Electronics Forum | Wed Sep 30 04:36:54 EDT 1998 | Jacqueline Coia
Still cant get a fix to SMD soldering problems, Joints still look strong shiny and well wetted, although when pulled lead still coming away from pad, leaving a dull grainy looking space. This is occuring just after reflow (convection), no other proc
Electronics Forum | Wed Dec 31 10:09:27 EST 1997 | Ken Daniels
| Has anyone had any experience with thermal shocking | and cracking of SMD capacitors during the rework process? | My company was advised to preheat capacitors to 125 C | at a rate of 2 C/sec before replacing them onto boards. | Would this maybe
Electronics Forum | Thu May 29 14:48:45 EDT 2014 | olek
On one of our designs, we use LEDs Lite-On/LTST-S110TB (SMD). PCB footprint was designed according to manufacturer's recommendations. However, our vendor has problems with assembling these parts. Some parts are tilted, other have bad solder joints or
Electronics Forum | Fri Oct 08 16:36:28 EDT 1999 | Glenn Robertson
| We've recently encountered this problem where one of our .050" pitch BGA's were reflowing at the wave thus causing shorts... The board was profiled with probes stuck to a QFP solder joint, an 0603, and one of the BGA joints. There was an almost 7
Electronics Forum | Thu Nov 11 10:09:06 EST 2004 | D.B.Davis
Dear Colleagues, I am working with a new prototype product that is presenting some interesting problems. My Engineering Dept. has made some suggestions that I find a little odd. I am looking for some confirmation from fellow SMD personnel as to the
Electronics Forum | Thu Jul 15 16:07:39 EDT 1999 | Doug
| | I'm looking into vision inspection equipment to automatically inspect SMD placement and solder joint quality. Does anyone have any recommendations or know of any commonly used equipment? Do other manufacturers use vision systems at their inspec
Electronics Forum | Wed May 16 15:40:56 EDT 2012 | davef
Here's some notes from a Bob Willis presentation Assembly of Flexible Circuits with Lead-Free Solder Alloy [Bob Willis leadfreesoldering.com] * Flexible Circuit Construction ** Base Material - 0.05mm Copper 18/18 um ESPANEX from Holders Technologies
Electronics Forum | Sun Oct 10 17:50:00 EDT 1999 | JohnW
| | We've recently encountered this problem where one of our .050" pitch BGA's were reflowing at the wave thus causing shorts... The board was profiled with probes stuck to a QFP solder joint, an 0603, and one of the BGA joints. There was an almost
Electronics Forum | Wed Jul 25 23:37:11 EDT 2001 | mugen
my guys SOP : Round #1 1) take double-side tape, and peel it flat to the PCB. 2) process this PCB only through P&P SMT. 3) confirm the SMD placement Round #2 4) take thin plastic sheet and tape corners flat to the PCB. 5) solder paste print over t
Electronics Forum | Wed Jul 25 23:35:18 EDT 2001 | mugen
my guys SOP : Round #1 1) take double-side tape, and peel it flat to the PCB. 2) process this PCB only through P&P SMT. 3) confirm the SMD placement Round #2 4) take thin plastic sheet and tape corners flat to the PCB. 5) solder paste print over t
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