Electronics Forum | Wed Aug 20 18:07:13 EDT 2003 | davef
If you desire fairly uniform paste deposits, consider dispensing your solder paste. Neither a screen, nor a stencil will conform to the rough surface commonly seen in cast aluminum blocks, as you mention. Just out of curiosity: * What flux type and
Electronics Forum | Fri Aug 22 10:11:52 EDT 2003 | Stephen
An asteroid the size of texas is more likely to hit the earth than to get a BGA with one ball at the absolute max and another at the absolute minimum. The manufacturer is going to give themselves some leaway. What are you going to do about the more
Electronics Forum | Fri Aug 22 17:12:40 EDT 2003 | Stephen
read the other messages. I havn't seen this problem nor have I even heard of anyone seeing this problem. If anyone else has seen this on unreflowed BGA's I would love to hear it. At first I thought you meant that your QA department was finding the pr
Electronics Forum | Thu Nov 06 07:54:50 EST 2003 | davef
First, skewing is a perfectly acceptable condition, providing the amount of skewing is not excessive. A-610 provides guidance. Second, this part is a land grid device. Land grid devices [ie, BCC�, LGA, QFN, MicroLeadFrame�, etc] are essentially BGA
Electronics Forum | Mon Nov 17 11:09:56 EST 2003 | Frank
Hi, I have a soldering problem with a header SMT straight single row of 8 pins. It's a samtec #TSM-108-03-T-SV-P (P&P). The first problem I have is an allignement one. I do not use alignement pin for now but I expect to use it. Concerning solder
Electronics Forum | Thu Dec 04 07:12:00 EST 2003 | ex maintain leader
Hi Mark, I'm ex Fuji smt service engineer, now I'm leading a a team wich repairs pc-boards in Europe. During replacing P4 processor socket I use an old srt-bga rework staion and an mimistencil wich can be placed abowe the bga pads. My 5 Y experience
Electronics Forum | Thu Feb 05 19:45:33 EST 2004 | davef
Sure, here's one: Micro-Screen; 1106 S High St, South Bend, IN 46001; 574-232-4358 Fax: 574-234-7496; Cathy info@microscreen.org http://www.microscreen.org We list the following company in our notes, but have never used them: SEFAR AMERICA - MEC P
Electronics Forum | Tue Mar 02 17:26:24 EST 2004 | pjc
I worked on MicroFlex. All axis move via electric motor drive. Carraige reapatability is +/- 0.0005" (12 micron). Cameras position more easily on linear bearings than the swivel type. The alignment accuracy and repeatability easily supports sub-20mil
Electronics Forum | Tue Mar 09 18:04:34 EST 2004 | davef
Obviously, if your customer instructs you to use a certain flux type, using THAT flux type is probably a good idea. Responding to your question: Chloride is one of the more detrimental materials found on printed circuit assemblies. Chlorides can com
Electronics Forum | Fri Mar 19 12:09:17 EST 2004 | Primus
I'm just getting more involved with SMT, as I've been a through-hole operator for years. But I don't understand how one could reflow SMT components AFTER the through-hole insertion and solder wave are finished. How does one print paste over a board w
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