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Home Flexible Printed Circuit Flexible Printed Circuit FPC on PET with White Solder Mask

Flexible Printed Circuit FPC on PET with White Solder Mask

This is a type of dual layer flexible circuit built on PET substrate, 1oz copper weight on each layer. 

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  • Price Range:1 - 50/$1.9
  • Price Range:1 - 50/$99
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Flexible Printed Circuit FPC on PET with White Solder Mask

(Flexible printed circuits are custom-made products, the picture and parameters shown are just for reference)

General Information:

The FPC is coating with white solder mask and immersion gold on pads. The pads are bulged for the printer applications.

FPC Specifications:

PCB SIZE 172 x 145mm=1PCS
Base Material: PET
Number of Layers Double sided PCB
SMT n/a
Through Hole Components no
LAYER STACKUP Copper ------- 35um(1oz)
Copper ------- 35um(1oz)
Minimum Trace and Space: 4mil/8mil
Minimum /  Maximum Holes: 1.2mm/ 3.5mm
Final foil external:  1oz
Final foil internal:  0oz
Final height of PCB:  0.25mm ±0.05
Surface Finish Immersion gold
Solder Mask Apply To:  TOP, Bottom
Solder Mask Color:  White Coverlay
Stiffener: PET on back of gold finger area
Side of Component Legend NO
Colour of Component Legend NO
VIA Plated Through Hole(PTH)
TEST 100% Electrical Test prior shipment
TYPE OF ARTWORK TO BE SUPPLIED email file, Gerber RS-274-X, PCBDOC etc
SERVICE AREA Worldwide, Globally.


Features and Benefits:

Excellent flexibility;

Reduced PCB volume;

Reduced weight;

Increased reliability

Consistency of assembly;

More than 18+ years of PCB experience;

Customer complaint rate: <1%

Prototype capability;

Volume Production capability

Typical Applications:

Capacitive touch screen / panel, Industrial control temperature controller soft board, consumer card reader soft board

Covercoat / Solder Mask:

Solder mask in flexible PCB is different from rigid board, it is usually a polyimide film coated on one side with a semi-cured and non-tacky adhesive, we call it covercoat in flexible circuit. It is laminated to the flexible circuit under heat and pressure, so that the copper pattern is fully encapsulated except for the solder pads that are exposed through access holes in the covercoat.

The covercoat production sheet should be cut slightly smaller than the flexible circuit production sheet to avoid premature edge sealing, which could trap air bubbles in the package.

The production sheet for the covercoat is provided with tooling holes in close register with the tooling holes in the production sheet for the flexible circuit. The access holes are usually drilled, but in the case of high-volume production, punching is more cost-effective.

In principle, drilling of the covercoat is accomplished in the same way as when drilling rigid boards, i.e., a number of covercoat sheets are stacked, either 5-up or 10-up. The drilling parameters, however, are somewhat different, because of the polyimide material and the absence of copper foil, which otherwise could have removed some of the heat from the holes being drilled.

When drilling/punching large covercoat production sheets, it is necessary to compensate for the dimensional changes of the flexible circuit production sheet, which can amount to as much as 0.2%.

FPC Capabilities 2022:

No. Specifications Capabilities
1 Board Type Single layer, Doulbe layer, Multilayer, Rigid-Flex
2 Base Material PI, PET
3 Copper Weight 0.5oz, 1oz, 2oz
4 LED Maximum Size 250 x 5000mm
5 General Maximum Size 250 x 2000mm
6 Board Thickness 0.03mm-3.0mm
7 Thickness Tolerance ±0.03mm
8 Mininum Drill Hole 0.05mm
9 Maximum Drill Hole 6.5mm
10 Tolerance of Drill Hole ±0.025mm
11 Thickness of Hole Wall ≧8 um
12 Minimum Track/Gap of Single Layer Board 0.025/0.03mm
13 Minimum Track/Gap of Double Layer and Multilayer Board 0.03/0.040mm
14 Etching Tolerance ±0.02mm
15 Minimum Width of Silk Legend ≧0.125mm
16 Minimum Heigh of Silk Legend ≧0.75mm
17 Distance from Legend to Pad ≧0.15mm
18 Distance from Opening Solder Mask of Drill Coverlay to Track ≧0.03mm
19 Distance from Opening Solder Mask of Punching Coverlay to Track ≧0.03mm
20 Thickness of Immersion Nickel 100-300u"
21 Thickness of Immersion Gold 1-3u"
22 Thicnkess of Immersion Tin 150-400u"
23 Minimum Electrical Testing Pad 0.2mm
24 Minimum Tolerance of Outline(Normal Steel Mould Punch) ±0.1mm
25 Minimum Tolerance of Outline (Precision Steel Mould Punch) ±0.05mm
26 Mininum Radius of Bevel Angle (Outline) 0.2mm
27 Stiffner Material PI, FR-4, 3M Adhesive, PET, Steel Sheet
28 RoHs Yes
29 Solder Mask Colour Yellow, White, Black, Green

More Displays of White Flex:

White FPC pcb White FPC White FPC PCB




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