I have created a board that has a 0.8mm pitch 10+10 pin dual sided card edge connector (fingers). The PCB was designed with pads and board outline exactly to the specs of the data sheet. I have manufactured the device with the card edge fingers and the interface board that contains the connector with skillet reflow, and after getting rid of some bridges it seems successful.
Now to the questions:
- I chose OSHPark for the boards as they provide a gold plated finish on the pads. These devices will not be connected and disconnected very often. However since I am at the prototype stage writing firmware, there are more connects and disconnects than usual, which made me start thinking about wear. So is it common to manufacture pads for the card edge fingers with enhanced plating that make them more resistant to wear, or is the standard gold plating I am getting from OSHPark regarded as adequate for this purpose? If enhanced plating was needed, who would provide the service and how is it specified?
- The fingers were designed with with a cutout in the place of two pads for keying. However I could not find any keys to insert into this rather small card edge connector at Digikey or at the 3M site. Does anyone have some clever tips to how to make a key and keep it in place? (The one I made from a board piece quickly fell out.) I sort of hesitate using epoxy or other glue in the card edge connector to keep the key in place…