Electronics Forum | Tue Dec 14 11:13:43 EST 1999 | Chris May
Paul, I have (as many have) come across this problem due to misregistration of resist at the PCB fab. You didn't say if these boards are inexpensive double sided or costly multis. I know this shouldn't make a difference on quality but I would tend t
Electronics Forum | Tue Jan 15 09:42:40 EST 2002 | davef
Here's two choices. 1 Before accepting a lot of boards from your supplier: * Print some paste on a board * Reflow the paste * Inspect the quality of the solder connection * Make a decision on accpting the board based on that observation. 2 Have yo
Electronics Forum | Fri May 21 09:48:30 EDT 2010 | tomg_fla
Am looking for a dispensable water soluble solder mask or peelable solder mask that can be dispensed and be run through a reflow oven with no swelling or degradation. Any leads on any materials or manufacturers to contact?
Electronics Forum | Tue Jul 12 03:58:46 EDT 2005 | Chris Ong
Hi Bob, I heard that they have low temperature solder that is able to tackle heat sensitive component. Some of my industrial friend also mentioned that they some sort of low cost material alloy -SCS7?? Is that true? Thanks Chris
Electronics Forum | Thu Jan 24 11:30:16 EST 2013 | davef
I'm not aware of a solder paste solvent. What do hope to accomplish with such a material? May be we can suggest an alternative.
Electronics Forum | Fri Feb 24 04:36:30 EST 2006 | rlackey
Hi Ken, There may be different composites of Durastone, but there are certainly mixes out there that are. http://www.ascenteceng.com/resources/materials.html We used durastone as a carrier for flex circuits as well. Cheers, Rob.
Electronics Forum | Thu Oct 21 23:20:05 EDT 2010 | camtechpcb
According to the Trichromatism.Half red and half blue will get purple.But the trichromatism only apply to color light. The red and blue soder mask are coloring material.Both of them absorb light.You mixed them up,so you lose blue and red,and get grap
Electronics Forum | Sat Apr 29 08:51:39 EDT 2017 | pavel_murtishev
Evtimov, The solution you have described is called multiwave. Consider manufacturing fixture of low thermal mass composite materials. This might help. Regards, Pavel
Electronics Forum | Wed May 03 06:31:30 EDT 2017 | pavel_murtishev
Evtimov, Check them: http://www.mb-mfg.com/products/surface-mount-carriers Only for instance. All can remember material I was using was black and made of pressed fibers. It was hardly treatable as well. Regards, Pavel
Electronics Forum | Thu Jan 12 22:51:12 EST 2006 | davef
We think if you follow your suppliers instructions, you should be OK. Why not have your quality people rip a couple of the soldered heat sinks from the board to assure themselves that your soldering process is adequate? Give them a pair of pliers a
