Electronics Forum | Thu Mar 16 10:55:23 EST 2006 | Baer
I can tell you that I have been involved in new process chemical introductions for 40 years. I have seen a lot of claimes and this is one of the best inovations I have seen. If I was not convinced of this I would not be involved. As for process impr
Electronics Forum | Wed Aug 11 13:34:58 EDT 1999 | Dave F
(snip) | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little later on. It has
Electronics Forum | Wed Aug 11 09:51:11 EDT 1999 | Brian
| | | Easy goods-in polymerisation check: clean, white, cotton cloth: wrap it round a suitably gloved finger and pour a few drops of methylene chloride (! toxic) onto the end of the finger and rub it onto the bare board for a minute or so. If it come
Electronics Forum | Thu Aug 12 05:33:23 EDT 1999 | Brian
| | (snip) | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little later on
Electronics Forum | Thu Aug 12 22:23:23 EDT 1999 | Dave F
| | | | (snip) | | | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a little
Electronics Forum | Fri Aug 13 10:39:25 EDT 1999 | Boca
| | | | | | (snip) | | | | | | | | You're quite right. However, anyone who uses MeCl in an aerosol spray needs his head examining. I'll go further: if he continues, he will most CERTAINLY need his head, the rest of his CNS and his liver examining a
Electronics Forum | Sat Aug 14 17:39:37 EDT 1999 | Gerry S.
One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact with the
Electronics Forum | Fri Oct 14 04:00:05 EDT 2005 | steve
Your friendly wave guy here, check out Aim solders web site. click to the right where it says lead free. There is a complete discussion on what can occur. http://www.aimsolder.com
Electronics Forum | Wed Jul 29 07:06:44 EDT 2009 | patrickbruneel
Deni, This looks more like webbing and not flux residue. Webbing is caused by not enough flux to protect the surface resulting in oxide webs sticking to the board surface. The insufficient flux can be caused by: - Weak flux foam head - Air knife p
Electronics Forum | Wed Jul 29 07:26:12 EDT 2009 | dilogic
Hi Patrick, thanks for the response. I might add some more information - we succesfully soldered some boards with the same settings of belt speed, pre-heat temp. etc. This batch of boards differs from the previous in a way that they are 4-layer. May
