[PCB_FORUM] AMC format

Hey guys,

 

I'm doing an Advanced Mezzanine Card (AMC) format design and have a few
questions.

 

This format has an edge connector on one end with a strange contact
pattern.

As opposed to the normal (i.e. PCI) edge connector fingers (all the
same), this format has some two part fingers that connect sooner or
later than others (see diagram below).

 

My first question is about creating the pads/symbol for this edge
connector: as far as the two part padstack fingers (Second, Third & Last
Mates), how would you create them?

 

My second question is concerning gold plating this strange finger
pattern.  It seems to me that the only way is "selective plating", as
opposed to the normal edge connector plating process, correct?

 

We're in a state of flux right now, not sure which fab house to ask, so
I thought I'd ping you guys.



Thanks for any responses!

 

 

 

 

Gary E. MacIndoe

PCB Design Engineer

Advanced Micro Devices

Longmont, Colorado

JPEG image

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