Electronics Forum | Thu Mar 06 18:48:34 EST 2003 | msivigny
Hello George, SPC can be time consuming but if you don't track or make recordings consistently then how do you measure your process performance and overall line quality?I'm sure your customer is asking because they want you to demonstrate that your p
Electronics Forum | Mon Apr 28 08:52:10 EDT 2003 | davem
Chrissie, I'm glad you (and your people) made it through the painful process of reworking all those BGA's. Hope all your boards sucessfully pass test. Now on to the larger issue. In my experience, the solder paste screen printing process is (along
Electronics Forum | Tue May 06 22:54:08 EDT 2003 | davef
tommyg_fla. Sorry about being late getting back you. Surface-active species, such as Fe2+, Mn2+, NH4+, and H+, can be adsorbed onto solid phases [and transported by things as weird as bioturbation or advection not that they have anything to do with
Electronics Forum | Tue Jul 15 18:44:20 EDT 2003 | davef
Sam says, �The only question remaining to me is that why the failure happened after 48 hours instead of immediate failure after soldering.� Let�s recap: * Had good-looking solder flow. * Passed the initial electrical test. * Failed the later electri
Electronics Forum | Fri Aug 08 18:00:34 EDT 2003 | kenBliss
Hi Bman At the risk of coming off as a �sales type�, you appear to be looking for a solution provider and probably opinions on your ideas. Regarding your method mentioned, This is not the most efficient way to run a stockroom but will work and will
Electronics Forum | Thu Sep 11 15:23:31 EDT 2003 | Peter L.
I have come across a rash of failed assemblies that have 0805 capacitors and resistors, bottom side glued, wave soldered and washed. Trouble shooter reported touching up the solder joints on a few areas and the boards would pass test. I had a look a
Electronics Forum | Mon Dec 08 18:52:47 EST 2003 | Craig M
Stability of process is what your measuring so lets not assume a stable process(if your process was perfect you would have no defects). With no test a medium complexity board will be around 68.7% (according to Consulogic). I dont have many other sour
Electronics Forum | Mon Mar 08 19:41:31 EST 2004 | Ken
Robert, what you have provided is not a "profile". It is a "recipe" or "job". I have 4 BTU VIP98's. I have hundreds of recipes...Your temps look similar to mine....but what does that have to do with the "thermal profile" as experienced by the asse
Electronics Forum | Tue May 04 15:18:45 EDT 2004 | msjohnston1
Ricardo makes some good points. My idea of a dream line is one that flexible to run as a high mix/low vol and low mix/high vol. I personally like Dek printers over MPM. The new printers from Mulara look interesting but they are a new company with a
Electronics Forum | Wed Aug 18 09:20:22 EDT 2004 | QE
Davef, Sorry for the late response. I was trying to gather more info. The group with low ionic contamination levels came from one of our other facilities. We want to outsource more of our product due to increasing demand. Both groups use the same
