Brief Introduction of FPC
Flexible Printed Circuit Board (FPC) is referred to as "soft board". In the industry, FPC is
A printed circuit board made of flexible insulating substrate (mainly polyimide or polyester
Film), which has many advantages that rigid printed circuit boards do not have. for example,
It can be freely bent, wound, folded. the volume of electronic products can be greatly reduced
by using FPC, which is suitable for the development of electronic products in the direction of
High density, miniaturization and high reliability. Therefore, FPC has been widely used in
Aerospace, military, mobile communication, laptop, computer peripherals, PDA, digital
Camera and other fields or products.

FPC also has the advantages of good heat dissipation,
Solderability, easy mounting and low cost.

Flexible printed circuit board has one layer, two layers and multilayer board. the base material
Is polyimide clad laminate. this kind of material has high heat resistance and good dimensional
Stability. It is the final product through pressing with the coating film which has both mechanical
Protection and good electrical insulation. the surface and inner conductors of double-sided and
Multi-layer printed circuit boards are metallized to realize the electrical connection of inner and
Outer layers.

the function of flexible circuit board can be divided into four kinds, namely, lead line, printed
Circuit, connector and multifunction integrated system, which cover computer, computer
Peripheral auxiliary system, consumer household electrical appliance and automobile, etc.



FPC Case: 2 Layer Flexible PCB (FPC) Built on Polyimide
with FR4 Stiffener for Embedded Systems Programming
(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 Embedded Systems Programming.

Basic specifications
Base material: Polyimide 25m + 0.2mm stiffener of FR-4
Layer count: 2 layers
Type: Individual FPC
Format: 106mm x 69.5mm = 1 type = 1 piece
Surface finish: Immersion gold
Copper weight: Outer layer 35 m/ Inner layer 0 m
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
the end can be whole soldered;
Low cost;
Continuity of processing;
Excellent surface planarity to reduce failure rate during assembly and soldering;
Right manufacturing instruction (MI);
Strict WIP inspection and monitoring as well as working instruction;
Competitive price;
on-time service;
More than 15 years of PCB experience;

Application
Toy lamp strip, Tablet PC capacitive screen soft board,Medical keypad soft board,
Automobile sensor flex board, mobile phone built-in antenna FPC,Consumer ETC
(Electronic Toll Collection) soft board

General Properties of Single Sided FCCL

Test Item		Treatment Condition	Unit	Property Date
				IPC Standard * value	Typical Value
					SF201 0512SE	SF201 0518SR
Peel Strength (90)		A	N/mm	0.525	1.0	0.9
		288, 5s		0.525	1.0	0.9
Folding Endurance (MIT)		R0.8 X 4.9N	Times	-	10000	10000
Thermal Stress		288, 20s	-	-	No Delamination	No Delamination
Dimensional Stability	MD	E-0.5/150	%	0.2	0.1	0.1
	TD				0.1	0.1
Chemical Resistance		after Chemical Exposure	%	80	90	90
Dielectric Constant (1MHz)		C-24/23/50	-	4.0	3.2	3.2
Dissipation Factor (1MHz)		C-24/23/50	-	0.01	0.008	0.008
Volume Resistvitiy		C-96/35/90	M-cm	10^6	4.5 x 10^8	4.5 x 10^8
Surface Resistance		C-96/35/90	M	10^5	3.0 x 10^6	3.0 x 10^6

Explanations:
C = Humidity conditioning;
E = Temperature conditioning;
* Certified to IPC-4204/11 Copper Clad Adhesiveless Polyimide

Product Code Description
SF201 05 12 S E
SF201: Shengyi Adhesiveless FCCL Designation
05: PI Film Thickness, 05- 12.5m; 08-20m
12: Copper Foil Thickness, 12-12m, 18-18m
S: Single Sided
E- ED copper; R- RA Copper


FPC

Developing line