Mar26
How to Design FPC-to-PCB Connections for Better Assembly (DFx)

post on March 26, 2026

How to Design FPC-to-PCB Connections for Better Assembly (DFx)

As electronic devices keep getting thinner and more compact, FPCs (flexible printed circuits) are used more and more. In some designs, FPCs even replace traditional PCBs. But no matter how advanced FPC technology becomes, it still needs to connect to a rigid PCB in the end—and most of the time, that interface is a connector. That’s why designing FPCs for manufacturability (DFx) is so important.

Early on, Workingbear thought FPC design was mainly about getting the layout right and choosing the correct stiffener thickness under the gold fingers or edge board contacts—making sure it’s not too thick to fit into the connector or too thin to stay secure.

read more…》

Connector, Design, Manufacture, PCB/FPC/PTF, Process     WorkingBear    Views (145)     comment (0)

Mar19
Why RA Copper Is Preferred Over ED Copper for FPC Applications?

post on March 19, 2026

RA銅的生產流程

Recently, our team ran into a painful issue: cracked traces on an FPC. The problem quickly escalated, tying up engineering resources and causing significant losses for the supplier as well. As often happens after a failure, an old debate resurfaced—should FPCs use Rolled & Annealed (RA) copper or Electro-Deposited (ED) copper?

read more…》

PCB/FPC/PTF     WorkingBear    Views (245)     comment (0)

Mar12
The Difference Between ED Copper and RA Copper in FPC

post on March 12, 2026

FPC

Modern electronic devices keep getting smaller, and that trend has driven the widespread use of Flexible Printed Circuit Boards (FPCs). One interesting thing about FPCs is that in many designs you can actually see the internal traces from the outside, which makes their structure relatively easy to understand.

If we take a single-layer FPC as an example, its structure is quite simple. It usually consists of a copper layer, with insulating cover films on the top and bottom. In some designs, a stiffener is also added to provide extra mechanical support. Because the structure looks simple, many engineers tend to overlook how important the copper foil itself really is.

read more…》

PCB/FPC/PTF, Product Introduction     WorkingBear    Views (170)     comment (0)

Mar10
FPC Structures — Single-Sided and Double Access Designs

post on March 10, 2026

FPC Structures — Single-Sided and Double Access Designs

FPCs (Flexible Printed Circuit Boards) can be categorized by their structure and complexity. Common types include single-layer, double-layer, and multi-layer flexible circuits. There is also a hybrid design called rigid-flex, which combines both flexible and rigid PCBs in the same structure.

read more…》

PCB/FPC/PTF, Product Introduction     WorkingBear    Views (156)     comment (0)

Mar04
What Is an FPC (Flexible Printed Circuit Board)?

post on March 4, 2026
What Is an FPC (Flexible Printed Circuit Board)?
Caption: The FPC is inserted into a connector on the PCB.

At a basic level, FPCs and PCBs are very similar in both function and structure. Whether it’s an FPC or a PCB, both use copper traces on the surface—and sometimes inside the board—to carry electrical signals.

The biggest difference between them lies in the base material.

A traditional PCB uses a glass-fiber–based substrate, which makes the board hard and rigid.
An FPC, on the other hand, is mainly made from polyimide (PI) or Polyester (PET). You can think of it as something closer to thick paper: flat, thin, flexible, and bendable.

read more…》

PCB/FPC/PTF, Product Introduction     WorkingBear    Views (440)     comment (0)