Electronics Forum | Fri Dec 15 14:42:35 EST 2006 | russ
we have has to alter some footprints to facilitate component rework/removal. We have some assemlies that have 2 oz and heavier copper, these boards require a lrger tip to melt solder so we have had to extend pads to allow the larger tips to touch pa
Electronics Forum | Thu Dec 28 22:58:30 EST 2006 | davef
If this is same TennRich Type B [ http://www.tennrich.com/trtw/TR_PI_Prod_Info.php?pid=2 ] that is an EMI gasket, it needs to be glued with a conductive adhesive. It has the same thermal capability as a Snickers Bar, about 90*C top end.
Electronics Forum | Mon Jan 08 12:37:30 EST 2007 | aj
Hi all, I posted a thread a while back looking for information from other Engineers regarding how they felt the whole "RoHS Compliance Introduction" had gone. I cant locate the thread - if anyone could add their experiences to this thread I would
Electronics Forum | Thu Feb 08 14:55:30 EST 2007 | pavel_murtishev
Good evening, I do. 2mil overprint is not critical. Paste will simply flow back. Paste flows back even with larger overprint (up to 15mil at least). 5mil stencil thickness if fine also. BGA area ratio for both BGAs is higher than 0.66 required by IP
Electronics Forum | Tue Feb 13 14:33:16 EST 2007 | CK the Flip
So the moral of the story is..... these SAC305 BGA's were accidentally mixed in with a Leaded process, the profile couldn't get hot enough due to Tg and Td constraints on a known good QFP on the same board, and consequently, the whole assembly fail
Electronics Forum | Thu Apr 12 08:48:35 EDT 2007 | stepheniii
It depends on the contract. Is it they build what they are told to build or they are saying they are building leadfree. And it's not the assembly or the part that has to be leadfree. It's the parts of the parts that have to be less than the given p
Electronics Forum | Mon May 14 17:11:48 EDT 2007 | russ
I am a CM, We do not use White tin either, we have had numerous solderability issues with this finish, We all agree when done correctly it is good, however I am at about 10% correct and 90% have issues. We currently use Immersion silver and Gold f
Electronics Forum | Thu Jul 05 16:06:56 EDT 2007 | petep
What process / equipment have you found to best mark Revision levels / date codes and such onto small areas on PC Boards? I need a repeatable, economic solution that will endure processing temps and saponifier in the cleaners. Have used RoHS co
Electronics Forum | Fri Aug 24 13:46:35 EDT 2007 | consultacionbc
I'm currently looking for a tool to be able to convert TH components to SMT. Looking at each datasheet is to time consuming, we will be needing to convert TH to SMT for a customer. Their bards have approx. 3000 parts TH. We've got the Arrow to find
Electronics Forum | Fri Oct 12 11:07:03 EDT 2007 | stepheniii
To get you started you might want to look at http://en.wikipedia.org/wiki/RoHS I think it's as good a place as any to get started. It has the basics explained in a straightforward manner. At the bottom of the page are external links they probably
