TECHNET Archives

July 1999

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Doug Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 2 Jul 1999 17:19:59 EDT
Content-Type:
text/plain
Parts/Attachments:
text/plain (16 lines)
In a message dated 07/02/1999 12:31:46 PM US Eastern Standard Time,
[log in to unmask] writes:

> We have investigated the PCB fabricators process, the adhesive
>  curing process and the adhesive.  Does anyone have any advice?

And what were the results?  You describe a problem adhering to the mask.  The
SR1010 series is fairly porous and may absorb LOTS of stuff from the HASL
process.  My guess is that you have residual polyglycol residues on the
surface and absorbed into the near surface.  This changes the nature of the
mask.  Polyglycols are frequently used as surfactant agents and are
"slippery".

Doug Pauls
CSL

ATOM RSS1 RSS2