Definitive Authority in Polyimide PCB Production

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We Use Only Top-Notch Polyimide PCB Materials

Eager to please you, we are PCBTok, a PCB company based in Shenzhen.

We’re available to help you with your custom PCBs.

Of course, we can make both rigid and polyimide PCBs.

We are confident that all of our printed circuit boards are built to last.

We comply with strict quality control standards to meet IPC Class 2 or 3.

Our Polyimide PCBs are available from PCBTok in all varieties.

Our areas of expertise are PCB supply and cover polyimide-based PCB.

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Polyimide PCB By Feature

Flexible Polyimide PCB

Because coverlay uses polyimide to make it a stronger but flexible material, flexible PCB is sometimes also known as polyimide PCB.

Rigid-Flex Polyimide PCB

The use of polyimide in the flex component by rigid-flex PCB has the bonus of eliminating connectors that require mechanical drilling.

2 Layer Flex Polyimide PCB

Polyimide will be a major component of a 2 Layer Flex PCB to help it fit into especially tailored small spaces.

Multilayer Flex Polyimide PCB

Multilayer Flex PCB uses polyimide in Flex PCB assembly. Even some designers only work polyimide for with multilayer flex.

High Tg Polyimide PCB

High Tg PCB, some devices won’t work properly without it. You can find products like this that are high quality and low-priced.

Customized Polyimide PCB

Customers who need complex electronic wiring for their devices but only have have limited space can use customized types.

What is Polyimide PCB?

Some circuit boards are created using the material polyimide.

A Polyimide PCB, then, is obviously made primarily of polyimide.

Two crucial qualities set Polyimide PCBs apart from their fiberglass counterparts.

These include flexibility and tolerance for high temperatures.

Even though there are a few high-temperature boards available,

None of them quite reach the 250-260 degrees Celsius that polyimide-based circuit boards can.

Tensile strength is a benefit of the flexible quality of polyimide.

What is Polyimide PCB
Advantages of Using Polyimide PCB Material

Advantages of Using Polyimide PCB Material

Customers are primarily drawn to polyimide’s flexible nature and heat resistance when considering using it for PCBs.

However, there are additional benefits as well.

If you give it some thought, the flexibility gives the PCB designer the freedom to experiment with the electronic material’s outer casing.

Chemically speaking, polyimide is tough. Although some corrosion is unavoidable, it is usually resilient.

Tensile strength, which we briefly discussed, means that the PCB is less likely to warp even if it undergoes numerous flex cycles, which is typical in flex circuits.

Limitations of Polyimide PCB Material

There are few PCB alternatives to polyimide. It’s because not all PCB materials are appropriate for flexing components.

Cost and a few modifications made by the PCB engineer when designing the board itself are the only two restrictions that polyimide PCB has.

The PCB designer may observe a sizable difference when calculating the Bill of Materials (BOM) compared to using FR4 material in previous version.

Consumer goods made of polyimide material have a bright future; so far, the advantages outweigh the drawbacks.

Limitations of Polyimide PCB Material

Find a Credible Polyimide PCB Supplier

Find a Credible Polyimide PCB Supplier
Find a Credible Polyimide PCB Supplier 2

At PCBTok, we carefully and precisely manufacture PCBs using a unique manufacturing process.

The majority of consumer, industrial, and medical electronic products are built on flexible and rigid-flex types of polyimide.

We begin by choosing the best ecologically sound material for your project.

We at PCBTok are proud to produce PCBs of the highest caliber available. All of our products are expertly made and covered by a satisfaction guarantee.

Polyimide PCB Fabrication

Applications of Polyimide PCB

Because polyimide material can withstand it without contracting, these are applications for it.

  • Nowadays, the majority of consumer electronics, including laptops, wearables, and computer devices, use the material to be aesthetically pleasing.
  • The majority of manufacturing equipment, including processing equipment, where lot of heat is generated.
  • In automotive applications like antilock brakes, flexible PCBs are essential for vehicle security.
  • Due to polyimide’s high level of efficiency in high-speed applications, it’s applicable for satellites.
Types of Polyimide PCB

There are numerous ways to categorize the various polyimide PCB types, but we will concentrate on the number of layers. This is the listing:

  • The board’s one side is used for mounting components in the single-sided type. Simple and affordable design
  • Due to its possibility of being tested with 3D inspection, the double-sided type offers a practical means of maintaining and repairing the entire board.
  • All types with more than four layers are collectively referred to as multilayer types.
  • It is known that all of these layers are chemically stable. You shouldn’t anticipate any issues, even if it is exposed to chemicals.
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Specifically Tailored to Your Needs

With PCBTok, you can affordably have your polyimide circuit boards

So that all your needs are easily met.

Polyimide PCB Production Details As Following Up

NO Item Technical Specification
Standard Advanced
1 Layer Count 1-20 layers 22-40 layer
2 Base Material KB、Shengyi、ShengyiSF305、FR408、FR408HR、IS410、FR406、GETEK、370HR、IT180A、Rogers4350、Rogers400、PTFE Laminates(Rogers series、Taconic series、Arlon series、Nelco series)、Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
3 PCB Type Rigid PCB/FPC/Flex-Rigid Backplane、HDI、High multi-layer blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
4 Lamination type Blind&buried via type Mechanical blind&burried vias with less than 3 times laminating Mechanical blind&burried vias with less than 2 times laminating
HDI PCB 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating 1+n+1,1+1+n+1+1,2+n+2,3+n+3(n buried vias≤0.3mm),Laser blind via can be filling plating
5 Finished Board Thickness 0.2-3.2mm 3.4-7mm
6 Minimum Core Thickness 0.15mm(6mil) 0.1mm(4mil)
7 Copper Thickness Min. 1/2 OZ, Max. 4 OZ Min. 1/3 OZ, Max. 10 OZ
8 PTH Wall 20um(0.8mil) 25um(1mil)
9 Maximum Board Size 500*600mm(19”*23”) 1100*500mm(43”*19”)
10 Hole Min laser drilling size 4mil 4mil
Max laser drilling size 6mil 6mil
Max aspect ratio for Hole plate 10:1(hole diameter>8mil) 20:1
Max aspect ratio for laser via filling plating 0.9:1(Depth included copper thickness) 1:1(Depth included copper thickness)
Max aspect ratio for mechanical depth-
control drilling board(Blind hole drilling depth/blind hole size)
0.8:1(drilling tool size≥10mil) 1.3:1(drilling tool size≤8mil),1.15:1(drilling tool size≥10mil)
Min. depth of Mechanical depth-control(back drill) 8mil 8mil
Min gap between hole wall and
conductor (None blind and buried via PCB)
7mil(≤8L),9mil(10-14L),10mil(>14L) 5.5mil(≤8L),6.5mil(10-14L),7mil(>14L)
Min gap between hole wall conductor (Blind and buried via PCB) 8mil(1 times laminating),10mil(2 times laminating), 12mil(3 times laminating) 7mil(1 time laminating), 8mil(2 times laminating), 9mil(3 times laminating)
Min gab between hole wall conductor(Laser blind hole buried via PCB) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2) 7mil(1+N+1);8mil(1+1+N+1+1 or 2+N+2)
Min space between laser holes and conductor 6mil 5mil
Min space between hole walls in different net 10mil 10mil
Min space between hole walls in the same net 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB) 6mil(thru-hole& laser hole PCB),10mil(Mechanical blind&buried PCB)
Min space bwteen NPTH hole walls 8mil 8mil
Hole location tolerance ±2mil ±2mil
NPTH tolerance ±2mil ±2mil
Pressfit holes tolerance ±2mil ±2mil
Countersink depth tolerance ±6mil ±6mil
Countersink hole size tolerance ±6mil ±6mil
11 Pad(ring) Min Pad size for laser drillings 10mil(for 4mil laser via),11mil(for 5mil laser via) 10mil(for 4mil laser via),11mil(for 5mil laser via)
Min Pad size for mechanical drillings 16mil(8mil drillings) 16mil(8mil drillings)
Min BGA pad size HASL:10mil, LF HASL:12mil, other surface technics are 10mil(7mil is ok for flash gold) HASL:10mil, LF HASL:12mil, other surface technics are 7mi
Pad size tolerance(BGA) ±1.5mil(pad size≤10mil);±15%(pad size>10mil) ±1.2mil(pad size≤12mil);±10%(pad size≥12mil)
12 Width/Space Internal Layer 1/2OZ:3/3mil 1/2OZ:3/3mil
1OZ: 3/4mil 1OZ: 3/4mil
2OZ: 4/5.5mil 2OZ: 4/5mil
3OZ: 5/8mil 3OZ: 5/8mil
4OZ: 6/11mil 4OZ: 6/11mil
5OZ: 7/14mil 5OZ: 7/13.5mil
6OZ: 8/16mil 6OZ: 8/15mil
7OZ: 9/19mil 7OZ: 9/18mil
8OZ: 10/22mil 8OZ: 10/21mil
9OZ: 11/25mil 9OZ: 11/24mil
10OZ: 12/28mil 10OZ: 12/27mil
External Layer 1/3OZ:3.5/4mil 1/3OZ:3/3mil
1/2OZ:3.9/4.5mil 1/2OZ:3.5/3.5mil
1OZ: 4.8/5mil 1OZ: 4.5/5mil
1.43OZ(positive):4.5/7 1.43OZ(positive):4.5/6
1.43OZ(negative ):5/8 1.43OZ(negative ):5/7
2OZ: 6/8mil 2OZ: 6/7mil
3OZ: 6/12mil 3OZ: 6/10mil
4OZ: 7.5/15mil 4OZ: 7.5/13mil
5OZ: 9/18mil 5OZ: 9/16mil
6OZ: 10/21mil 6OZ: 10/19mil
7OZ: 11/25mil 7OZ: 11/22mil
8OZ: 12/29mil 8OZ: 12/26mil
9OZ: 13/33mil 9OZ: 13/30mil
10OZ: 14/38mil 10OZ: 14/35mil
13 Dimension Tolerance Hole Position 0.08 ( 3 mils)
Conductor Width(W) 20% Deviation of Master
1mil Deviation of Master
Outline Dimension 0.15 mm ( 6 mils) 0.10 mm ( 4 mils)
Conductors & Outline
( C – O )
0.15 mm ( 6 mils) 0.13 mm ( 5 mils)
Warp and Twist 0.75% 0.50%
14 Solder Mask Max drilling tool size for via filled with Soldermask (single side) 35.4mil 35.4mil
Soldermask color Green, Black, Blue, Red, White, Yellow,Purple matte/glossy
Silkscreen color White, Black,Blue,Yellow
Max hole size for via filled with Blue glue aluminium 197mil 197mil
Finish hole size for via filled with resin  4-25.4mil  4-25.4mil
Max aspect ratio for via filled with resin board 8:1 12:1
Min width of soldermask bridge Base copper≤0.5 oz、Immersion Tin: 7.5mil(Black), 5.5mil(Other color) , 8mil( on copper area)
Base copper≤0.5 oz、Finish treatment not Immersion Tin : 5.5 mil(Black,extremity 5mil), 4mil(Other
color,extremity 3.5mil) , 8mil( on copper area
Base coppe 1 oz: 4mil(Green), 5mil(Other color) , 5.5mil(Black,extremity 5mil),8mil( on copper area)
Base copper 1.43 oz: 4mil(Green), 5.5mil(Other color) , 6mil(Black), 8mil( on copper area)
Base copper 2 oz-4 oz: 6mil, 8mil( on copper area)
15 Surface Treatment Lead free Flash gold(electroplated gold)、ENIG、Hard gold、Flash gold、HASL Lead free、OSP、ENEPIG、Soft gold、Immersion silver、Immersion Tin、ENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finge
Leaded Leaded HASL
Aspect ratio 10:1(HASL Lead free、HASL Lead、ENIG、Immersion Tin、Immersion silver、ENEPIG);8:1(OSP)
Max finished size HASL Lead 22″*39″;HASL Lead free 22″*24″;Flash gold 24″*24″;Hard gold 24″*28″;ENIG 21″*27″;Flash gold(electroplated gold) 21″*48″;Immersion Tin 16″*21″;Immersion silver 16″*18″;OSP 24″*40″;
Min finished size HASL Lead 5″*6″;HASL Lead free 10″*10″;Flash gold 12″*16″;Hard gold 3″*3″;Flash gold(electroplated gold) 8″*10″;Immersion Tin 2″*4″;Immersion silver 2″*4″;OSP 2″*2″;
PCB thickness HASL Lead 0.6-4.0mm;HASL Lead free 0.6-4.0mm;Flash gold 1.0-3.2mm;Hard gold 0.1-5.0mm;ENIG 0.2-7.0mm;Flash gold(electroplated gold) 0.15-5.0mm;Immersion Tin 0.4-5.0mm;Immersion silver 0.4-5.0mm;OSP 0.2-6.0mm
Max high to gold finger 1.5inch
Min space between gold fingers 6mil
Min block space to gold fingers 7.5mil
16 V-Cutting Panel Size 500mm X 622 mm  ( max. ) 500mm X 800 mm ( max. )
Board Thickness 0.50 mm (20mil) min. 0.30 mm (12mil) min.
Remain Thickness 1/3 board thickness 0.40 +/-0.10mm( 16+/-4 mil )
Tolerance ±0.13 mm(5mil) ±0.1 mm(4mil)
Groove Width 0.50 mm (20mil) max. 0.38 mm (15mil) max.
Groove to Groove 20 mm (787mil) min. 10 mm (394mil) min.
Groove to Trace 0.45 mm(18mil) min. 0.38 mm(15mil) min.
17 Slot Slot size tol.L≥2W PTH Slot: L:+/-0.13(5mil) W:+/-0.08(3mil) PTH Slot: L:+/-0.10(4mil) W:+/-0.05(2mil)
NPTH slot(mm) L+/-0.10 (4mil) W:+/-0.05(2mil) NPTH slot(mm) L:+/-0.08 (3mil) W:+/-0.05(2mil)
18 Min Spacing from hole edge to hole edge 0.30-1.60 (Hole Diameter) 0.15mm(6mil) 0.10mm(4mil)
1.61-6.50 (Hole Diameter) 0.15mm(6mil) 0.13mm(5mil)
19 Min spacing between hole edge to circuitry pattern PTH hole: 0.20mm(8mil) PTH hole: 0.13mm(5mil)
NPTH hole: 0.18mm(7mil) NPTH hole: 0.10mm(4mil)
20 Image transfer Registration tol Circuit pattern vs.index hole 0.10(4mil) 0.08(3mil)
Circuit pattern vs.2nd drill hole 0.15(6mil) 0.10(4mil)
21 Registration tolerance of front/back image 0.075mm(3mil) 0.05mm(2mil)
22 Multilayers Layer-layer misregistration 4layers: 0.15mm(6mil)max. 4layers: 0.10mm(4mil) max.
6layers: 0.20mm(8mil)max. 6layers: 0.13mm(5mil) max.
8layers: 0.25mm(10mil)max. 8layers: 0.15mm(6mil) max.
Min. Spacing from Hole Edge to Innerlayer Pattern 0.225mm(9mil) 0.15mm(6mil)
Min.Spacing from Outline to Innerlayer Pattern 0.38mm(15mil) 0.225mm(9mil)
Min. board thickness 4layers:0.30mm(12mil) 4layers:0.20mm(8mil)
6layers:0.60mm(24mil) 6layers:0.50mm(20mil)
8layers:1.0mm(40mil) 8layers:0.75mm(30mil)
Board thickness tolerance 4layers:+/-0.13mm(5mil) 4layers:+/-0.10mm(4mil)
6layers:+/-0.15mm(6mil) 6layers:+/-0.13mm(5mil)
8-12 layers:+/-0.20mm (8mil) 8-12 layers:+/-0.15mm (6mil)
23 Insulation Resistance 10KΩ~20MΩ(typical:5MΩ)
24 Conductivity <50Ω(typical:25Ω)
25 Test voltage 250V
26 Impedance control ±5ohm(<50ohm), ±10%(≥50ohm)

PCBTok offers flexible shipping methods for our customers, you may choose from one of the methods below.

1. DHL

DHL offers international express services in over 220 countries.
DHL partners with PCBTok and offers very competitive rates to customers of PCBTok.
It normally takes 3-7 business days for the package to be delivered around the world.


2. UPS

UPS gets the facts and figures about the world’s largest package delivery company and one of the leading global providers of specialized transportation and logistics services.
It normally takes 3-7 business days to deliver a package to most of the addresses in the world.


3. TNT

TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
of our customers.


4. FedEx

FedEx offers delivery solutions for customers around the world.
It takes 4-7 business days to deliver the packages to the hands
of our customers.


5. Air, Sea/Air, and Sea

If your order is of large volume with PCBTok, you can also choose
to ship via air, sea/air combined, and sea when necessary.
Please contact your sales representative for shipping solutions.

Note: if you need others, please contact your sales representative for shipping solutions.

You can use the following payment methods:

Telegraphic Transfer(TT): A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions. It’s very convenient to transfer.

Bank/Wire transfer: To pay by wire transfer using your bank account, you need to visit your nearest bank branch with the wire transfer information. Your payment will be completed 3-5 business days after you have finished the money transfer.

Paypal: Pay easily, fast and secure with PayPal. many other credit and debit cards via PayPal.

Credit Card: You can pay with a credit card: Visa, Visa Electron, MasterCard, Maestro.

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    Tomas Barboza, Shipping Supervisor from Paysandú, Uruguay
  • “They even provided me with excellent service, going above and beyond what I requested! I’ll definitely use PCBTok again and recommend it to others. The detailing is truly exceptional, especially on my high-speed circuits. These guys are extremely thorough and meticulous, and their prices are very reasonable. beats the opposition without a doubt. You won’t regret purchasing from this reputable Chinese company, I assure you. What they claim to be true on their website.”

    Leo Côté, Business Development Manager from Quebec, Canada
  • “My business is persuaded to use PCBTok once more because they delivered on time, in contrast to the competitors who provided numerous justifications for delays. With them, I could not be happier. I contacted them and a few other stores online on a Friday night, when most businesses in my nation are closed, to ask if they could assist me on the weekend. They carried it out. Excellent, professional service that promptly resolved our company’s problem.”

    Wagner Evans, Logistics Supervisor from Sunderland, UK
Compare FR4 PCB and Polyimide PCB

High thermal resistance and high reliability materials are used in Polyimide PCB. These qualities are absent in FR4 material.

There are FR4 material that are high Tg, but only up to 180 degrees Celsius.

Some customers will opt for PTFE laminates for High Tg demands, if not using polyimide.

Polyimide types are also perfect for use in vehicle modules, power modules, and outer space devices.

These applications are not suitable to normal Tg FR4.

How Many Layers of Polyimide PCB is Possible?

Pick the polyimide material option that best suits your needs when considering the layers of flex PCB.

However, the majority of PCB mass producers can only produce polyimide PCB with up to 10 layers.

The most popular ones are 4 and 6 layers, which are used in telecom and medical products

Polyimide materials are not more difficult to incorporate into PCBs, regardless of quality.

Within 24 hours upon ordering, these Quick-Turn PCB may be made available.

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