Electronics Forum: selective soldering leaves marks on pci (Page 1 of 1)

Selective soldering pallets and solder balls

Electronics Forum | Tue Dec 10 14:10:38 EST 2002 | Randy Villeneuve

Steve, I wave solder most if not all our boards with selective wave pallets. I did not catch if the solder balls were on top of the board or on the bottom but that will make a difference on what to do to get rid of them. Pallets are good and bad. On

BGA footprint on PCB

Electronics Forum | Mon Jun 25 20:37:14 EDT 2001 | davef

You are 100% correctamundo that the pad on PCB should be the same as the pad on the BGA interposer, but let�s not expend that thinking to the aperture of your solder paste stencil, right away. Generally, paste on large pitch BGA is often 1:1, but as

White spots on PCBA after Selective Solder

Electronics Forum | Fri Sep 11 15:27:50 EDT 2015 | u4bga

Hi! We're noticing white spots on 2 PCBAs after the selective soldering & DI Wash processes. ----Facts---- 1) The marking is on all boards, irrespective of date code 2) It only happens on leads that have been selective soldered 3) The pattern of w

Profiling on a Selective Solder machine

Electronics Forum | Fri Oct 04 16:08:28 EDT 2013 | hegemon

Same idea but simpler execution. Verify Solder pot temperature. Verify Temperature of Solder as it leaves the nozzle. Verify preheating gets your PWB up to 90C-120C prior to soldering. Check machine speed, verify 4 seconds contact with solder at

defect on PCB acrylic conformal coating

Electronics Forum | Thu May 09 13:49:24 EDT 2013 | davef

First, it appears that your solder mask and your coating material appear to be incompatible. Second, IPA leaves a residue that's probably not compatible with your coating material, either. IPC-HDBK-830 - Guidelines for Design, Selection and Applic

Darn-left out contact info on the goldinger gloves

Electronics Forum | Mon Aug 03 08:23:37 EDT 1998 | smd

Stevens Products (supposedly around since 1937) 128 N. Park St. E. Orange, NJ 07019 Tel 973-672-2140 Contact: Ross Stevens, Jr. They'll take a PO but terms are net 30 Right now we are taping the goldfingers which is | effective but also expensive. A

Re: Fiducials

Electronics Forum | Mon Feb 22 05:39:58 EST 1999 | Scott Davies

We are currently using circle, cross and double-cross(#) fiducial patterns with SiPlace equipment. Most of the problems seem to occur when, in the case of a HASL fiducial mark, a PCB is topside reflowed, goes away for thru-hole and comes back for bot


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