Electronics Forum: pass (Page 133 of 142)

Re: Popcorn @ reflow

Electronics Forum | Sat May 22 19:38:59 EDT 1999 | Omat Marasigan

Earl, your colourful impressive descrptions are a joy to read..well lighten's up my day but maybe it's just me...ummmm..? anyhoo, Omat, as Earl has said ..this is a moisture sensative problem basically the reason you blow the shit out of

Was: My Wave Is Getting Fixed, Now: Equipment Vendor Rants!!

Electronics Forum | Thu Mar 11 11:30:03 EST 1999 | Steve Gregory

Hi Steve. > glad your equipment will be back on-line soon. Takes a load off, >doesn't it? You said it brother! Now my next task is to get some people around here to let me do what I think is right in taking care of the machines...I think that'll be

Re: BGA repair/rework

Electronics Forum | Mon Mar 08 20:17:41 EST 1999 | Michael Larsen

I'm having a fun time between BGA rework/repair using an SRT 1000 and SPC efforts (much easier) using DEK stencil printing processes and BTU reflow with 6 Fuji lines in between. Concerning the BGA stuff, I'm getting about 60% success using

Re: How to measure N2 in reflow oven

Electronics Forum | Tue Mar 09 07:06:42 EST 1999 | Charles Stringer

I need to setup an oven to run with a nitrogen atmosphere for boards with BGA's, but our ovens do not have the optional atmosphere monitor and controller. Is there a good way to sample and control the atmosphere without the optional bui

Re: white residue

Electronics Forum | Fri Jan 29 05:14:06 EST 1999 | Graham Naisbitt

Hi guys, I really am at a loss to understand this one. It would appear that there may be some reaction between the flux and the resist? Or maybe you have an OSP on the board that is reacting during soldering? As a fast fix, maybe you should try a

Re: Just finished a VOC-FREE FLUX Evaluations

Electronics Forum | Thu Jan 14 15:10:14 EST 1999 | Earl Moon

Hi Folks. Has any Process Engineer here done a complete evaluation or controlled experiment for VOC-FREE Flux? Our goal here at CEBUKid, Inc. is to implement a VOC-FREE process. We have all the necessary (OPTIFLUX) spray equipment, and we're c

Re: Wave Solder balls

Electronics Forum | Tue Nov 03 16:28:21 EST 1998 | Dave F

Well my process is I'm running my belt speed at 3.50fpm and about 215 to 225 degrees top side. I got my main wave down to a little less than half the board thickness. I'm not using a hot air knife cause we thought it might create more of a problem

Re: I got dem ol' backplane blues...(harmonica wailing in the background)

Electronics Forum | Sat Sep 26 17:58:33 EDT 1998 | Phillip Hunter

O-H-H-H-H-H-H-H Lawdy, lawdy... My babuh done left me... my dawg pee'd on my leg... my cornflakes are all poopy... don't make me hafta beg... I got's dem backplane blues, o-h-h-h-h-h lawdy..." OH! Hi there! Scared me fer a secon

Re: lid soldering problems (CQFP, Au/Sn solder)

Electronics Forum | Tue Sep 22 10:52:31 EDT 1998 | Wayne Bracy

We have problems with voids when we solder lids to ceramic flatpackages. The sealring of the package is gold(100 micro inches or 2.5 micro meters)with a underlayer of Nickel The solder is attached to the lid (preform) and the solder material

Re: reliability of epoxy

Electronics Forum | Fri Aug 07 01:02:51 EDT 1998 | zeek - just wanna to get a word in here

I am looking for advice or information from anyone about the possible reliability problems associated with epoxy on solder pads of discrete devices. Will the epoxy expand and lift over time, Will there be adverse reaction between the solder and t


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