Electronics Forum | Thu Oct 28 18:14:51 EDT 1999 | John Thorup
Try looking for paste contamination somewhere. Dirty stencil, printer table or fixtures. Placement table/fixtures. Reflow belt/conveyer. Reuseable finger covers, if used. Try covering the fingers with Kapton tape during different stages of the proc
Electronics Forum | Thu Oct 28 11:22:50 EDT 1999 | Jeff Ferry
SMTneters, I'm conducting a workshop titled "Circuit board repair on the Internet" at our California facility on November 10. Similar to a recent posting, I'm seeking suggestions for online resources to discuss with the attendees. In addition to
Electronics Forum | Thu Oct 28 12:02:13 EDT 1999 | John Thorup
Automation and low cost is an oxymoron sort of like jumbo shrimp. Automation will set you back $20,000-100,000. Optical comparitors aren't cheap either. Low cost means good eyeballs, a "golden" sample board and up-to-date documentation. Also low c
Electronics Forum | Fri Oct 29 10:02:28 EDT 1999 | John Thorup
Chris A lot of people have reported sudden, fab lot related problems with Ni/Au pads. These are usually characterized by a discoloration of the gold and called cheerful names like "black pad disease". This can be a process problem at your fab house
Electronics Forum | Wed Oct 27 17:59:54 EDT 1999 | John Thorup
How about some of the more rigid materials like the commercial fixture manufacturers use to machine solder/assembly fixtures from? Glastic, an anti-static version of Delmat and proprietary materials from MB manufacturing come to mind. Search the arc
Electronics Forum | Wed Oct 27 16:58:19 EDT 1999 | hany a. salam
Hello there: Currently we are building our own facility for producing electronic assemblies. I had a long discussion with my colleagues concerning the ESD mats surrounding the sensitive components areas such as the pick & place machine
Electronics Forum | Thu Oct 28 15:28:07 EDT 1999 | Bill Haynes
Hany, ESD mats, in my opinion, are very important. Why jepordize the quality of your product. We use sheets of stainless steel around all areas that are ESD sensitive and ground them to the machines. Of course they are no good unless the people st
Electronics Forum | Wed Oct 27 16:58:13 EDT 1999 | hany a. salam
Hello there: Currently we are building our own facility for producing electronic assemblies. I had a long discussion with my colleagues concerning the ESD mats surrounding the sensitive components areas such as the pick & place machine
Electronics Forum | Tue Oct 26 14:26:28 EDT 1999 | John Thorup
A paint might be pretty but it won't do anything but bad for your fingers. What dave is suggesting that you run a search for is actually a spot re-plating process that you can perform with little mess or fuss. But really, find out why it happened a
Electronics Forum | Wed Oct 27 11:32:57 EDT 1999 | Brian W.
When I evaluated a new glue type, I simply used a shear force tester (Chatillon) to compare the cured strengths of the different glues. I sampled parts of different types; 0805, SOT23, 1206, and various tantalum caps. I analyzed the data based on e