Electronics Forum: osp residue (Page 1 of 4)

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: white residue

Electronics Forum | Wed Feb 10 12:52:21 EST 1999 | Dick Casagrande

|I'm getting in a little late on this but my 2 cents is: We have been using no-clean flux for a few years now but up till last month were still cleaning (the white residue) our boards (all thru hole). Finally did some investigation and found the flux


Electronics Forum | Wed Aug 21 10:26:08 EDT 2002 | stownsend

We are using OSP coated boards and no-clean solder paste. In a few instances, we are seeing increased distortion in an audio circuit. Has anybody seen or heard of surface insulation resistance (SIR) decreasing after reflow on OSP boards? Is it possib

Motherboard become NO POST when humidity increase to 90%

Electronics Forum | Wed Nov 25 09:40:56 EST 2009 | Sean

Hi Greg, The board is with immersion silver finishing..One of my friend had the same issue even with PCB OSP finishing.. Besides, no white residue found on the top side... Its only appear on the bottom side but no so obvious... Rgds, Sean

OSP finish and Omnix 5002 solder paste(SnPb)

Electronics Forum | Fri May 14 09:00:35 EDT 2010 | rafacadiz

I attached a RX picture. A lot of voids and micro balls arround the flux residue. What do you think, relow temperature reflow or OSP poor weeting.? I appreciate your comments. Thanks,

About testability of OSP board

Electronics Forum | Fri Apr 30 16:51:57 EDT 2004 | davef

This issue is not "testability of OSP board". It is "testability of nc flux residue". Kester [or some other flux suppler] can probably recommend a flux residue that is more probeable. We have talked about the problems with probes getting gummed-up

Alpha UP78 OSP problem

Electronics Forum | Tue May 11 16:27:12 EDT 2004 | davef

What is the problem with "too much residue"? How much residue is acceptable?

Alpha UP78 OSP problem

Electronics Forum | Tue May 11 10:43:37 EDT 2004 | Melissa

Has anyone experienced problems lately with excess flux residue left on the board after reflow when using Alpha UP78 OSP paste? We are getting a component failure that the designers are blaming on too much residue. Thanks

Print solder paste on test pad on OSP board

Electronics Forum | Fri Sep 10 09:39:32 EDT 2004 | Bryan Sherh

Dears, I've a board with OSP surface finish,and I planned to print solder paste on the test pad for easy ICT, because the probe can't reach the OSP covered pad.But to my surprise,after reflow there's much flux residue on top of test pad(or solder) an

How actually the process of Electrofoam Stencil?

Electronics Forum | Fri Jan 07 09:56:04 EST 2005 | davef

Electroformed stencil suppliers follow. The describe the stencil production process on their sites. * Aplpha Metals [ http://www.alphametals.com/products/ stencils/pdf/PG_Electroform_Stencils.pdf ] * Chepaume [ http://www.chepaume.com/electroforming

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