Electronics Forum: cleaned (Page 186 of 602)

Clean vs No Clean PCB assembly process

Electronics Forum | Thu Jul 26 13:49:48 EDT 2001 | johnmaetta

That's a good question. On some of the assemblies that our engineers test, appear to have been reworked in these suspect locations. I have requested rework data from our CM by providing them with assembly and serial numbers. Their data shows that th

Clean vs No Clean PCB assembly process

Electronics Forum | Thu Jul 26 14:06:46 EDT 2001 | johnmaetta

That's a good question. On some of the assemblies that our engineers test, appear to have been reworked in these suspect locations. I have requested rework data from our CM by providing them with assembly and serial numbers. Their data shows that th

What is the std Resistivity for DI water at Aqueous

Electronics Forum | Tue Jul 31 13:55:27 EDT 2001 | mparker

Maintain DI water to 18 Meg Ohms resistivity. You can go down as low as 2 Meg ohms, in a pinch, but I would caution on what type of board you are running if trying to clean on 2 Meg ohm. Anything that is running an RF or high frequency circuit could

Misprint PCB Cleaning

Electronics Forum | Mon Aug 06 10:33:32 EDT 2001 | Hussman

Hi Pete, Wow, I figured you'd have tons of answers to this one. Anyway, call the vendor of the adhesive you are using and see if they have a cleaner for their adhesive. Most do now. Just make sure the SMT pads and vias do not have any adhesive on

Re: Noclean soldering to gold

Electronics Forum | Sat Dec 04 09:33:18 EST 1999 | Christopher Lampron

Hello Russ, I believe that the dullness in color of the solder joint is related to the gold finish on the pads. I have had done alot of thru hole soldering of gold pins as well as SMT on gold finish and have seen the condition that you are talking a

Re: Info. on Stencil cleaners

Electronics Forum | Mon Nov 29 11:37:51 EST 1999 | cpitarys

Hello Jason, I will look for the best price and service support to start. Also request an in house trial at the vendor. Jason, are you looking to remove a no clean paste or water soluble paste? Single Chamber Equipment: Most stencil cleaners opera

Solder Stencil Apertures using NO-Clean Paste and 402's

Electronics Forum | Fri Oct 22 11:37:38 EDT 1999 | Brett Gordon

Working DFM SMT issues with respect to a client's artwork together with a heavily modified solder stencil, I was able to reduce 0402 tombstoning from 80% across the board to 3%. I winged the aperture reductions, but are there any "rules" or guidelin

How are your solder balls @ wave solder ?

Electronics Forum | Sun Oct 10 17:57:48 EDT 1999 | JohnW

Folk's, I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. I was wanting to do a straw poll on you guy's as to the type of resist's you are using Glos

Re: Cleaning tissues.

Electronics Forum | Mon Sep 13 13:54:01 EDT 1999 | John Thorup

| Please I would like to know alternative producer of cleaning tissues, squeegees and others smt accessories. | Hello Vincenzo Probably your best bet would be to get catalogs from a number of distributors selling this type of product. That way you

Re: What's a good sub for 1,1,1-trichloroethylene

Electronics Forum | Mon Jul 26 13:15:51 EDT 1999 | jseagle

I guess I wasn't too specific. We currently use 1,1,1 for spot cleaning and minimal rework of PCBs. If there is a lot of rework on a PCB we will use water soluble flux and wash it. This may turn out to be our only alternative, but I hate washing a


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