Electronics Forum | Tue Jul 15 18:44:20 EDT 2003 | davef
Sam says, �The only question remaining to me is that why the failure happened after 48 hours instead of immediate failure after soldering.� Let�s recap: * Had good-looking solder flow. * Passed the initial electrical test. * Failed the later electri
Electronics Forum | Mon Mar 01 12:50:47 EST 1999 | justin medernach
| Hello! SMT professionals, | | I do not know if anyone posted this question before. | Last week, I reflowed our newly designed thin Rigid-Flex pcb with 0.040" thickness. I found all of pins of a TQFP48 ic did not get wetted. I could see on the hee
Electronics Forum | Fri Feb 12 14:06:28 EST 1999 | Craig Lowe
Bill, I would go with the second piece of advice by leaving a little film of solder paste on the screen. This is good advise if you are using a lookup/look down type of vision centering. Like on MPM and newer Fuji. On older Fuji GSP2/3 style printer
Electronics Forum | Tue Dec 14 11:17:45 EST 1999 | John Thorup
Hello Mike You'll have to be a bit more specific. Do you mean permanent solder mask like the normally green material or a temporary mask like the peelable/washable material? John Thorup
Electronics Forum | Wed Aug 13 09:50:32 EDT 2008 | diesel_1t
Hi dave, thanks for your reply I tried to locate "Techni-Tool 872M1034" on the webpage but I found: https://webvia.techni-tool.com/VIA/viaImagePageIndex.jsp?row=3&pgName=viaListProducts.jsp&searchText=CH8C&modifier=CH8C&reqTitle=TITLE_VIAUSERDOCLIST
Electronics Forum | Wed Oct 17 19:01:34 EDT 2001 | scott
We have a local shop here in S-Cal. called MaskTek that invented a solder deposition process that eliminates the need for solderpaste but you still need to use "sticky" flux. They license the process to various facilities around the country. Was pr
Electronics Forum | Wed Aug 18 16:26:21 EDT 1999 | Tony
Yesterday as I was creating a profile on a plastic BGA using Conceptronics freedom 2000 rework station, I happend to discover that I was able to remove solder bridging from a plastic BGA. This is what I did. Created a removal profile, I had a board
Electronics Forum | Wed Sep 05 08:23:24 EDT 2007 | realchunks
Hi Lloyd (did I just stutter?), While I do love Steve's response, I must add that solder is not a very strong metal. And technically, it's sole purpose is to provide an electrical connection. It's a bad choice for mechanical connections, yet every
Electronics Forum | Wed Aug 24 12:25:52 EDT 2005 | bman
We've been down this road before, and it doesn't have to be as expensive as it would seem. First, ask your board supplier for a solder sample of the board. They are likely to have a scrap board that you can use for your profiling. As for the BGA(s
Electronics Forum | Mon May 21 15:25:51 EDT 2012 | cbeneat
I'm having an issue with a particular board we run in our wave solder. it has a USB connector with 4 pins that are 3mm x3mm square. we are constantly getting abridge across at least two of the pins, but sometimes all 4. I've run out of ideas on ho
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