FPC Flexible Circuit board, full known as Flexible Printed Circuit, is a circuit board made of heterogeneous flexible materials. Compared with traditional rigid circuit boards, FPC flexible circuit boards have the advantages of higher shock resistance, bendability and light weight.

1. Production process

1. Material preparation: In the production process of FPC flexible circuit board, it is necessary to prepare flexible substrate, conductive layer, insulating layer and other materials. Polyimide films are commonly used for flexible substrates, copper foil is used for conductive layers, and polyimide films are commonly used for insulating layers.

2. Printing: The conductive layer material is applied to the flexible substrate through the printing process to form the required line pattern. The equipment used for printing is flat press, rotary press and so on.

3. Etching: The printed conductive layer material is etched to remove the unwanted part and leave the required line.


4. Copper foil stripping: The bonding layer between the etched conductive layer and the flexible substrate is stripped to make the circuit board softer.

5. Positioning hole drilling: According to the requirements, the positioning hole is drilled on the FPC flexible circuit board to facilitate the positioning in the subsequent process.

6. Processing: According to the design requirements, bend, shear and other processing technology, FPC flexible circuit board is made into the required shape.

7. Complete testing: electrical testing, reliability testing and other tests are carried out on the completed FPC flexible circuit board to ensure product quality meets requirements.

2. Application field

1. Consumer electronics: FPC flexible circuit boards are widely used in consumer electronics products, such as mobile phones, tablet computers, digital cameras, etc. Its flexible and lightweight characteristics make consumer electronics more portable.


2. Automotive electronics: FPC flexible circuit boards also have a wide range of applications in the field of automotive electronics, such as car dashboards, navigation systems, vehicle multimedia, etc. Its vibration resistance and high temperature resistance make FPC flexible circuit boards more reliable in automotive electronic systems.

3. Medical equipment: FPC flexible circuit board is widely used in medical equipment, such as electrocardiograph, blood pressure monitor, thermometer, etc. Its flexible and foldable properties make medical devices more user-friendly and easy to carry and use.

4. Industrial control: FPC flexible circuit boards play an important role in the field of industrial control, such as robot control, automated production lines, etc. Its flexibility and plasticity allow FPC flexible boards to adapt to the needs of different shapes and complex environments.

Category	Description	Capability
Layers	Including Rigid and  Flexible Circuit	1layer~6layer
Pable Size	Max	500x550mm
Drilling Diameter	Min Diameter	0.15mm
	Max Diameter	6.5mm
Base Material  Copper Thickness	Min	1/3oz
	Max	≥3oz
Insulating Layer  Thickness	Min	0.0125mm（PI 0.5mil）
	Max	0.05mm（PI 2mil）
Electroplating Sn/Pb  Thickness	Range	3um~20um
Electroplating Au  Thickness	Min	≥0.05um
Chemical Immersion  Ni/Au Thickness	Range	0.05um~0.1um
Electroplating Sn  Thickness	Range	3um~20um
Etching Line  Width&Space	Width	1mil
	Special Width	2mil
Etching Tolerance	Width	±10%
	Special Width	±10%
Outling Tolerance (from side to side)	Min	±0.05mm
Parts Fixed Position  Tolerance	Min	±0.2mm
Product Catalog  Surface Finish	Electrical/immersion  Ni&Au Plating Board	-
	Electrical/immersion  Tin Plating Board	-
	OSP Board	-