Electronics Forum | Mon Nov 27 17:47:23 EST 2000 | Dave F
Gyver: Lemme take a wack [if you�ll excuse the expression, given direction of the later discussion] at your questions. Q1. Will the baking of BGA or PCB cause more oxidation before the SMT process? A1. It certainly will not cause less oxidation,
Electronics Forum | Fri Mar 24 17:07:39 EST 2000 | John Thorup
Hello Ashok If you are talking about the thousands of volts that is often generated by either simply unrolling the tape to apply or when it is removed from the board after soldering you don't have a lot of choice since it is an insulator. Ionization
Electronics Forum | Tue Jun 17 09:00:58 EDT 2003 | fmonette
Good question, here is the short answer : The problem is that dry storage is not the same as a bake process. If you want to bake saturated components, this should be done at higher temperatures. The IPC/JEDEC standard provides a table with bake temp
Electronics Forum | Sat Jan 20 20:54:03 EST 2001 | fmonette
Dear Mike, As you might have noticed from the labels on the dry bags, the maximum floor life is specified by the component manufacturer and it can range from 1 year (level 2) down to a few hours after mandatory bake (level 6). This limit is based o
Electronics Forum | Tue Aug 03 17:28:33 EDT 1999 | DLKearns
| | | I have been asked to supply a maximum shelf life for our assemblied PCB's. I realise this is dependent on so many factors- temperature, humidity, no of layers etc. But does anyone have a formulae for calculating shelf life, or does anyone know
Electronics Forum | Sun Jun 13 05:46:21 EDT 1999 | Brian Ellis
Murray "No-clean" fluxes/pastes should not normally give "white residues". Before exploring cleaning, which is costly for small production levels, I suggest you may care to find out why you have these residues. To help you, can you please answer th
Electronics Forum | Thu May 06 09:24:06 EDT 1999 | Joe Manzur
Kevin, We are also looking at printing adhesive. Our application involves printing glue on the underside of the board, once it has gone through the dip, axial & radial process. In otherwords, there are leads cut and clinched and we have to mill out
Electronics Forum | Sat Mar 27 12:36:34 EST 1999 | Scott Cook
| Hi, | I have a customer who's electronic assemblies produce RF. He is insisting upon aqueuos cleaning. We switched to a no clean solder years ago and no longer have an aqueous system. | Is aqueous cleaning necessary to eliminate 'cross talk' of
Electronics Forum | Wed Jan 27 23:29:28 EST 1999 | parag palshikar
| | i am working with the noclean process and getting white residues on the bottomside of the board probably due to the | | wave soldering flux.i am using a no-clean solder paste and a noclean wave solder flux.The boards passed the accelerated tempe
Electronics Forum | Fri Oct 02 16:49:33 EDT 1998 | Dave F
Benji: I tend to agree with you that assemblers shouldn't wear make-up. I'm unsure what first level assemblers are tho. I've been down that finger cot/glove route ... 1 If someone is going to smear facial or cosmetic oil on a board, they can do
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