Electronics Forum | Sat Mar 28 12:04:24 EDT 2009 | davef
Bound books with concise information on SMT implementation are: * A compilation of "Step By Step" articles from SMT Magazine: http://www.booknews.co.uk/Books/Book4490.html * Setting Up In-House Surface Mount Technology [Books], Schoch, K.F., Jr., El
Electronics Forum | Fri Mar 28 00:56:50 EST 2003 | iman
we have a issue of post-reflow oven (SMT) soldering defects of blowholes and pinholes. Any suggestions or knowledge on root cause is appreciated to be share? BACKGROUND : we DI water wash and oven bake the PCB bareboards at 90deg-C for 60mins, to r
Electronics Forum | Sun Mar 30 20:21:44 EST 2003 | iman
we are using a "recommend supplier profile", and we have gotten back to the talking table with them over this profile specs. Thanks for the pointer, have ask them on this issue. Have also asked for their phase-transistion diagram to understand their
Electronics Forum | Sat Mar 29 01:59:09 EST 2003 | iman
Yep, only the MLF have this blowhole/pinhole issue. Other components like SOT(transistor), CAP, RES are hey-o-kie. Btw, MLF = micro lead frame (IC/LGA) package. looks like a BGA without the solder balls. has direct attachment to the PCB ENIG pads wi
Electronics Forum | Sat Mar 21 09:09:40 EDT 2009 | davef
Your puzzlement about blowholes in PTH solder connections during reflow soldering comes from: * Boards are hydroscopic. So, moisture content of the board is uniform. * Gold plating is uniform. * Nickle plating is uniform. * Copper plating on your PTH
Electronics Forum | Fri Jul 11 08:24:58 EDT 2008 | ev
We are a small prototype small volume shop looking at getting more work that involves placing BGA's. What are the concerns or issues that we should be focusing on. We have an ABW 10 zone oven and a Mydata TP11-UFP with a SMT techniques stencil printe
Electronics Forum | Thu Dec 23 15:29:48 EST 1999 | Glen Robertson
Mike - I'm not in the EMS business, but I suspect most of them are very reluctant to reveal much about their quoting process. You might want to try some of the third-party data suppliers like Ceeris (www.ceeris.com), and you can also check the C
Electronics Forum | Fri Mar 28 13:22:19 EST 2003 | ksfacinelli
Could you be having outgasing from the melf?
Electronics Forum | Sun Mar 30 20:13:39 EST 2003 | iman
MK, this is a bad link, can help re-verify this link pls?
Electronics Forum | Wed Apr 09 09:48:49 EDT 2003 | iman
after oven bake dry the PCB, we process within 4-hrs, else need to rebake again under same baking parameter. taking a look, the exact pads with the blowholes are full ENIG pads with no via holes under the solder-intend land areas. In event there is
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