Electronics Forum: residues (Page 129 of 177)

Re: White Residue

Electronics Forum | Mon Dec 06 04:40:39 EST 1999 | cklau

Halo; In your last message you did not mentioned why your customer need to use IPA to clean PCB's as their requirement and what subtances they want to get rid of (is it flux stain PCB's or component?).If so recommend your value customer of flux 910

Re: Dross characteristic

Electronics Forum | Sat Oct 09 03:26:58 EDT 1999 | Brian

| Always experiencing dross in pot with different characteristic such as color, shape, dry/wet etc. Any paper, wetsites provide the more comprehesive explanation on its characteristic | Dross is a mixture of various things. The obvious ones are met

Re: Aqueous Cleaning

Electronics Forum | Fri Jul 30 17:32:15 EDT 1999 | Dave F

| Very shortly I will be evaluating OA flux and aqueous cleaning to replace our RMA and solvent cleaning process. I am primarily interested in batch aqueous cleaners for reasons of budget, floor space, etc. I am concerned about the ability of H2O t

problem when testing the RF product

Electronics Forum | Sat Jun 19 11:44:00 EDT 1999 | Vic Lau

Do anyone have any experience on assembling high frequency product, 1.8GHz or 2.4GHz. In our production line, we manufacture 1.8GHz product with using no clean paste (RMA type) for reflow and no clean wire for rework. In our functinal test,either at

Re: HASL - again?

Electronics Forum | Fri Jun 18 12:36:52 EDT 1999 | Brian

What is the future of HASL with lead-free solders? I have grave misgivings as, even if it works properly (which I'm not too sure about), the alloy will have to match that used in the soldering process, or nearly so. No use using a Bi-containing HASL

High Frequency Product.... malfunction when using no clean paste

Electronics Forum | Wed Jun 16 08:56:34 EDT 1999 | Vic Lau

Do anyone have any experience on assembling high frequency product, 1.8GHz or 2.4GHz. In our production line, we manufacture 1.8GHz product with using no clean paste (RMA type) for reflow and no clean wire for rework. In our functinal test,either a

Adhesion loss on passives over wave

Electronics Forum | Wed Mar 17 19:58:00 EST 1999 | Marc Ruggiero

Hi folks, I am looking for inputs on a long-standing problem encountered in our shop: Bottom-side parts (passives) falling off in the Wave...where the only remnants of the part is a flattened glue dot of proper diameter and volume, and sometimes f

Hand soldering rework fluxes

Electronics Forum | Thu Jan 14 16:32:58 EST 1999 | Dave Jurena

Hi all, I thought I'd use this forum to ask a couple general questions on fluxes for manual operations: First - Is it OK to use a wave soldering type flux (specifically OA)? Thinking about activation temperatures and the ramp rate of the wave solder

Re: Cleaning No Clean Wave Solder Carriers

Electronics Forum | Fri Jan 08 17:56:16 EST 1999 | Eric Miller

Hi Chrys, Hate to bring you down, but, wave solder pallets exposed to any kind of flux is subject to "Build up" on the carrier. You still have to clean them, hopefully on a regular basis.If the pallet is being run in a high production envirnment, I w

Re: Cleaning No Clean Wave Solder Carriers

Electronics Forum | Fri Jan 08 18:28:04 EST 1999 | Bill Schreiber

When going to a "no clean" process, there are always two items that will require cleaning - stencils and pallets. You may also have a requirement to clean misprinted PCBs and possibly SMD adhesives. The Smart Sonic Stencil/Pallet Cleaning Process


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