James,
Your question seems so simple to answer but someone could actually write a
50
page book about it. Some of the material manufacturers have on their web
site
the thicknesses, resin content, gel time, etc. of all the pregs that they
manufacture.
The problem is that they vary somewhat from manufacturer to manufacturer,
and you may
also get variation from board house to board house. The three mentioned
prepregs in my past
experience would actually be .008-.009. My personal advice would be not to
have specified
prepregs on the print and and stick to overall board tolerance.(unless
controlled impedence
is involved).Leave the stackup to the board manufacturer.
You can contact me offline if you would like.
Regards,
Tony Steinke
[log in to unmask]

----- Original Message -----
From: "Marsico, James" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, April 23, 2002 1:05 PM
Subject: [TN] PREPREG


> Hello, Technetters:
>
> I'm very naive when it comes to prepreg, so I'll go to the experts.  Is
> there a list available of prepreg designations (i.e. 2313, 1080, 106,
etc.)
> with the respective properties?  Will a stack-up of the three prepregs
> mentioned yield a thickness of .006 inches?  Where can I find information
on
> hot to specify prepreg layers in a PWB?
>
> Thanks in advance,
>
> Jim Marsico
> Senior Engineer
> Production Engineering
> EDO Electronics Systems Group
> [log in to unmask] <mailto:[log in to unmask]>
> 631-595-5879
>
> --------------------------------------------------------------------------
-------
> 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 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 1.8d
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 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
---------------------------------------------------------------------------------