Electronics Forum | Sat Jun 02 08:47:25 EDT 2007 | mika
I almost forgot; If the pcb have HASL (Non RoHS) surface finish, then big fine pitch QFP:s could be shifted during reflow, beacuse of the un-even pad-surface... We have been trough that scenario also... But step No.1 is to make sure that the componen
Electronics Forum | Sat Aug 28 14:23:52 EDT 1999 | JohnW
| Hi There, | | Could anyone please give me some pointers on screen printing non-conductive adhesives or where I could find the information avaliable. Aspects such as printing parameters, ideal stencil design and a general overview. Do already have
Electronics Forum | Mon May 06 12:44:50 EDT 2002 | Bob Willis
The SMART Group is starting a new project on PPM Monitoring which will be providing average PPM yield data per month free to the industry. I would like to get feedback or exchange criteria for paste printing as non exists with in IPC or similar organ
Electronics Forum | Thu Aug 06 09:51:20 EDT 1998 | Bob Willis
This text may be of interest to any one with tin lead spots Guide to Solder Spots - A New Plague in Manufacture ? So what are solder spots ? They appear to be the next big problem in modern reflow assembly in fact in any process that involves solder
Electronics Forum | Mon Jan 28 08:07:44 EST 2002 | JohnW
Sorry I keep forgetting you lot are backwards in the old metric system :0) anyhoo, yes IPC, the bastions of right well as long as your board is only 1.6mm thick (sorry 62mils)say that you need 75% min general and 50% on ground planes. I'd like to se
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