Electronics Forum | Thu Jul 19 17:54:50 EDT 2007 | swag
Thanks - We ended up using a kapton stencil mainly due to the fact that we couldn't get time on the SMT lines. It worked great, protected the vias and the BGA functions fine.
Electronics Forum | Thu Jul 12 16:17:59 EDT 2007 | bandjwet
We are looking for: 1. A company that sells inspection equipment that can measure the height of solder balls (relative to the plane of the interposer or bottom of the device) OR 2. A service provider who can make some measurements for a user. Any
Electronics Forum | Thu Jul 12 18:21:37 EDT 2007 | arburgos
We are considering buying a new stencil washer machine. We stencil print boards with NC solder paste and in the near future Lead free solder paste. I'd like to hear your experience with this equipments and what you recommend.
Electronics Forum | Fri Jul 13 04:58:01 EDT 2007 | pavel_murtishev
Good afternoon, Heating/Cooling rates contribute to warpage most of all. Try to tweak you profile so that heating/cooling rate would be minimized. Try to switch cooling blowers off maintaining required peak/TAL. Check copper balance for this PWB, by
Electronics Forum | Fri Jul 13 17:01:50 EDT 2007 | sean10
Thanks for your inputs. The board construction seams to be balanced and boards comes back to flat after top side process. we'll be performing experiement variing the profile parameters. if that does not do it, any printing suggestings? Would more sq
Electronics Forum | Fri Jul 13 12:27:30 EDT 2007 | jseagle
As in more dwell? We see the same problem with through holes connected to power or ground planes. The solder reaches the plane and stops. We are having our boards re-designed to increase the thermal relief and expand the hole size. We are also tr
Electronics Forum | Tue Jul 17 10:25:59 EDT 2007 | hussman
You want to know which flux will over come thermal mass problems? That's easy - none.
Electronics Forum | Fri Jul 13 16:07:42 EDT 2007 | wana
Hello All. Can the experts in the lead free field guide me to the articles / data confirming that it is OK to use lead free components in the normal "leaded" (Pb) SMT process. And also if any changes in the process would be required to be made. Th
Electronics Forum | Mon Jul 16 10:28:08 EDT 2007 | wana
Thanks guys for the suggestions. But, what I am looking for is data, papers, articles to support this process of using lead free parts in leaded process. Again thanks for any help that you can provide.
Electronics Forum | Mon Jul 16 11:04:21 EDT 2007 | davef
You want published articles? Look here: http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLC,GGLC:1969-53,GGLC:en&q=leadfree+in+snpb
