Thanks Ron! I appreciate it.
I've never heard the term. What does it mean?
I'm impressed, this thread has the #1 spot on Google for 'punch and retain'. Nice job Mentor!
It's a process of fabricating PCB's without drill or route. They build a hard tool and punch out the boards. They then push it back into the panel. It's usually done with CEM-1 or CEM-3 material (doesn't have woven glass in the core).