If it is uv cure mask, insufficient cure due to aging of the lamps.
--------------------------
Sent using BlackBerry
----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Mon Aug 24 17:38:49 2009
Subject: Re: [TN] Manual spraying, further qs
Thanks Ken,
are there any stds that demand a perfect surface, e.g. any IPC standards.
And what use to cause outgassing issues? I have several PWB courses behind,
but many, many years ago. Can dig in my piles, but a faster answer from TN
seems a bit more comfortable.
/Inge
----- Original Message -----
From: "Ken Bloomquist" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 24, 2009 11:20 PM
Subject: Re: [TN] Manual spraying, further qs
> The bad board had beans for lunch, "bad out gassing problem"! :-)
>
> KennyB
>
> -----Original Message-----
> From: Inge [mailto:[log in to unmask]]
> Sent: Monday, August 24, 2009 1:50 PM
> To: [log in to unmask]
> Subject: Re: [TN] Manual spraying, further qs
>
> This very day, I couldn't stay aside but had to do something to help the
> production guys. So, I took a fresh, naked and qualified board from
> another
> source and did this:
> Put one of our problem boards beside the reference board, both on bottom
> of
> a larg well box, i.e. no fans blowing, nor any evacuation. Sprayed both
> simultaneosly. Inspected them after one hour at room temp. The reference
> board was absolutely perfect, while the other was matte! Had a look in a
> microscope. The bad guy had thousands of microscopic inclusions and even
> superficial voids, the reference was perfect. Noticed that the bad boards
> have a much coarser (looks like the net pattern after screen
> printing)green
> sheet (solder mask) and numerous voids already before spraying. What is
> your
>
> opinion?
> /Inge
>
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> 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 15.0
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
-----------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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
-----------------------------------------------------
|
