5 Differences between Rigid PCB with Flex PCB

Rigid PCB : Rigid Printed Circuit Board     Flex PCB : Flexible Circuits

Rigid PCB VS Flex PCB

Rigid PCB VS Flex PCB

What is the flexible circuits?

What is The rigid circuit boards?

What is the difference between the two?

Flexible PCB Also known as flexible circuit boards,Is rolled with copper or Electrolytic copper as the material,Flexibility is very good, Bending resistance.

Normally we talk about PCB Called rigid board,

The FPC called the Flexible PCB.Small and medium-sized flexible circuits/s design follows Rigid circuit board design,

But not completely The same with rigid circuit board.Specific differences can be summarized as the following aspects:


1, softness


A standard for flexible circuit boards Is to require good flexibility,

Flexible printed circuit board Three-dimensional space is very important,Because of bending and flexible applications

Can save space and reduce the board layer,Mostly single-sided.Hard board material is Requirements more excellent,

With compression,Wear-resistant high temperature and other characteristics,So the limitations of the space,Common Multilayer PCB.


2, the carrying capacity of the line


Compared with the rigid circuit board,Flexible PCB is Poor,Anything from a straight line to a corner Or different line width changes,Should be smooth transition.We can see a lot Flex PCB with snake-like alignment. The same line width from the hard board Of the current carrying capacity

Much stronger than the soft board,So we common

Flexible PCB applications ,In the place of smaller current,Such as mobile phone cable.


3, the pad design


In the periphery of the pad,There is one from the flexible material Rigid material changes.Board This area is the soft board

More likely to damage the conductor.Therefore, the pads should be avoided In the region prone to bending.Rigid board does not need to emphasize this problem.


4, the shape of the plate


Regardless of the soft board hard board

Shape will be a variety of,

Flexible PCB in shape On the general preferred rectangle,So you can better save the substrate,Leave at the edge of the board

Enough free margins, In the shape,

General solution made of circular

Than the sharp inner angle is better,

The inner solution of the light shape is easy

Causing the plate to tear.

Rigid board is a fixed mode,

Depending on the shape of the product.


5, the thickness of the board


FPC is thinner than Rigid board,

Conventional hard board thinnest to do

To 0.2mm has been very good,

While the flexible pcb Can be thinner than paper,

So in many areas or

There is a good space for development.

From the above can see the Flex PCB

And Rigid boards are different,

Each have their own fields.