Full Site - : white residue on wet circuit boards (Page 9 of 17)

ECOs on OSP finish

Electronics Forum | Sat Jun 30 11:28:24 EDT 2001 | davef

Consider using a roll solder with a flux that well matches the residues you can accept to be remaining on the board when you get finished processing. Many people use a no-clean flux cored roll solder for such operations, because they don't want to c

adhesive on pads

Electronics Forum | Mon Apr 01 20:10:24 EST 2002 | davef

Oh. [Howabout if I smack you?] If ahma connectin� wif whut yer sayin�, you: * Don�t like the appearance of the glue slobberin� out from under the component even though there is no apparent glue on solderable surfaces. * Concerned about the hydrosco

Re: White layer appearance on PCB

Electronics Forum | Thu Jan 28 16:29:03 EST 1999 | Tom B

Okay, Another question, if the soldermask in not cured, then it is washed will water ingress (from wash or ambient ) play havoc with capacitance or dielectric of PCB. I mean will my crystal and clock circuits start "Y2K'n" on me. OR will my PCB go

Solder balls on Cleaned process

Electronics Forum | Wed Oct 17 19:12:32 EDT 2001 | scott

Dave's right! Wash the boards RIGHT AFTER reflow, don't let that residue harden. Then you turn around and cure that stuff during the second reflow by not performing the first wash???? wow.... By the way, are you having any problems with white resi

Barcode printing on the PCB

Electronics Forum | Sat Mar 06 10:39:34 EST 1999 | Sam Sangani

I am looking for a barcode machine/printer which will print barcode directly on printed circuit boards with non transferable white ink. This has to be done before PCB assembly. Any help will be appreciated. Please reply directly to my E-mail. S

Barcode printing on the PCB

Electronics Forum | Fri Mar 12 19:09:21 EST 1999 | Jess Baker

Manufacturers who have to mark barcodes onto PCB's without secondary application of pressure sensitive labels can etch it on, screen it on, inkjet it on, use laser marking, or a combination of those. Using a laser marker to write a code into a label

non-wet on 0402 mounted on OSP & lead free paste

Electronics Forum | Fri Oct 17 22:36:35 EDT 2008 | arosario

Hi All, We just started build a new product and I am encountering many non-wet rejects in our new product. I need help on what should I look into to improve our Yield. Please see below back ground 1. We are using DEK Infinity as printer. 2. We are mo

flux on PCB's after cleaning

Electronics Forum | Wed Jul 21 17:49:52 EDT 2004 | jsk

problem: Too many solvents and boards are not clean Flux remains on the board after vapor degreaser and "Powdery" white residue after vapor degreasing Flux type is kester 186 Process: hand solder High Temp alloy, spot clean after hand solder e

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


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