Electronics Forum | Tue Aug 03 13:03:20 EDT 1999 | Dave F
| | 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 of
Electronics Forum | Tue Aug 03 13:03:48 EDT 1999 | Dave F
| | 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 of
Electronics Forum | Thu Jul 22 22:57:14 EDT 1999 | Earl Moon
| Does anyone have any experiences with bga reballing. | When I had reworked failed bga part with new part It was good. | So I tried to reball bga detached but failed . | I guess the cause of fail is thermal shock. | IS IT OK TO REBALL BGA PARTS
Electronics Forum | Thu Jul 15 11:01:06 EDT 1999 | Earl Moon
| | Hello All, | | I am setting up a line to mount CSP/uBGA devices and now am looking at the X-Ray process. It is my opinion that this should be done offline - can you tell me if Im right or do I need to put one inline? | | Also anyone who is mou
Electronics Forum | Fri May 14 00:28:09 EDT 1999 | Mike D.
| I am seeing reflow around my signal pins after being subjected | to a profile of 204c for 1 minute and 225c for a min of 30 seconds. Signal pins are soldered into a copper plated alum. case with SB5 and then silver plated. The pins have a hot oil
Electronics Forum | Fri May 14 11:24:00 EDT 1999 | Chrys Shea
| Looking for a reasonably priced portable device to do strength test(shear/twist)on glue cured Cap/Res. Any suggestions? Thanks | My torque watch came from Waters Manufacturing, Inc. A div of Talley Industries. Longfellow Center, Wayland Mas
Electronics Forum | Fri May 14 12:13:55 EDT 1999 | P.L. Sorenson - Technical Consultant
| | Looking for a reasonably priced portable device to do strength test(shear/twist)on glue cured Cap/Res. Any suggestions? Thanks | | | My torque watch came from Waters Manufacturing, Inc. A div of Talley Industries. Longfellow Center, Wayla
Electronics Forum | Sun Apr 25 11:37:51 EDT 1999 | Earl Moon
| We are just starting to manufacture a PCB with a .039" fine-line PBGA. We are currently seeing voids, mainly in the center, that are as much as 45%. We also intermittently see the corner balls of the PBGA smaller than the center balls. We are using
Electronics Forum | Wed Mar 31 13:15:43 EST 1999 | John Doe
| | It's unfortunate that there are corporations that exist that would actually hire and employ people of your specimen. You, obviously by your screen name, GSM GURU!, are a complete idiot. I'd like to see you and your idiot brother C4 GSM GURU ter
Electronics Forum | Tue Mar 16 17:45:29 EST 1999 | Russell Bartley
| | | I'm in the process of selecting a medium speed pick & place machine. I need to place a wide range of components from 0805 | | | chips to a 144 pin MQFP (32mm square 25mil lead spacing). | | | | | | Anyway, I'm looking at the Quad QSA-30, the
