Electronics Forum | Wed Feb 28 09:53:17 EST 2001 | fkurisu
Hello Dave, Solder mask rework has been performed on both bare and populated boards. There are factors that come into play with a populated board that make this type of rework more difficult, such as the density of components(especially around th
Electronics Forum | Wed Feb 28 19:48:11 EST 2001 | davef
If we were talking about a single board problem, we�d be thinking about the laminate, but since you imply the problem is broad-based across multiple assemblies, consider the following machine parameters: * Crank-up preheat time / temperature to driv
Electronics Forum | Tue Mar 13 11:13:05 EST 2001 | blair
Hi: We are about to build a batch of highly critical control cards with 5 BGA on them. We just recently had a significantly bad yield at our subcontractor in the San Jose area. We feel it is in the reflow profile that was used but are not 100% sur
Electronics Forum | Tue Mar 13 13:13:39 EST 2001 | cebukid
Not to toot my own horn, but ever since I came on board at my company, wave solder defects have gone down by 35%. This was due mainly to a new flux and a process control system that I implemented back in '99. Now, the metric used was DPMO. How do
Electronics Forum | Tue Mar 27 02:57:32 EST 2001 | Ken S.
Have you a reflow oven that has upper and lower heaters? Have you a reflow oven that uses hot air as well as elements to control the transfer of heat to various areas? If yes to these, I would suggest increased air flow or change in direction of
Electronics Forum | Fri Mar 30 07:14:42 EST 2001 | pteerink
Genny, Xray systems ( or at least what I have seen ) are a manual based system. That is, you put the board on the machine and look at certain locations that you want to inspect. What we have in mind is an automated system that will catch obvious, no
Electronics Forum | Fri Mar 30 07:14:51 EST 2001 | pteerink
Genny, Xray systems ( or at least what I have seen ) are a manual based system. That is, you put the board on the machine and look at certain locations that you want to inspect. What we have in mind is an automated system that will catch obvious, no
Electronics Forum | Mon Apr 09 05:15:36 EDT 2001 | sinclair
Why measure solder volume? I believe if one understand the process well enough, the effort should be spent on area that will gives better indication of your solder printing process. From my personal experience, a lot of auditor knows little of the pr
Electronics Forum | Mon Apr 23 14:59:56 EDT 2001 | relensky
I have been using pallet from Integrated Ideas and Technologies (www.integratedideas.com). They offer a "laminated" pallet that can have the various layers cut in several thicknesses. They are very helpful and willing to solve problems. The best p
Electronics Forum | Tue Nov 28 15:06:59 EST 2000 | rabell
We have recently moved our "ESD: See it! Believe It! Control It!" product to a network version. This particular course is aimed at engineers and technicians, and these people typically already have a computer on their desktop, so providing the train
