MIL-P-18177 is a pre-curser to MIL-P-13949.  In the early years of epoxy
systems, they did not have flame resistance, which was found to be an
issue quickly.  When the DOD began to develop a specification for a
flame resistance system, they opted to create a new spec - MIL-P-13949
rather that revise the old spec as several manufactures still were
producing to 18177 and could not produce a new epoxy at that time.
Eventually (1992) this spec was cancelled without replacement.  

Jeffrey Bush
Director, Quality Assurance and Technical Support

VERMONT CIRCUITS INCORPORATED
  76 Technology Drive - POB 1890
    Brattleboro, Vermont 05302
      Voice: 802.257.4571.21 Fax: 802.257.0011
           http://www.vtcircuits.com
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Parsons
Sent: Friday, October 14, 2005 10:59 AM
To: [log in to unmask]
Subject: [TN] MIL-P-18177

Good morning all,

I have a customer spec'ing a PCB from laminate meeting MIL-P-18177/GEE.
I
can't seem to find a copy of the MIL-P-18177 spec but an internet search
turns up reference to this spec and FR-4/G10 materials.  None of my
material
spec sheets make reference however.  Can anyone shed some light on this
requirement.

TIA

John Parsons

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