Electronics Forum | Thu May 18 08:35:59 EDT 2000 | Nancy V
Hmmm, I don't think JAX knows Earl very well. He did not need to bait Earl. I don't think he could have resisted that the name was Janet. I am sure he "sensed" that a woman had shown up on the forum :) (Sorry, couldn't resist, Earl) Nancy
Electronics Forum | Tue Dec 22 10:59:20 EST 1998 | John Watt
Folk's, I'm in need of some help / direction. I'm working on my thesis for a masters based on looking at the effect's of the solder resist promoting / reducing the amount of solder ball's during wave. I'm looking at thing's like colour, texture, com
Electronics Forum | Thu May 01 18:37:31 EDT 2003 | gregoryyork
Did you get any dulling of the solder joints at all or importantly was the resist discoloured or bleached after cleaning. It is possible to absorb flux and saponifier into the resist and this will definately cause poor SIR or electromigration especia
Electronics Forum | Thu Jul 03 08:40:23 EDT 2003 | Kris
Hi, undercured solder resists may be a defect people have seen so far. Some of the probles arising is blistering as well as reaction with wave solder flux that may lead to some kind bad gel like formations. Gels the idea would be to reflow the ba
Electronics Forum | Wed Jul 09 19:05:06 EDT 2003 | randywomack
LOZ. Under-cured or out-of-spec(sloppily) applied resist is realistic. What other physics: Shiny resist surface is more prone to balls then matte finish. How about an operator eating fish & chips before handling the boards. Don't laugh... ... saw th
Electronics Forum | Fri Jul 23 05:25:20 EDT 2004 | greg york
Got to agree with John on this, get a stencil cleaning wipe something a little more potent than standard IPA and wipe the surface thoroughly, this should produce a green residue of solder resist. If this does happen then ask your PCB vendor to look a
Electronics Forum | Tue Aug 23 09:53:05 EDT 2005 | davef
There's some good background information on SIR [surface insulation resistance] on the web. Here's an example: http://www.tracelabs.com/TechLibraryDoc.aspx?id=4 Look to IPC-9201 - Surface Insulation Resistance Handbook SIR readings vary with: * C
Electronics Forum | Tue Nov 15 21:15:22 EST 2005 | davef
A fairly painless method for monitoring cleanliness is Resistivity Of Solvent Extract [ROSE]. Equipment is: * Omegameter * Ionograph * Ion Chaser [Zero-Ion] Anyone who desires to use an Resistivity Of Solvent Extract tester should read EMPF repor
Electronics Forum | Wed Feb 07 13:43:33 EST 2007 | realchunks
Board vendors are always right. Unless you build yourself in their facility, at their price. Ways around this are half etch your stencil over the vias, open the resist (mask) on the vias, or use your own product (Sipad). The resist (mask) does app
Electronics Forum | Wed Feb 28 07:40:26 EST 2007 | realchunks
Hi Roderick, Guess it depends on how you define "minor". If it is just a visual blemish in the mask, there will be no affect o the BGA. If it is through the resist there may be a chance of solder shorting, which will affect it, I doubt it but poss
