Somewhere in the IPC PWB standards, there are cleanliness levels listed
for the different types of PWBs. I think it is listed in 6012, but I am
not sure. But I know I have seen the spec. and there are different
levels of ionic cleanliness required for different surface finishes.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Russeau
Sent: Tuesday, September 12, 2006 3:33 PM
To: [log in to unmask]
Subject: Re: [TN] bareboard cleanliness related to surface finish
Hi Chris,
The short answer to your question is yes. I would expect (typically)
HASL boards to be "dirtier" than ENIG boards.
Best Regards,
Joe Russeau
Process Analyst
Precision Analytical Laboratory, Inc.
4106 Cartwright Dr. Ste. A
Kokomo, IN 46902
P: 765-455-1993
F: 765-455-1996
E: [log in to unmask]
----- Original Message -----
From: "Chris Ball" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, September 12, 2006 2:19 PM
Subject: [TN] bareboard cleanliness related to surface finish
> Hello Gurus-
>
> Is it fair to expect a higher contamination on a HASL finished
> bareboard than, say ENIG? I would have expected the same level of
> cleanliness when receiving the bareboards, but new supplier says they
> have different levels for different finishes.
>
> We specify tighter than std. IPC levels and never varied the spec due
> to surface finish. Requests for exceptions have been rare and not
> related to surface finish.
>
> Any comments appreciated,
> -Chris
>
>
> "This e-mail message is intended only for the use of the intended
> recipient(s).
> The information contained therein may be confidential or privileged,
> and its disclosure or reproduction is strictly prohibited.
> If you are not the intended recipient, please return it immediately to
> its sender at the above address and destroy it."
>
> ---------------------------------------------------
> Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or 847-615-7100 ext.2815
> -----------------------------------------------------
>
---------------------------------------------------
Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
