Electronics Forum: soldering (Page 1091 of 2099)

Re: Solder masks for gold fingers/Try Rubber Shunts

Electronics Forum | Thu Jun 04 20:52:57 EDT 1998 | D.Lange

| | I have gold fingers that I want to mask when running over the wave without pallets. They're on the leading edge of the board. I recall seeing rubber boots that slid onto the fingers to mask them. Pop 'em on before the wave; pop' em off after a

Re: Double sided smt

Electronics Forum | Wed Jun 03 13:50:32 EDT 1998 | Chrys

| Can anyone tell me if there is a reference for smt component height specs on the bottom side of a board, which will also go through wave soldering. A current design I am reviewing has tant caps(7343) and a crystal on the back side. Should I only b

How to clean a Entek Coating Board

Electronics Forum | Fri May 29 14:01:36 EDT 1998 | Joseph How

Does anyone out there can let me know how to clean a Entek Coating Board if I have a misprint during solder paste printing?

Re: Residue

Electronics Forum | Wed May 27 14:20:43 EDT 1998 | Earl Moon

| We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not localized to

DI Water Tarnish On Metal Parts

Electronics Forum | Wed May 20 15:10:35 EDT 1998 | Dave F

We notice that DI water seems to tarnish or discolor the metal packaging on crystals and DIN connectors. Our marketing types like the shiney metal surfaces. We don't want to hand solder these parts after washing. Any suggestions? Dave F

Re: Micro balls on gold fingers

Electronics Forum | Mon May 18 21:29:38 EDT 1998 | D.Lange

| I've tried every thing I can think of. Do you have any | Ideas? | What I have is micro balls on the gold fingers of | panelize boards. These balls only appear on the gold | finger. Or at least I can only find them on the gold | fingers. | What I

Re: Micro balls on gold fingers

Electronics Forum | Tue May 19 12:29:59 EDT 1998 | Richard Jackson

| Richard, | You may be encountering solder paste contamination | on the assembly during the printing process. Solder | will reflow on tin/lead plated lands therefore invisible. | If you are washing the assembly prior to inspection | then you are

Re: Update on Rotary Chip Waves

Electronics Forum | Fri May 29 22:03:49 EDT 1998 | Tom Gervascio

| | Last week I posted a message on rotary chip waves that stated that the drive shaft had a protective boot around a u-joint that degraded and exposed the joint. | | Someone from the manufacturer read it and contacted me. He told me the problem has

Re: Pallet problems

Electronics Forum | Fri May 08 16:30:59 EDT 1998 | Chrys

| I am running boards with gold fingers on a pallet for | masking purposes. The pallets worked fine for a while | but know the gold fingers are getting solder on them. We | have tried everythin: new pallets, cleaning the pallet | and board to be s

Re: Pallet problems

Electronics Forum | Tue May 19 08:48:05 EDT 1998 | Aric Parr

| | I am running boards with gold fingers on a pallet for | | masking purposes. The pallets worked fine for a while | | but know the gold fingers are getting solder on them. We | | have tried everythin: new pallets, cleaning the pallet | | and boa


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