Franklin,
Here are some considerations:

                                 7629 single-ply                  2113 two-ply

cost                                   lower                          higher

dimensional stability                  better                        worse

dielectric constant                     higher                       lower

drilling quality                                                      better

resin fill adjacent layers                                            better

thickness after lamination              7.5 mils                 <7.0 mils (2313 = 7.0)

availability                             fair  (7628 good)           poor  (2313 good)                 

dielectric thickness consistency         better                       


Some of this info is in IPC-4121.
So figure out which criteria are more important, and then try to choose the best option.
If you've already got the 2113 and 7629, the availability is not an issue.
Note that there *not* going to come out with quite the same thickness.
Hope this helps.

Timothy Reeves
Technical Service Engineer - Matsushita Electronic Materials, Inc.
4114 Heather Street, Forest Grove, Oregon, 97116
Main (503) 357-8695     Direct (503) 992-5109    Cell (503) 781-1495     Fax (503) 357-8868


-----Original Message-----
From: Franklin D Asbell [mailto:[log in to unmask]]
Sent: Wednesday, October 02, 2002 2:03 PM
Subject: Advantages of 2113 over 7629


I need some input on any advantages, or disadvantages of using a single
sheet of 7629 versus multiple sheets of 2113 in the same application(s).

Any input would be greatly appreciated.

Franklin D Asbell

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