LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

September 1999

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET September 1999

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

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 >>]

Subject:	Ol Maildemon Played Gotcha
From:	KELLY M SCHRIVER <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 3 Sep 1999 14:03:00 -0400
Content-Type:	text/plain
Parts/Attachments:	text/plain (47 lines)

Hi All - The old mail system gobbled this one up and kinda spit it back in
pieces, so I don't know if any of all of it got distributed earlier, but will
try again - Kelly


Mornin' Steve & All -

IPC-SM-840C, para. 3.3.3, titled Solder Mask/Production Board Process
Qualification Assessment spells out a set of tests that are to be performed by
the board fab house and/or user.  Included in this is "Resistance to Assembly
Process and Chemistry" which requires the mask be tested by processing in the
appropriate flux and cleaner specified in the procurement document.

Having been burnt by this item more than once, I guess you can tell I'm more
than a bit sensitive to the issue.  In our case, we've tested a number of
masks thru our internal processes and impose that listing on our board
suppliers to limit the specific solder masks coming in.

Steve, as Steve Mikell noted, you've hit about the same combination that we
got stung by at one time.  Darned if I know another way to solve the issue,
other than limiting the masks to those you've tested and know to be compatible
with
your internal processes.  I'm leery of just asking the fab house to test the
specific solvents, because they have no way of knowing how many cleaning
cycles, duration, spray pressures, etc.

Y'all have a good weekend 'n holiday.

By the bye, since this is Friday, should we also declare it another "STEVE
DAY"?

Regards - Kelly

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2

LISTSERV.IPC.ORG