Electronics Forum | Mon Nov 12 13:04:35 EST 2001 | slthomas
We've got a problem with a fine pitch board that has about .005" registration error at each end (towards the center of the board) when it's printed. Apparently we've got a case of board stretch generated at the fab shop. I still have to do some mea
Electronics Forum | Mon Nov 12 17:12:40 EST 2001 | slthomas
Thanks, Dave. Three courtesy cheers for specifications written to reflect the capabilities of the part suppliers, even if they fail to meet the purchaser's (not unreasonable) process req'ts. In the meantime, I'm sure my stencil guy would be more
Electronics Forum | Mon Nov 12 16:14:47 EST 2001 | davef
Yes!!! How can we assemble boards with 20 pitch when we allow 0.008� error to the master art? Excellent question!!! IPC-D-300G has nothing to do with assembler requirements. It is written by and for fabricators, so that they can be comfortable.
Electronics Forum | Thu Aug 23 12:23:51 EDT 2001 | mkallen
I don't see anything in IPC-6012A specifically about stretch. Maybe paragraph 3.4 (Board Dimensional Requirements) applies, which tells me I need my own drawing note. Crafting this note could be tricky, and I was hoping that someone has already tac
Electronics Forum | Tue Sep 01 17:44:46 EDT 2015 | abisson
Hello to All, Is someone can refer me to an IPC standard where the maximum allowance of pcb stretch is mention? I've look into IPC-600, or 2222 or 2615 and I cannot find what I'm looking for. I will like to implement a pass/fail incoming inspection
Electronics Forum | Tue Apr 10 20:54:09 EDT 2007 | raychamp007
Dear Friend, Can any one explain what is 'toe down configuration' stated in 188.8.131.52 IPC-A-610D? Can any one here to explain in more details. Thanks
Electronics Forum | Wed Aug 22 19:54:54 EDT 2001 | mkallen
Can anyone point me to a relevant IPC spec that specifies an allowable board stretch, measured between metal features on outer layers (e.g., between fiducials and component pads on the topside of a board)? I've got a non-linear stretch problem that'