Post #4099630

I was designing this 3 piece 27.5mm diameter camera board to be a rigid-flex PCB, but most PCB houses have trace/space limits of 4 mil on the rigid portion and limit blind vias to one layer deep, which causes challenges with BGAs. Also the 6L rigid flex stackups cause issues with 100 ohm differential traces being too wide. I think I'm going to look at just using very small board to board connectors. The Hirose DF40 20 pin looks promising. Any other recommendations? I'm looking for a board to board gap of about 3-5mm, and the fastest signals will be 2.5gbps MIPI. I'm going to check out Mill Max's website for tiny standoffs, but I can always 3d print something for prototyping.