Type of cheap flex pcb Venture build.
We can classify flex pcbs by: number of conductive layers, design and material, with or without PTH,
1.1 Single-sided flexible PCBs with one conductive layer. They are the most typical flexible boards for dynamic, flexible applications.
1.2 Double-sided flexible boards with two conductive layers with PTH. They also come with or without stiffeners. Copper is attached to both sides of the substrate and then drilled, etched and insulated on both sides with top and bottom dielectric overlays.
1.3 Multilayer flexible printed circuit board with three or more conductive layers, with PTH. PTH technology is used to facilitate the interconnection of the conductive layers. They use multiple layers of rigid and flexible plates with three or more conductive layers and PTH.
What's the difference between flex pcb and rigid pcb?
First, the manufacturing process of flexible is more complex than rigid.
In addition, the cost of flexible PCBs is higher than rigid PCBs. flexible PCBs require more manufacturing time, it is difficult to repair. However, flexible PCBs are more reliable and faster. In other words, we can say that flexible PCBs will be more popular in the future world of technology.
Where to use rigid PCBs? First of all, devices that require low-cost circuitry, such as the motherboard of a computer system. However, they can be used for any type of complex circuitry. Because they have different types of boards can be used for different objectives.
Where to use rigid PCBs? For ultra-compact and high-performance devices. For example, smartphones, cameras, tablets, wearables, GPS devices, etc.
Materials composition of flex pcb.
Conductors: They permit electrical signals to flow in the circuit. The common conductor used in flexible PCBs is copper. However, in some applications, use some othet materials like aluminum, carbon and silver ink.
Adhesive: For the binding of surface mount devices, adhesive is used. It is used prior to customer specifications and conductor thickness. Epoxy, acrylic or PSA (Pressure Sensitive Adhesive)are commonly used adhesives,however, not required for all applications.
Insulators: They are mainly used to isolate electrical conductors, but sometimes they are also used as supports. The most common insulators are polyimide, polyester, solder resist, polynaphthalene and polyethylene terephthalate.
Finishes: Treatments protect the metal surface of the board from oxidation. The type of finish varies by application. Tin, nickel, gold, silver and carbon are the most widely used.
Flexible PCB has an ability to enable the circuitry to be designed to fit the electronic device or product, as opposed to building the device to conform to the circuit board. Flex circuit boards are characterized by a distinctly patterned printed circuitry and component arrangement highlighted by a malleable base material.
Flexible PCB is also known as flexible printed circuits or flexible electronics, it provides greater options for designers and engineers when assembling electronic circuits.
Your Leading Cheap Flexible PCB Stack-up Supplier in China
When looking for a cheap yet durable and flexible PCB, choose the reliable manufacturer, Venture. At Venture, we manufacture flexible PCB according to your specifications.
Venture Flex Circuit or Flex PCB is a patterned arrangement of printed circuitry and components that utilizes flexible based material with or without a flexible cover lay. It is also known as flexible printed circuits or flexible electronics, it provides greater options for designers and engineers when assembling electronic circuits. These flexible electronic assemblies may be fabricated using the same components used for rigid printed circuit boards, but allowing the board to conform to the desired shape during its application.
Cheap flexible PCBs are used widely in everyday technology and electronics in addition to high-end, complex completed components. The two of the most prominent examples of flexible circuit usage is in devices, modern portable electronics, hard disk drives, and desktop printers.
Flexible circuits are also used extensively in other applications and industries including communications, consumer electronics, automotive, medical, industrial, aerospace, military, and transportation.
In transportation, they are extensively used due to their improved resistance to vibrations and movement.
Venture flexible PCB has a maximum of 10 layers. Its thickness is 0.1mm – 0.2mm, but some flexible PCB can be 0.3mm. The size of the flexible PCB depends on the application.
Maximum width of flexible PCB material is 250mm because flexible PCB material is a roll, each roll width is 250mm, the length has no limit. So, when you design a flexible PCB, one side should be less than 250mm.
Moreover, we add small stiffeners to allow one end of the material to be rigid. We use gold plating in connector terminal applications and we are using LPI solder mask on a flexible substrate to keep solder mask damns intact.
The best advantage of flexible PCB is its flexibility. If too much copper, it will not be easy to bent for your device.
We can supply a flexible PCB according to your design and you can send it to us.
Please contact us for more information.
Cheap Flexible PCB-The Ultimate FAQ Guide
Choosing cheap flexible PCB, without comprising quality can be an overwhelming task.
In this guide, you’re going to learn everything you should look for when choosing cost effective flexible PCB.
- What is a Cheap Flexible PCB?
- How much does a Cheap Flex PCB Cost?
- What are the Materials used in making cheap flex PCB?
- Does Cheap Flexible PCB imply Low-Quality PCB?
- What are the Advantages of Cheap Flexible PCBs?
- What are the Applications for Cheap Flexible PCBs?
- What are the Factors that can make a Flexible PCB to be Cheap?
- What are the Steps involved in Cheap Flex PCB fabrication?
- What must you Consider before Manufacturing a Cheap Flex PCB?
- What are the Common Problems of Cheap Flex PCB and their Solutions?
- Is there a Way of Reducing the Cost of Flex PCBs? If there is, how?
- How many Layers does a Cheap Flex PCB has?
- What is the Thickness of a Cheap Flex PCB?
- What is the Minimum Space between the Pads in a Cheap Flex PCB?
- What is the Board Thickness Tolerance of a Cheap Flex PCB?
- What is the Outer Copper Thickness of a Cheap Flex PCB?
- What is the Inner Layer of a Copper Thickness of a Cheap Flex PCB?
- What is the Drilling Size of a Cheap Flex PCB?
- What is the Minimum Character Height and Width of a Cheap Flex PCB?
- Which Surface Treatments are used in Cheap Flex PCBs?
- What is the Lead Time for Cheap flex PCB?
- How can you Test the Quality of a Cheap Flex PCB?
What is a Cheap Flexible PCB?
These are flex PCBs that are cost-effective.
There are many of such PCBs available in the current market with around 1017 of their products.
However, even as you focus on the cost, don’t compromise the quality of cheap flexible PCB.
Cheap flexible PCB
How much does a Cheap Flex PCB Cost?
The cost of the cheap flex PCB varies in the current market.
For example, some cost as low as 0.1 USD while others cost 0.2 USD.
In some places, they may be bought at a price range of between 3 to 10 USD.
What are the Materials used in making cheap flex PCB?
The PCB materials that are used in producing cheap flex PCBs are those that allow for a better design.
They also help in increasing the circuit functional capacity as it maintains its reliability, quality, and consistency.
The materials commonly used are copper-clad laminates and pre-pregs that are of good quality and performance.
Besides, the copper-clad is placed at the top and bottom of the PCB.
Then there is an overlay, bond-ply, and then adhesive in the 2nd, 3rd, and 4th layers respectively.
The 5th layer is covered with copper-clad and then an overlay as the 6th layer.
The bond-ply and sheet adhesive form the 7th and eighth layers respectively.
Does Cheap Flexible PCB imply Low-Quality PCB?
No. The quality of this PCB is not compromised at all.
The reduction in its price is as a result of using low-cost materials, and large batch production.
It is also due to the use of the new technology that is much faster than the initial one.
What are the Advantages of Cheap Flexible PCBs?
There are many benefits of using the cheap flex PCB that can influence you into choosing them.
Below are some of them.
- They are very flexible and this allows them to give room to bending of the devices made from them.
- These PCBs can be used to mount many components since it saves on space on its surface. This makes them ideal for compact machines.
- It is highly reliable because it possesses a high tensile strength. The PCB cannot be destroyed even if warped or deformed since it can bend up to 360 degrees.
- These PCBs can be prepared for unfriendly environments since they are strong.
- They are cost-effective since fewer materials are used. The packaging demand is also reduced and the cost of replacing its lower parts is also minimized. It is rarely repaired because errors encountered during its production are very minor.
- There are the elimination of mechanical connectors and high circuit density which ensures high output at relatively low cost.
- The equipment made from cheap flex PCBs has a more robust temperature range for operation. They also produce strong signal quality.
What are the Applications for Cheap Flexible PCBs?
There are many applications for these types of PCBs.
For example, they are used in making military, telecommunication, transportation, and medical devices.
Also, they are used in the manufacturing of automotive, aerospace, and consumer devices.
The industries that most uses of these PCBs are those that produce household and communication devices.
What are the Factors that can make a Flexible PCB to be Cheap?
The factors that can help in lowering the flexible PCB include making use of cheap materials.
This will reduce the overall cost of a PCB, but maintain its quality in the long run.
Apart from these, you should look around you and order for these PCBs from manufacturers that are close to you.
This will reduce the shipping cost thereby reducing the overall cheap flex PCB price.
In addition to these, you can remove the mechanical connectors that increase the cost.
Lastly, you can produce these PCBs in large quantities because large batches are generally cheap in comparison to small ones.
What are the Steps involved in Cheap Flex PCB fabrication?
Several steps add up to a complete fabrication process of a cheap flex PCB.
In this case, let me take you through three major steps.
Step 1: Building up a Cheap Flexible PCB
Here a polyimide and FR4 are used to produce cheap flex PCBs.
Building a cheap flex PCB using polyimide involves placing the circuits close with each other using a nesting mechanism.
All the circuit layouts should be divided into four parts per panel.
When you use nesting, every panel can contain at least 16 segments.
The yield can be improved by doing the following:
Looping: You can add an excess quantity of flex PCB material to improve its service and circuit assembly.
Sizing the conductors: You have to choose the thinnest copper to facilitate the PCB’s circuit flexibility.
This is very critical when you are planning to use the PCB for different applications.
Etching: All the losses during the etching process should be compensated for. These losses are determined by the type of copper used, conductors, machines and the etch marks.
Conductors routing: It is easy for you to get the best routing of conductors. This is possible when it’s done on the right of the perpendicular place to facilitate bending and folding.
Normally this happens because the stress in specific PCB regions has been minimized.
Creating ground planes: with enough allocation of an electrical circuit, you can make the ground areas crosshatched. Later on, you can work on the circuit flexibility by reducing the entire PCB weight.
Step 2: The Fabrication Process of the Cheap Flex PCB
This process begins with conductor width spacing which normally is 375 micrometers.
The polymer can carry up to 25% of the current.
These PCBs have a diameter that ranges between 200-250 micrometers, although it may be influenced by the design and application.
The PCB fabrication process involves three main processes.
Sizing of the holes: You can produce very tiny holes using the available technological tools.
These enable a well compacted and inclines layout of the PCB.
Currently, you can create very small holes with a diameter of 25 micrometers.
Filleting: This is required for both the pads and the termination points.
This process facilitates the even distribution of the stress due to the multiplication of pad areas.
Filleting works well with through-hole since it is ideal for creating reliable solder joints.
Plating of buttons: During this process, you can make a substitute plated through-hole using copper for both via and the through-hole itself.
Step 3: Consideration for Physical Limitations and Possible Chemical
The process involves looking at limitations and effects brought by cover layers and the cover coatings.
These cover coatings have varied issues that call for attention. Below are some of them.
The adhesive-backed films: These are ideal for different applications because it has balanced raw materials.
Because of this characteristic, many manufacturers prefer using these adhesives.
The screen-printable liquid overcoats: This type of coating is cost-effective and is good for coating polymer thick film.
The photo imaginable liquid and film polymers: This is a new and advanced coating technique in the current market.
The coats are imaged and this allows you to view the termination features of the cheap flex PCB.
This type of coating has no errors as opposed to other types of the cover layer.
What must you Consider before Manufacturing a Cheap Flex PCB?
Using cheap flexible PCBs provides you with an opportunity to develop different interconnections and reliability.
The devices made from these PCBs are light in weight, durable, and compacted.
New technologies are coming up but before manufacturing these types of PCBs, you should consider the following.
Different design of flexible PCB
The reduction of its weight by choosing the appropriate materials: Many electronic machines that have been made using the cheap flex PCB have lightweight.
This is so because they lack reinforcements and are density high in comparison to unfilled polymers.
Consider the Reduction of the assembly time: The cheap flex PCBs manufacturing process take relatively less time because they break.
It’s the breaking that contributes to the longer time taken in producing rigid PCBs.
The cost of the material to be used must also be considered: The materials are expensive but you have to choose the cheap ones that can lead to the lower PCB cost.
You should also ensure that no materials are wasted during the manufacturing period.
The applications it’s intended for is also another thing to consider: Research has is that most of the household appliances, transport, and communication gadgets are manufactured using these PCBs.
A large quantity of these devices requires the manufacturing of more of the cheap flex PCBs.
Consider the character of the devices it will be used to manufacture: The devices that need high heat resistance should be made from flat copper tracks.
This is ideal because the cheap flex PCBs have more heat resistance in comparison to other PCBs.
The dynamic flexing of the PCB: If the PCB is supposed to have 360 degrees flexibility, you can use polyimide that has a thin copper foil. This is relevant for many applications.
Consider the required bending radius of the cheap flex PCB: This is determined by the copper thickness and the overall PCB thickness.
The number of complete bending layers is also another determinant.
A cheap flex PCB with one side has only 3 to 6-time bending capabilities.
The double-sided one provides 7 to 10 times bending capabilities.
Fortunately, the dynamic flex devices can have between 20 to 40 times bending capability.
The possible designs that you can produce: The cheap flexible PCBs can be designed in many different ways. There is room for customization of the designs and this depends on your needs.
What are the Common Problems of Cheap Flex PCB and their Solutions?
There are many shortcomings experienced when producing cheap flex PCBs.
Let me highlight some of them and their remedies below.
There are problems associated with the solder mask that affect the underlying traces.
This can be corrected during the designing stage.
Another shortcoming is in the solder pads.
It is important to have adequate space between the copper traces and the solder pads.
Failure to do this, the reliability and durability of the PCB is compromised.
To avoid such issues, ensure your cheap flex PCBs are manufactured by a team of experts.
In addition to these, there could be problems in the solder joints.
The solder joints appear dry with dull solders leading to cracking in the joints when you try to bend it.
The solution here is to make sure the production is done by proficient engineers to achieve reliability and durability.
Is there a Way of Reducing the Cost of Flex PCBs? If there is, how?
Yes, it is possible to reduce its cost.
First of all, you have to estimate the manufacturing cost by considering different factors.
This can assist you in choosing a good PCB manufacturing industry.
The number of layers in a PCB is an important factor that influences its cost.
Therefore, you can produce PCBs with a few layers.
Apart from this, the materials being used also vary in their cost.
For example, polyimide is the cheapest and ideal for the production of cheap flex PCBs.
How many Layers does a Cheap Flex PCB has?
The number of layers a cheap flex PCB has varied. Some are single-layered while others have a double layer.
Also, others have multiple layers PCB designs that may range from 4 to 10 layers.
Multi layer flexible PCB design
What is the Thickness of a Cheap Flex PCB?
The thickness of this type of PCB varies from one board to another. Some are thin while others are relatively thick.
Generally, the thickness may vary from 0.4 to 2.4 mm although the thickness is in even numbers.
For instance, 0.4, 06, 0.8, 1.0, 1.2, 1.4, 1.6, up to 2.4 mm are the available cheap flex board thicknesses.
What is the Minimum Space between the Pads in a Cheap Flex PCB?
The least spacing between the pads is around 4 mil.
To reduce the cost of the PCB production, you can design it with a spacing of 6 mils.
What is the Board Thickness Tolerance of a Cheap Flex PCB?
The tolerance board thickness is either plus or minus 10%.
In normal circumstances, the plus tolerance happens due to the PCB processing steps like solder mask and electro-less copper.
Other types of finishes on the board may also result in plus thickness tolerance.
What is the Outer Copper Thickness of a Cheap Flex PCB?
In most cases, the outer copper layer exhibit 35, 70, and 105-micrometer thickness.
These can be ascertained by taking the copper weight measurements.
For instance, 1oz, 2oz, and 3oz.
If at all you need more weight, you can communicate with the manufacturers.
This will enable you to get whatever cheap flex PCB outer copper thickness that you desire.
What is the Inner Layer of a Copper Thickness of a Cheap Flex PCB?
The inner layer of copper thickness is different.
Usually, this layer thickness ranges from 1oz =35 to 1.5oz=50 micrometers.
What is the Drilling Size of a Cheap Flex PCB?
These types of PCBs have a range of drill sizes.
For example, there is a range of between 0.2 to 6.3 mm.
What is the Minimum Character Height and Width of a Cheap Flex PCB?
The least character of these PCBs is 0.15 mm and its minimum character height is 0.8 mm.
The challenge here is that it’s difficult to discover if the height is less than 0.8 mm.
Which Surface Treatments are used in Cheap Flex PCBs?
Several types of surface finishes can be used in the type of PCB.
For instance, HASL with lead, HALS lead-free and immersion gold are the most commonly used types.
What is the Lead Time for Cheap flex PCB?
The lead time is the period a flex PCB takes to be produced and this includes both weekends and holidays.
The time is counted from the second day when the Gerber has been confirmed.
Also, the lead time also includes time taken to answer all engineering questions and the effecting of order payments.
Therefore, the cheap flex PCB has a lead time of 4 days.
If the quantity of the PCBs ordered is huge, it can take up to 7 days.
How can you Test the Quality of a Cheap Flex PCB?
Cheap flexible PCB
When manufacturing a cheap flex PCB, its quality assurance is important.
The best products must be certified by ISO14001 of 2004, ISO9001 of 2008, and UL.
Also, when manufacturing it, you must follow all the IPC standards.
Testing the board calls for the use of capacitance and resistance.
The capacitance tests for opens and shorts by sending charges on either the trace or plane.
You can probe every plane to measure the capacity that has been induced.
The resistance tests the flow of the current via a conductor or trace in ohms.
Different types of testing techniques like in-circuit, flying probe, automated optical inspection, burn-in, X-ray inspection, and functional testing are used.
At Venture Electronics, we give you the best cheap flexible PCB that meet your unique performance specifications.
Contact us now for all your cheap flexible PCB needs.