[SOLVED] Flex PCB to aluminium backed PCB

[samayanaya]

I was wondering if it would be possible link a FR4 PCB to a aluminium backed PCB using flex PCB? Can it actually be done? FR4 tot FR4 is fine but I am not sure if it is even possible to connect flex to aluminium backed. Anyone know how this would work or can be done?

 

[marce]

Probably, talk to some PCB manufacturers, it will cost of course.

 

[Linda.guo]

Normally, FR4 PCB can be linked to Aluminium based PCB with thermal sink Prepreg instead of Flex PCB , could you please advise me why you want to use flex PCB connecting FR4 PCB and aluminium PCB , Once you give more details, maybe we can give you more valuable suggestions on basis of PCB manufacturing experience .

 

[D.A.(Tony)Stewart]

The thermal resistance rises significantly compared to copper clad alum, but it is possible. Compare sq.cm per Watt. for 30'C jcn rise. and check/compare with sinkpad.com

 

[samayanaya]

Thank you. Cost will not be too much of a factor at this stage of the project as it is a prototype. That will get sorted with the engineering version. I just needed to figure out if it would be possible to get flec onto aluminium backed pcb.

Again thank you :thumbsup:

 

[FvM]

The question isn't exactly clear. Are you looking for a kind of rigid-flex-metalclad board with continuous traces connecting FR4 and metal-clad PCB? Or just soldering the flex strip to metal clad PCB?

I believe, flex-to-metalclad is possible, but it may involve some restrictions.