance after polymerization, making them unfitting for dynamic applications.

They are, however, a good choice for the creation of multilayer custom PCB assemblies that can survive high working temperatures.

Fig 6- Epoxy Adhesives Are Perfect In Multilayer Custom Assembly

Epoxy Adhesives Are Perfect In Multilayer Custom PCB Assemblies

Liquid Crystal Polymers (LCP)

LCPs find employment in the production of multilayer custom PCB assemblies requiring reduced thickness.

LCPs consist of a non-reactive, very inert substance with great flame resistance.

These materials are light and flexible, with exceptional electrical properties making them excellent for high-frequency applications requiring minimum weight and thickness.

Liquid crystal polymers also offer excellent dielectric characteristics, resulting in little losses and moisture absorption.

Insulated Metal Substrate (IMS)

You find aluminium commonly employed as the insulated metal substrate otherwise known as metal clad PCBs.

Such substrates compose a thin layer of thermally conductive but electrically insulating material layered between a metal substrate and copper film.

What Substrate Parameters Do You Consider For Custom PCB Assembly?

When selecting substrates for your custom PCB assembly, you need to consider their individual parameters as follows:

Glass Transition Temperature

The slow and reversible transformation of amorphous materials from a hard to rubbery condition as temperature rises is glass transition.

The glass transition temperature describes the temperature range in which the glass transition occurs.

Ultimate Tensile Strength

A material’s ultimate tensile strength (UTS) is the maximum stress it can withstand before breaking when pulled or stretched.

Brittle materials’ ultimate tensile strength is close to the yield point, but ductile materials’ ultimate tensile strength may be higher.

Shear Strength

The resistance of the security PCB substrate material to failure under a shear load is referred to as shear strength.

You describe shear load as a force causing a material to slide in a plane parallel to the force direction.

Thermal Expansion

The tendency of a security PCB substrate to change size and density with changing temperature is known as thermal expansion.

You calculate the linear thermal expansion coefficient of a material by dividing the expansion and temperature change.

Dielectric Constant And Loss

The dielectric constant is a material attribute that defines how a charge changes when compared to a vacuum.

Dielectric loss, on the other hand, describes how a substrate material releases electromagnetic energy in form of heat for instance.

Breakdown Voltage

The voltage at which a security PCB substrate begins to demonstrate electrical conductivity is known as the breakdown voltage.

Why Do You Use Copper In Custom PCB Assembly?

Use of copper in custom PCB assembly is popular for the following reasons:

  • Copper is a good electrical and thermal conductor. It improves heat transport in the custom PCB assembly reducing the stress produced by uneven heating.
  • Copper is a good conductor requiring you to utilize only a small amount of the material. You can convert a copper ounce into a square foot film, 35 micrometers thick.
  • The thermal resistance of copper and electrical signal transfer capability enhances reliability of electronic equipment when used in harsh environments.
  • Copper’s effective heat transfer qualities allows the installation of heat sinks directly to the copper.

Alternatively, you can construct custom PCB assemblies with heat-generating power components on one side and a copper layer on the other.

How Do You Pattern Copper On The Substrate Of A Custom PCB Assembly?

The process of patterning copper on the substrate of a custom PCB assembly can be subtractive, additive or semi-additive.

Subtractive methods strip copper off a copper-coated board, leaving the required copper design.

In additive methods, you employ a sophisticated procedure to electroplate a pattern onto a bare substrate.

The additive approach has the advantage of requiring less material and producing less waste.

The most popular method is semi-additive in which you employ a reverse mask over the unpatterned board.

You then develop the mask to reveal the areas of the substrate that would ultimately form traces.

What Components Types Do You Use On Custom PCB Assembly?

In making a custom PCB assembly, you employ two common component types:

Through-hole Components

These components possess leads you insert into drilled holes in the boards and solder them to pads on the reverse side.

Through-hole components can either be axial or radial.

Axial components are cylindrical with leads protruding from both sides like they were inserted right through across the body.

Radial components have leads extending from the bottom surface of their body and parallel to each other.

 Through Hole Components

Through Hole Component

Surface-mounted Components

SMT components have very small leads or entirely lack them allowing you to directly mount them on a custom PCB’s surface.

They are therefore much smaller than the through-hole components allowing increased board density.

Surface Mounted Components

Surface Mounted Components

What Soldering Processes Can You Use On Custom PCB Assembly?

Soldering is a process you employ in attaching components to the custom PCB assembly to form electrical connections.

You can manually solder components on to the board surface or automatically via wave soldering and reflow soldering.

Wave Soldering

Wave soldering is a mass soldering technique you mostly utilized for through-hole component soldering.

You pass the custom PCB assembly over molten solder trough, where a pump creates a standing wave-like upwelling of solder.

The components join in a weld to the circuit board as it interacts with the wave.

A PCB Undergoing Wave Soldering

A PCB Undergoing Wave Soldering

Reflow Soldering

Reflow soldering temporarily attaches electrical components to contact pads using a solder paste followed by controlled heating of the entire assembly.

Thereafter, the melted solder material reflows forming permanent solder connections.

Reflow Soldering

 Reflow Soldering

What Component Packages Are Available For Custom PCB Assembly?

Component packages are useful in securing your components to the board. When making a custom PCB assembly, you can employ the following packages:

Dual In-line Package (DIP or DIL)

A dual in-line package (DIP or DIL) has a rectangular enclosure with connection pins on two parallel rows.

You can put the package into a socket or through-holes on a circuit PCB assembly.

Pin Grid Array (PGA)

The pins are organized in a regular array at the base of the package which is usually square or rectangular.

The pins are typically 2.54 mm apart and may traverse the whole package underside or not connecting via sockets or through-holes.

Quad Flat Package (QFP)

A QFP is a surface-mount IC package with a double pairing of gull wing leads projecting from each side.

Pin counts can range from 32 to 304, with pitches ranging from 0.4 to 1.0 mm.

You find it impossible to through-hole mount these packages but you can socket them albeit rarely.

Flat No-Leads Package

Flat no-leads packages includes quad-flat no-leads (QFN) and dual-flat no-leads (DFN).

These packages connect IC chips to custom PCB assemblies physically and electrically via surface mounting.

You establish electrical connections to the board via perimeter lands at the package base.

These packages incorporate a thermally conductive pad to facilitate heat transfer out of the chip to the board.

Ball Grid Array (BGA)

BGA is a surface-mount packaging you use in the permanent installation of components like microprocessors.

Using balls on an entire surface rather than just the perimeter has shorter traces resulting in improved high-speed performance.

How Can You Employ Vias In Custom PCB Assembly?

Vias are plated drilled holes that aid in interlayer connections providing paths for electrical and thermal transfer.

You can employ different vias in a custom PCB assembly as follows:

  • Through-via: Runs through the board connecting the top layer to the bottom layer.
  • Blind via: Connect inner layers to outermost layers.
  • Tented via: Occur when you use solder mask to cover vias extending to the outer surface.
  • Buried via: Only connect inner layers effective in distributing component fan-out.

Can You Employ Design Software For Custom PCB Assembly?

Yes, you can.

Circuit design software allow you to accurately and comprehensively present the board structure of a custom PCB assembly.

You can employ design software for developing multilayer boards with high-frequency use.

Some of the features supported by design software includes: batch command execution and positive and negative annotation of assembly.

Additionally, you can have design software supporting different operating systems such as iOS, Windows and Linux.

Common design software available includes: Altium, Eagle, Kicad, ORCAD and Allegro.

What Surface Finishes Can You Find On Custom PCB Assembly?

Selecting a surface finish for your custom PCB assembly in an essential step influenced by component choice, cost and environmental impact.

The PCB surface finish is useful in offering your copper circuitry protection from deterioration and providing a solderable surface.

You can employ the following finishes on your custom PCB assembly:

  • Hot Air Solder Leveling (HASL)
  • Lead-Free HASL
  • Immersion Tin (ISn)
  • Immersion Silver (IAg)
  • Electroless Nickel Immersion Gold (ENIG)

How Can You Test A Custom PCB Assembly?

Testing a custom PCB assembly is paramount in determining its conformity to the design and functionality. You can test a custom PCB assembly via the following test procedures:

In-Circuit Testing (ICT)

An (ICT) is the most reliable and costly method of PCB testing currently available.

In this test, you employ a bed-of-nails test, to check if the solder connection integrity matches the custom PCB design.

Flying Probe Testing

The flying probe test is non-powered and costs less than ICT.

In these test, you check for opens, shorts, resistance, inductance and capacitance values, and diode issues.

Automated Optical Inspection (AOI)

AOI takes images of the custom PCB assembly using a single 2D camera or two 3D cameras.

Thereafter, the computer compares your board’s images to a thorough schematic.

Burn-In Testing

Burn-in testing is an intensive testing approach that seeks to identify early problems and determine load capacity.

Burn-in testing can be damaging to the parts being tested due to its intensity.

X-Ray Inspection

Using an X-Ray inspection allows you to identify defects beforehand by examining the solder connections, internal traces and barrels.

You can employ 2D or 3D tests with the latter offering you faster and accurate tests.

 Testing Of PCB Using Automated Optical Inspection System

Testing Of PCB Using Automated Optical Inspection System

What Factors Affect Cost Of Making Custom PCB Assembly?

When making a custom PCB assembly, you find the following factors contribute to the overall cost:

Material Choice

There are several factors that influence the choice of material you employ for your custom PCB assembly. These factors include: thermal reliability, heat transfer property, mechanical properties and signal performance.

Board Size

You find the size of your custom PCB assembly determined by the circuit infrastructure you need for the application.

Layer Count

You note that the more the layers in your custom PCB assembly, the higher the construction costs.

Surface Finish

You have different surface finishes you can employ for your custom PCB assembly such as HASL and ENIG. For instance, ENIG is a costly finish whereas HASL is one with the least costs attached.

Minimum Trace And Space

You require a proper trace width in your design to accommodate current transfer without the risk of overheating and damage. There is a relationship between the trace width, copper thickness and carrying capacity on custom PCB assemblies.

Customization Level

When making a custom PCB assembly, you can customize several aspects to improve factors such as EMC and impedance control.

The more aspects you customize, the higher the cost of fabricating your board.

What Are Some Of The Standards Guiding Custom PCB Assembly?

Standards safeguard the quality of your custom PCB assembly allowing their reliable performance in application. Some common standards you can employ are:

  • IPC-A-610 which defines the acceptability of electronic assemblies governing their handling and hardware installation.
  • IPC J-STD-001G identifies the requirements for soldered electrical and electronics on your custom PCB assembly.
  • IPC-A-600 outlines the features making your custom PCB assembly acceptable.
  • IPC/WHMA-A-620C provides the requirements and acceptance for the connections you employ in your custom PCB assembly.
  • IPC 7711/7721C defines guidelines for rework, repair and any modification done on your custom PCB assembly.

At Venture Electronics, we offer affordable and reliable custom PCB assembly services.

Contact us now for any inquiries or questions on custom PCB assembly.

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