Electronics Forum | Thu Sep 16 18:59:14 EDT 2004 | Carol
Thanks Everyone, the information was very useful. We use 7095 as a bible. A-610 6.5.3 doesn't allow for any solder balls not entrapped/attached etc. so we will look again at plugging/tenting both ends of the via. We ran into the problem of the mask
Electronics Forum | Sun Jan 22 00:42:56 EST 2006 | mika
A couple of years ago, the airline SAS (Scandinavian Airlines System) introduce this "Formula 1" concept in Sweden. They did it very succesfully. Many people misunderstand the Formula 1 concept; thinking that you need a lot of people to do "things" a
Electronics Forum | Wed Sep 15 17:53:53 EDT 2004 | aaronrobinson
My question is how does heat alone (125DegC for 48hours) diffuse the water vapour in a component, I figure the amount of water vapour in grams per cubic cm will be the same regardless of temp...yes with temp the RH changes but once the component rea
Electronics Forum | Sun Sep 19 10:54:24 EDT 2004 | rohman23
This (along w/ everything else we do) is not high volume. Actually, we're dropping a batch of 7 the first of the week, and that's fairly sizeable for us. I talked with my stencil design folks and sent them a scrap board and all my gerber info. I t
Electronics Forum | Fri Sep 17 08:03:04 EDT 2004 | soease
Hi Simon, thanks for answering so fast. Well, our company is building several different products to monitor turbine activities (power generation and propulsion). So our boards are equipped with mixed technologies including minimelfs, 0402 chip resis
Electronics Forum | Fri Sep 17 19:27:50 EDT 2004 | debh
Are industry time standards based on actual time...or money? From a start to stop time on a multi-machine SMT line our time is well below standard. (Our company uses industry standard (I'm told) based on .09 sec. per placement.) However each pick an
Electronics Forum | Tue Sep 21 10:50:21 EDT 2004 | Andy
We are in the same position like you. We are in a tug-of-war with our QA with regards to this process. Their reason is that the machine is used for quality purposes which is to verify BGA solder quality so it must be under Quality. From my experience
Electronics Forum | Tue Sep 21 10:53:53 EDT 2004 | davef
We know nothing about Envivar UV 1244 and you weren't real clear about the details of the problem or the materials [eg, ws flux, solder mask, etc], but we'd speculate your adhesion problem goes back to the cleanliness of your board. First by 'alcoho
Electronics Forum | Tue Sep 21 11:34:10 EDT 2004 | davef
Several things to check are: * Ask Multicore if their flux res and your conformal coat are compatible. Conformal coats and NC flux res are notorious for having compatibily issues. * Conformal coat a bare board to determine if there is there is enoug
Electronics Forum | Sat Sep 25 08:59:59 EDT 2004 | davef
IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings says: A conformal coating may have several functions depending on the type of application. The most common are: * Inhibit current leakage and short circuit due to h
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