In anticipation of this, our drawings call for laminate or prepreg to be
FR-4.  Some boards we leave it to the discretion of the fabricator as far as
construction.  You could add "per IPC-4101" and copper foil per the
appropriate IPC doc just to make sure.
Not surprising, since many multilayer boards are done w/foil lam to reduce
$$$.  Just be sure to use a general specification to cover yourself and
communicate to your supplier what you want to end product to be made of or
spec'ed to.

Roger M. Stoops,  CID   [log in to unmask]


 -----Original Message-----
From:   [log in to unmask] [mailto:[log in to unmask]]
Sent:   Monday, March 18, 2002 11:05 AM
To:     [log in to unmask]
Subject:        [TN] Foil Lamination

The call-out on our fab drawings states to use copper clad epoxy laminate
FR4 base material. Our supplier in the past has purchased and certified
material to IPC-4101. We have now found out they have incorporated foil
lamination into their process. What type of requirements should we impose or
verify?
Thanks for your help!
Rick Howieson

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