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June 2006

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Subject:
From:
Jeffrey Bush <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]>
Date:
Fri, 30 Jun 2006 13:09:20 -0400
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In the early days of laminate all were difunctional - simple polymer
chains bonding the package together.  Tetrafunctional had bonding
formats in 2  polymer chains - thus called Tetra because the 2 chains
linked have 4 ends.

Polyclad developed a material called Tetra II in the mid 1980's and this
was a tetrafunctional resin that had a Tg of 170 F.  This was the basis
for the current system used in the FR-370.  

As laminate/resin developers began to improve on the tetrafunctional
systems by blending resins to improve performance, they began the term
these  multifunctional systems.  Multifunctionals are by design
tetrafunctional and I would use the term interchangeably.
      

Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED 
           76 Technology Drive - POB 1890 
              Brattleboro, Vermont 05302
                Voice - 802.257.4571 ext 21
                    Fax - 802.257.0011
                       <http://www.vtcircuits.com/> 
                           
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Eddie Rocha
Sent: Friday, June 30, 2006 11:46 AM
To: [log in to unmask]
Subject: [TN] tetra-functional vs multi-functional

What's the difference between a tetra-functional laminate
and a multi-functional laminate? Any performance
differences? When would somebody specify a multi-functional
over a tetra-functional? Are they inter-changeable?

Thank you in advance,
Eddie Rocha

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