Electronics Forum | Thu Jun 18 15:04:48 EDT 1998 | smd
| | | We're running into problems with board damage (broken traces, solder shorts) due to pliers and other bizarre tools being used for depanelization. I need some sort of fixture for this. A delrin plate with a slot cut to the correct depth and wid
Electronics Forum | Wed Jan 19 23:24:03 EST 2000 | armin
Hi, We have a couple of pcb's with PTH Crystal. We are looking for a spacer to be placed between the metallic body of the crystal and the via pad/land as they tend to short if wave soldered without a spacer. The spacer we are looking for is somethin
Electronics Forum | Fri Oct 29 02:07:48 EDT 1999 | Eom In Soub
hi. guys Have you out there ever seen the crack by means of humidity after reflow solering. We cannot analyze the cause of the tsop crack. The shape of crack seem to be hitted by sharp stuff. but there is no scar around crack . TSOP shaped long rec
Electronics Forum | Mon Sep 28 09:23:03 EDT 2015 | slave2anubis
Hi, sorry for reopening a old thread, but i wanted to ask if there is a way to know at what temperature the solder melts if you have a chip with underfill? I thnk its lower then normal air-fill temperature since the underfill conducts heat better the
Electronics Forum | Wed Apr 13 12:10:47 EDT 2022 | winston_one
Hello! We have a strange effect. Some pads of big trough-hole DDR slot just dessapear. Initialy it was soldered with selective soldering process (leaded, 290 degrees, ImSn finish, very short storage). Then some connectors with poor barrel fill we hav
Electronics Forum | Thu Oct 25 21:04:18 EDT 2001 | davef
You are correct. So, the unit amount of gold [based on IG plating thickness, size of the pad, etc.] dissolves in the solder very quickly. When the solder is liquid for: * A long time, the gold disperses more. * A short time, the gold concentrates a
Electronics Forum | Wed Mar 26 09:19:20 EDT 2008 | nibirta
hi all...well i`m working in such a lab but we are working internally, and for our customers. But i can give you some prices from other labs. Cross section-one location is around: Solder Joint Integrity Std. sample plastic package $300.00 Shorts /
Electronics Forum | Sat Mar 20 00:58:10 EST 1999 | Mike C
| After rmoving a BGA (plastic)to correct unexplained shorts | I installed another BGA using flux only. | Checking on an X Ray machine and found two shorts. | | can anyone give a good explenation ? | | Thanks | | Ron | Another possibility Via's n
Electronics Forum | Thu Jun 13 11:25:40 EDT 2002 | davef
Help us understand your situation by telling us about: * Is this a terminal-to-terminal short on a single MELF? Or is this a terminal-to-terminal short between or than one MELF? * Clearance of 0.8mm is the distance between what features? * Size ME
Electronics Forum | Wed Apr 27 11:43:32 EDT 2005 | patrickbruneel
Hi Daan, What we did in the time was pareto analyses on all board designs to determine the critical areas (mainly design errors) and only inspect those specific problem areas. Every batch had a copy of the PC board with problem areas marked and only
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