Hopefully my lil nugget of info will help.....

FR-1-A low-grade version of FR-2.

FR-2-A NEMA grade of Flame-Retardant industrial laminate having a substrate
of paper and a resin binder of phenolic. It is suitable for printed circuit
board laminate and cheaper than the woven glass fabrics such as FR-4.

FR-4-A NEMA grade of Flame-Retardant industrial laminate having a substrate
of woven-glass fabric and resin binder of epoxy. FR-4is the most common
dielectric material used in the construction of PCBs.

FR-6- Fire-Retardant glass-and-polyester substrate material for electronic
circuits. Inexpensive; popular for automobile electronics.

Those wanting to be really "Geeked" up...Hopefully this will give a little
more insight: http://www.ilnorplex.com/quickref.htm

Regards,
Cal
Communications Test Design, Inc.
www.CTDI.com

-----Original Message-----
From: Jason W. Gregory [mailto:[log in to unmask]]
Sent: Wednesday, September 10, 2003 12:10 PM
To: [log in to unmask]
Subject: Re: [TN] FR-4


Jim

Right you are...."resistant". Maybe I'm retardant.

Jason Gregory



                      Jim Geer
                      <Jgeer@PRIME-MEASU        To:       [log in to unmask]
                      REMENT.COM>               cc:
                      Sent by: TechNet          Subject:  Re: [TN] FR-4
                      <[log in to unmask]>


                      09/10/2003 11:08
                      AM
                      Please respond to
                      "TechNet E-Mail
                      Forum."; Please
                      respond to Jim
                      Geer

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