TECHNET Archives

June 2005

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:
"Douglas O. Pauls" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 14 Jun 2005 11:43:04 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (103 lines)
Eric,
I would guess that the dust you see is dust from the routing or punching of
the board surface.  I would not accept them.  Particulates can get in the
way of glues, solder joints, etc.  In my opinion, it is indicative of a
sloppy manufacturing environment.  You have to invest time and effort
having your people brush off the boards.  Should not happen.

Doug Pauls




             ekalgren
             <ekalgren@CHELTON
             MICROWAVE.COM>                                             To
             Sent by: TechNet          [log in to unmask]
             <[log in to unmask]>                                          cc

                                                                   Subject
             06/14/2005 10:54          [TN] PCB rejection criteria
             AM


             Please respond to
              TechNet E-Mail
                   Forum
             <[log in to unmask]>
             ; Please respond
                    to
                 ekalgren
             <ekalgren@CHELTON
              MICROWAVE.COM>






Good morning everyone,



I've got a question on bare PCB's.  These are relatively simple boards that
have been red flagged in incoming inspection for having scratches in the
soldermask that expose the underlying copper.  Now, even I know that this
is
truly a defect.  QA has also written up the entire lot of boards for being
dusty and a couple of the lot for having "excess solder."  The excess
solder
is just a couple of PTH's that are partially filled by the HASL.  I'm not
sure what the dust is but it blows off easily and doesn't seem to be
affecting anything other than the inspector's sense of cleanliness.



My question to all of you out there is: how should I handle the dust issue?
Is this typical of boards coming in from the shop and should I tell the
inspectors to go easier in the future or do I demand spotless, dust free
boards from our supplier?  I don't want to accept junk but at the same time
I don't want to drive costs up by over inspecting. Where does one draw the
line?



Thanks in advance,



Eric Kalgren

Manufacturing Engineer

Continental Tool and Microwave Company

[log in to unmask]




---------------------------------------------------
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
-----------------------------------------------------

ATOM RSS1 RSS2