TECHNET Archives

February 2002

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:
Rob Legg <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 26 Feb 2002 14:38:09 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (62 lines)
Depends on which surface is an original bond and which surface is laminated
in process.

Relative opacity could just be prepreg type, processing requirements. Color
largely irrelevant.

It's a sign that their process has changed, though, so you'd best be on your
guard for more serious deviations.

RL
----- Original Message -----
From: Genny Gibbard <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, February 26, 2002 9:59 AM
Subject: [TN] The board looks funny...


> Hi,
> We just received a new rev of a PWB in house.  It has not been populated
> yet.  It looks like it has been built correctly - the right layer order,
> connections, etc - but it looks different than the rest of our 4 layer
> boards.  Normally the traces on the inner layer that is closest to the
> surface appear dark in colour and the deeper layer appears lighter.  This
> board is the opposite.  The layer closest to the surface is light in
colour
> and the deeper layer is dark.  Also, the FR4 seems much easier to see
> through than usual.
>
> Any thoughts or explanations for this?
> Thanks for your time.
>
> Genny Gibbard (mailto:[log in to unmask])
>
> --------------------------------------------------------------------------
-------
> Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
> 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 delivery of Technet send e-mail to [log in to unmask]:
SET Technet NOMAIL
> To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
> Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail 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 1.8d
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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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
---------------------------------------------------------------------------------

ATOM RSS1 RSS2