I'm looking for a reading on the most common version of FR4 material for 2
sided boards and for multilayer boards... based upon usage in the board
manufacturers shops...

I want to specify per IPC-4101/??

The best choices would have better Tg characteristics... so I was leaning
toward IPC-4101/26 as my choice but there may be a suitable alternative that
is more commonly used that someone can point me to.

I have some old board designs that were originally build back when
MIL-P-13949 was the spec and GFN FR4 was all we had to specify...

It's time to update the notes...
Any help appreciated... :)

Best regards,

Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com
http://pcbwizards.com

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