Rigid Flex PCB Design

[SivaprakashSivan]

I have designed two separate PCB for my client. After the first prototype, I found some issue to connect two PCB together. PCB constraints are very low to put connectors on the board. I want to design Rigid Flex PCB. I have done many boards in KiCAD but Rigid flex PCB is very new to me. I don’t to how to set constraints for the rigid flex PCB design. My previous design constraints are below.
First Board
Layer: 4 Layers
Dimensions: 13mm Dia Circle
Second Board
Layers: 2 Layers
Dimensions: 13mm Dia Circle
If anyone has done Rigid Flex PCB in KiCAD please help me on this.

Thank You

[davidsrsb]

Flux or Flex? I have used Flexi and rigid combinations on circular connectors

[SivaprakashSivan]

Sorry, It’s Rigid Flex PCB. And my design has two 13mm Dia Rigid PCBs. Right Now I am using 1.27 mm SMD pin for connecting two boards. I want to eliminate the 1.27mm pin by replacing Flex PCB for connecting two Rigid PCB’s.

[davidsrsb]

There are two good threads on flexi-rigid designs

Kicad For 4 Layer Rigid / 2 Layer Flex Design

Hi, I’m in the middle of using Kicad for a Rigid-Flex design. The stackup has four copper layers in the rigid regions and has two copper layers in the flex regions between the rigid regions – these correspond to the inner two layers of the rigid portions. [image] I thought Kicad would have no problem pulling this off, and I’m actually in the middle of my layout, until I realized that I’m trying to place a mezzanine connector on one of the flex regions, and for this I need exposed copper on on…

and

Method of work for generating rigid-flex design

Has anyone used Kicad for a rigid-flex design? Can anyone suggest a method of work, such as layer naming, layer alignment, etc? My conceptual design is a flexible circuit with a smaller 1 layer (copper on one side) rigid pcb adhered to the top of flex circuit. The top copper of the rigid board would be connected to the bottom copper of the flex circuit with a plated through hole. Note that there are only 3 layers of copper, not the typical 4. Since my top, rigid copper does not need to connec…

Have you found a supplier. Some of the details are very pcb fab specific.