Electronics Forum: reflow (Page 865 of 949)

Re: Soldering to Gold

Electronics Forum | Fri Sep 17 06:01:12 EDT 1999 | Earl Moon

| | We have some SMT components with gold plated leads. They're actually LCC led packages. A good solder alloy to use would be Indium / Lead to reduce tin dissolution into the gold and avoid the resultant brittle intermetallic compound. However, a re

Re: Cylindrical diodes Missing during SMT process.

Electronics Forum | Tue Aug 24 15:10:14 EDT 1999 | Ian T

| | | | | Hello everyone, | | | | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks in ad

Re: Cylindrical diodes Missing during SMT process.

Electronics Forum | Wed Aug 25 01:25:49 EDT 1999 | Gyver

| | | | | | Hello everyone, | | | | | | We found many cylindrical diodes missing during SMT process. Could someone tell us how to prevent this problem? Is it effective to change the shape of stencil apture or reduce fan speed in reflow oven? Thanks i

Re: Air-Vac stuff

Electronics Forum | Fri Aug 20 13:00:16 EDT 1999 | ScottM

| I'm trying a second time to post this very important message, to me, concerning Air-Vac's following creation. Does any own and use this stuff successfully to remove solder from 20 layer and up MLB's with .020" diameter holes? Also, is any of the ad

Re: testing after SMt assembly

Electronics Forum | Fri Jul 23 10:16:16 EDT 1999 | Boca

| | | Dear all | | | Please help me to know what kind of tests usually done after SMT Pick & place and reflow oven. | | | Our appliocation is Mainly fabrication of mother boards. | | | Thanks | | | | | In theory, ICT is the classical answer (In-Ci

A few more things

Electronics Forum | Sun Apr 25 04:34:09 EDT 1999 | Earl Moon

No this message isn't about my triumphant return. It's not even about that lady I wanted to run away with to Mehico (who were you again). It's about progress and some of you might be interested, or not. 1) For DEKheads, I submit we had two of Britai

Re: Moisture sensitive device processing

Electronics Forum | Sun Apr 25 04:12:34 EDT 1999 | Earl Moon

| At Sanders (Military manufacturer), we have only started using plastic parts within the past few years. After being tasked with reviewing the new J-Std-033, it became obvious to me our process for controlling device exposure is weak. We build very

Re: BGA repair/rework

Electronics Forum | Mon Mar 08 23:43:54 EST 1999 | Dean

> Alignment issues are not so critical on most any system, but thermal >>(top and bottom heater settings) certainly are. Without a serious >>system, I just don't see how it can be done. | | | | Thanks again Earl for your valuable communications..

Re: Solder Balls

Electronics Forum | Wed Feb 17 15:56:22 EST 1999 | Tuffty

| Dear Al, | Are these reworked, double-sided boards? | | If you attempt to clean side #2 of double-sided misprint in a "spray" type cleaner, millions of solder balls can be broadcast throughout the same chamber as the populated side #1. Or, if thi

Re: Problems with wave solder

Electronics Forum | Tue Nov 17 09:24:24 EST 1998 | Earl Moon

| | For some as yet unkown reason, we have started to have some boards sag and go under the wave. The boards are surface mount top side and conventional components wave soldered. We have checked the wave hight and both the profiles on the wave solder


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