I ran into a major problem with paper when I was working in a shop, We used to do a test, we took freshly scrubbed copper and built a stack of it and the spacer paper, we then put rubber bands around it and put the whole thing in a humidity chamber ( 95F/95% rh) for 2-3 days , if we saw no corrosion, and if the copper wet when we solder dipped it , then we could use the paper. WE checked each shipment of paper once it was accepted( or lot if it had a lot number)
Just a little insight, I used a lot of different papers based on what the customer wanted, the best I ever found was plain old wax paper! it would keep the boards from sliding and marking the surface, left no residue except in very rare cases, and since the wax was soluble , and would melt, it would always come off in either a cleaner , or during assembly.
Russell Smith
-----Original Message-----
From: Hernandez, Victor G [mailto:[log in to unmask]]
Sent: Thursday, March 20, 2003 3:37 AM
To: [log in to unmask]
Subject: Re: [TN]
Rey,
In a pass life I had the opportunity to work in a PCB Fab house. We ran
across the same issue. We used a chemical free pink paper. I wish I
could give you more details but unable to recall them. Best of luck.
Victor,
-----Original Message-----
From: Rey Degollado [mailto:[log in to unmask]]
Sent: Thursday, March 20, 2003 4:27 AM
To: [log in to unmask]
Subject: [TN]
Hello Technetters,
Good day,
Is there anyone out there who had experience/s in using ordinary bond paper
as spacer in finished PCB? We are using this type of paper and we think that
it contributes to contamination leading to bad wetting. Are there any
standard or qualification needed for papers being used as spacers? Anybody
had a study that support our theory?
THANKS
Joe
Daeduck Phils., Inc.
PEZA, Rosario, Cavite, Phils.
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest Search the archives of
previous posts at: http://listserv.ipc.org/archives Please visit IPC web
site http://www.ipc.org/html/forum.htm for additional information, or
contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------
|
