Electronics Forum: process (Page 826 of 1146)

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

Electronics Forum | Sat Sep 26 10:50:18 EDT 1998 | Lance Smalley

| 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: Washing boards with paste...?

Electronics Forum | Mon Sep 14 16:14:23 EDT 1998 | Jeff Sanchez

| Dear Larry, | I developed the ultrasonic cleaning process for Smart Sonic. It has developed into the most widely used stencil and misprinted PCB cleaning process worldwide. With that in mind, I offer some words of caution. "IT'S NOT THE ULTRASON

Re: DI Water Cleaning / Need To Control Resitivity More? / Which water?

Electronics Forum | Tue Sep 01 17:18:25 EDT 1998 | Dave F

| | We�ve been thinking again and need your help in sorting through an issue related to deionized (DI) water cleaning of assembled boards. | | THE BACKGROUND: The water reclaiming systems goes: gross filter, fine filter, carbon bed, mixed resin bed

Re: Solder mask materials and equitements wanted

Electronics Forum | Sat Aug 29 08:43:35 EDT 1998 | Dave F

| Hi, Friends, | Could you please recommend me some solder mask materials and equitements for high quality solder mask? Details such as company name, phone numer et al are welcomed. Thanks! | Have a good day | Xingsheng Xingsheng: Consider the follo

Re: Adhesion of conformal coating to plastic components

Electronics Forum | Wed Jun 03 15:22:12 EDT 1998 | Greg Curler

| | We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not

Re: Residue

Electronics Forum | Wed May 27 09:56:39 EDT 1998 | Chrys

| | | 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 localize

Re: Residue/Measuring Flux

Electronics Forum | Wed May 27 15:09:30 EDT 1998 | Dave F

| | | | 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 locali

Re: Aye aye aye. Wait Wait Wait

Electronics Forum | Wed May 27 08:46:25 EDT 1998 | Dave F

| | | | We understand that testing for ionic contamination and surface insulation resistance measure different properties. We assemble printed circuit boards for other companies. We will not get combs on 90% of the boards that we assemble. | | | |

Re: Altera PQFP240 Solderability

Electronics Forum | Thu Apr 16 13:50:49 EDT 1998 | Lou

| We are having some difficulty soldering a 240 pin Altera device. We use Alpha WS-609, a very generic profile for that solder paste, and a 6 mil stencil with laser cut apertures (1:1 ratio). This is a 20 mil pitch device (aperture size is 10 mils X

Re: Altera PQFP240 Solderability

Electronics Forum | Thu Apr 16 13:47:36 EDT 1998 | Lou

| We are having some difficulty soldering a 240 pin Altera device. We use Alpha WS-609, a very generic profile for that solder paste, and a 6 mil stencil with laser cut apertures (1:1 ratio). This is a 20 mil pitch device (aperture size is 10 mils X


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