Electronics Forum | Tue Jan 10 11:51:16 EST 2006 | jax
I don't believe I have ever seen a non-destructive test for "Black Pad" that I could take back to a Fab house and collect monetary losses with... But if this test method actually does hold merit then collect away. I would like to know how this metho
Electronics Forum | Thu Mar 30 06:20:08 EST 2006 | smartasp
Hi Fellas After bangin my head several times on the cold and hot solder pot nothing improoved. The residues still bother my customer. I agree with less is better but if we apply less we have a cleaner board but the solder won't flow all the way up.
Electronics Forum | Tue May 02 13:57:21 EDT 2006 | patrickbruneel
What you can do is perforate the board holding rim by drilling holes of 0.6mm (similar to via's). This will reduce the mass and heatsinking capacity, allow excess flux drainage and facilitate convection heat contacting the board through the holes. Th
Electronics Forum | Tue Jun 26 11:24:56 EDT 2007 | ck_the_flip
Patrick, Back in my rich OEM days, i actually DID measure mg/in^2. I bought a scale, which measured in mg, specifically for this. Basically, took a blank PCB, took a "before" weight, sprayed it, and then took an "after" weight. I measured at diffe
Electronics Forum | Fri Nov 23 18:16:08 EST 2007 | g2garyg2
I may be able to help but would need to understasnd more about your application. The rating on the diode laser can directly effect its ability to refelct or penetrate the solder, but I would lnot to rule out beam placement at the joint either. If yo
Electronics Forum | Wed Mar 12 07:33:40 EDT 2008 | callckq
Hi All, One PCBA failed test after went through the Shock Test(Vibration) and suspected to be BGA solder ball crack. We performed dye and pry and found PCB's pad lifted with red mark ink penetrate pad underneath, what does this mean? Can I say the
Electronics Forum | Wed Apr 23 21:34:24 EDT 2008 | fowlerchang
It is CSP reliability issue, which is the mobile CPU from Spreadtrum. All the tests passed and shipped to customer. They assembly them and tested but failed. After they reflow this CSP with hot air gun, some of the boards passed. We got some board
Electronics Forum | Wed May 14 08:26:17 EDT 2008 | realchunks
Lead cannot be penetrate your body through your skin by just touching it. You have to swallow it. It does not promote cancer or cause you to go steril like the rumors at my plce of work talk about. Although it is fun to touch people you dislike wi
Electronics Forum | Wed Jul 02 02:46:44 EDT 2008 | tang
Hi Guys, I have few question would like to ask regarding pcb conformal coating: 1. Can I know which masking material is the best for easy apply, fast cure, fast & easy to remove after coating & baking. And no chemical reaction which will whiten the
Electronics Forum | Thu Jul 17 14:30:42 EDT 2008 | tommyg_fla
1500 lbs) vary by a couple of degrees) were standard. I thought that flux penetration into PTH barrel and solder pot immersion depth and solder pot parallelism would be also critical factors. We are using the ECD WaveRider to measure the implied sold
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