Active Member
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[China]
Address: 6-11C Shidai Jingyuan Fuyong Town, Baoan District, Shenzhen City, Guangdong Province, China
Contact name:Sally Mao
Shenzhen Bicheng Electronics Technology Co., Ltd |
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Dual Layer Flexible Printed Circuit PCB (FPC) Built on Polyimide
With Stiffener for PLC Automation
(Flexible printed circuits are custom-made products, the picture
and parameters shown are just for reference)
General description
This is a type of 2 Layer flexible printed circuit (FPC) built on
polyimide for the application of PLC Automation.
Basic specifications
Base material: Polyimide 25μm + polyimide stiffener +3M sticker
Layer count: 2 layers
Type: Individual FPC
Format: 93mm x 44mm = 1 type = 1 piece
Surface finish: Immersion gold
Copper weight: Outer layer 35 μm/ Inner layer 0 μm
Solder mask / Legend: Yellow coverlay / No.
Final PCB height: 0.20 mm
Standard: IPC 6012 Class 2
Packing: 100 pieces are packed for shipment.
Lead time: 10 working days
Shelf life: 6 months
Features and benefits
Reliability increased;
Controllability of electrical parameter design;
Good oxidation resistance and good heat dissipation;
Powerful PCB capabilities support your research and development,
sales and marketing;
Delivery on time higher than 98% on-time-delivery rate;
Quick CADCAM checking and free PCB quotation;
8000 types of PCB's per month;
Applications
industrial control touch remote control soft board, Tablet PC
module soft board, mobile phone module flex board, Consumer
electrostatic Bracelet soft board, capacitive touch screen / panel,
medical equipment controller
Flexible Printed Circuit (FPC) Capability 2021
| 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 |
Components of a flexible circuit
A flexible circuit consists of copper foil, dielectric substrate+
coverlay and adhesive.
Copper foil is available in two different types of copper: ED
Copper and RA copper.
ED copper is an electro-deposited (ED) copper foil produced in the same way
as the copper foil used for rigid printed circuit boards. This also
means that the copper is “treated”, i.e., it has a slightly rough
surface on one side, which ensures a better adhesion when the
copper foil is bonded to the base material.
RA copper is a rolled and annealed copper foil produced from
electrolytically deposited cathode copper, which is melted and cast
into ingots. The ingots are first hot-rolled to a certain size and
milled on all surfaces. The copper is then cold-rolled and
annealed, until the desired thickness is obtained.
Copper foil is available in thickness of 12, 18, 35 and 70 μm.
The most common available for dielectric substrate and coverlay is polyimide films. This material can also be used as
coverlay. Polyimide is best suited for flexible circuits because of
its characteristics as stated below:
High temperature resistance allows soldering operations without
damaging the flexible circuits
Very good electrical properties
Good chemical resistance
Polyimide is available in thicknesses of 12.5, 20, 25 and 50 μm.
Base laminates for rigid printed circuit boards are copper foils
laminated together with the base materials, the adhesive coming from the prepreg material during lamination. Contrary to
this is the flexible circuit where the lamination of the copper
foil to the film material is achieved by means of an adhesive
system. It is necessary to distinguish between two main systems of
adhesive, namely thermoplastic and thermoset adhesives. The choice
is dictated partly by the processing, and partly by the application
of the finished flexible circuit.
