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Date: | Fri, 20 Aug 2004 09:02:17 +0200 |
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We use both Rogers materials, but make no caps.
You did not mention whatparameter did not work.
Anyway, compare with this one:
moisture uptake: 0.15
epsilon 1 M 3.3
ditto 1 G 4
tand 0.02
Tg 320 C
useful 280 C
lambda 1.9 W/mK
diel stab 100 ppm
asperity 0.1 um
min diel layer 30 um
xy 20 ppm
z 100 ppm
Name: Vectran
Not equiv with R, but depends on what you look for.
got a lot about V, send you offline
Ingemar Hernefjord
Ericsson Microwave Systems
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Colin Weber
Sent: den 20 augusti 2004 06:37
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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