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Flex PCB Manufacturing Process

Flex Plus is an advanced manufacturing factory specializing in Flex PCB design and production. We combine innovative technology with a professional team to provide reliable and durable flexible circuit board solutions to customers around the world. Our rich manufacturing experience and strict quality control system ensure that each product meets international quality standards while meeting customer needs.

At Flex Plus, we follow a rigorous manufacturing process to ensure the precision and quality of each product.

The following is our complete Flex PCB production process:

copper foil cutting
CNC drilling machine
black hole for FPCB
plating copper
dry film layup of flex PCB production process

01

02

03

04

05

Cutting

CNC Drilling

Black Hole

Plating Copper

Dry Film Layup

exposure
DES
AOI
coverlay layup for printed circuit boards
flexible circuits coverlay lamination

06

07

08

09

10

Exposure

DES

AOI

Coverlay Layup

Coverlay Lamination

pretreatment
plating immersion
silk screen
stiffener PSA
CCD frilling

11

12

13

14

15

Pretreatment

Plating / Immersion

Silk Screen

Stiffener / PSA

CCD Drilling

OS testing
SMT
flex pcb board outline punching
flexible PCB quality control FQC
packing workshop

16

17

18

19

20

O/S Testing

SMT

Outline Punching

FQC / FQA

Packing

Quality Assurance

Flex Plus adopts a strict quality control process, covering every link from material selection to final product testing. Our flex PCB products meet  ISO certification standards to ensure the reliability and durability of each circuit board.

After-sales service

Flex Plus not only provides you with high-quality flexible circuit boards, but also provides perfect after-sales service. Whether it is technical support or product optimization, our team is always at your service to ensure your satisfaction.

Detailed steps of the process flow

Step 1: Design and material selection

​Design Stage: Work with customers to determine the specifications, number of layers, thickness, size and other details of the circuit board, and provide DFM (design for manufacturability) suggestions to optimize the design to ensure high efficiency and high quality of production.
Material selection: According to the specific requirements of the circuit board, select a suitable substrate (such as PI polyimide or PET polyethylene terephthalate) to ensure that the material has excellent flexibility and durability.

Step 2: Exposure and pattern transfer

Optical Exposure: Use advanced optical exposure technology to make precise circuit patterns on the copper clad layer. This process ensures high precision of the circuit board pattern.
Graphic transfer: Through the combination of dry film and wet film, the circuit pattern is transferred to the copper layer, laying the foundation for the next step of etching.

​​​​​Step 3: Etching and cleaning

Etching: Use chemical etching to remove the unprotected copper layer, leaving only the required circuit pattern.
Cleaning and inspection: Through high-pressure water cleaning and other technologies, remove residues and perform precise inspection to ensure the accuracy of the circuit pattern.

Step 4: Lamination and Punching

Lamination: Press multiple layers of materials together under high temperature and high pressure to achieve a stable connection between the layers.
Punching: Use advanced laser punching technology to prepare connection holes for the subsequent electroplating process.

​​​​Step 5: Electroplating and Pad Making

Electroplating: Electroplating the copper layer at the punching position to achieve electrical connection between layers.
Pad Making: Make pads to connect component solder joints to ensure the stability of electrical performance.

Step 6: Testing and Quality Control

Testing: Each flexible circuit board needs to undergo a series of electrical performance tests to ensure the connectivity, durability and electrical performance of each line.
Quality Control: Flex Plus has a complete quality inspection system to ensure that all products meet international standards and provide test reports according to customer needs.

Step 7: Finished Product Cutting and Packaging 

​​​Cutting: Precise cutting according to product specifications to obtain the final size.
Packaging:All finished products are treated with anti-static packaging to ensure safety and quality protection during transportation.

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