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August 2004

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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, 20 Aug 2004 07:33:07 -0400
Content-Type:
text/plain
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text/plain (69 lines)
I would look at Arlons 25N. 

http://www.arlon-med.com/micro.html



Jeffrey Bush
Director, Quality Assurance and Technical Support

                          76 Technology Drive - POB 1890
                             Brattleboro, Vermont 05302-1890
                                Tel. 802.257.4571.21 Fax. 802.257.0011
                                    [log in to unmask]
                              http://www.vtcircuits.com	



-----Original Message-----
From: Colin Weber [mailto:[log in to unmask]] 
Sent: Friday, August 20, 2004 12:37 AM
To: [log in to unmask]
Subject: [TN] Search for HF Laminate Material


Hi Folks,

Does anybody know of a material which can meet or exceed the following
specifications for a Rogers RO4003C, which has UL approval (94V-0)?

Dielectric Constant 3.38 +-0.05
Dissipation Factor tan 0.0027/0.0021
Temperature Coefficient +40 ppm/deg. C
Coefficient of Thermal Expansion x=11, Y=14, Z=46 ppm/deg. C water
absorption 0.04%

FR4 standard Processing

The application is for making capacitors out of PCB material. The Rogers
RO4350B UL material did not perform as well as the RO4003C.



Regards,

Colin Weber

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