Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having a component wherein a constituent is liquid...
Patent
1999-05-03
2000-11-14
Lam, Cathy F.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having a component wherein a constituent is liquid...
428209, 428323, 428327, 428339, 174259, 106 1444, 257783, B32B 326
Patent
active
061467499
ABSTRACT:
A low dielectric constant composition with a dielectric constant of 4 or less is disclosed. The composition comprises a matrix resin and crosslinked resin particles having an average particle diameter in the range from 0.03 to 10 .mu.m, the crosslinked resin particles being prepared by the polymerization of 1-100 wt % of cross-linking monomers and 0-99 wt % of non-cross-linking monomers, having a dielectric constant of 3 or less, and having a 50 ppm or less average concentration of metal ions. The composition exhibits superior insulation properties and capable of producing an insulating material and sealing material with a low dielectric constant and low dielectric loss tangent (tan .delta.). An insulating material and a sealing material comprising this low dielectric composition and a circuit board provided with the insulating material or sealing material are also disclosed.
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Hiraharu Teruo
Ito Nobuyuki
Miyamoto Masahiro
JSR Corporation
Lam Cathy F.
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