Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Adam Seychell <a_seychell@...> writes:

> I'm wondering what other people are doing out there for PCB that use
> SMD.

I normally use 0603 and SSOP/TSSOP sizes, with either SOT-23 or
SOT-323 depending on power need.

I've done down to 01005 (8x16 mil) and VSSOP (0.4mm pitch) with toner
transfer.

http://www.delorie.com/pcb/first.html
http://www.delorie.com/pcb/smd-challenge/
http://www.delorie.com/pcb/smd-challenge/old/proto-boards.html

> Luckily, only the really big chips are BGA.

The really small chips are CSP, which have similar type of issues as
BGA.

> I use photomasks from a inkjet printer.

I can do down to 6.7 mil (four dots wide) reliably with toner
transfer.