Stock material or miscellaneous articles – Structurally defined web or sheet
Reexamination Certificate
2006-04-11
2006-04-11
Woodward, Ana (Department: 1711)
Stock material or miscellaneous articles
Structurally defined web or sheet
C361S600000, C428S221000, C428S473500, C439S607070, C524S430000, C524S538000, C525S180000
Reexamination Certificate
active
07026032
ABSTRACT:
The present invention is a polymeric composite comprising a polyimide component and a fluoropolymer component derived from a micro powder. The fluoropolymer micro powder has a melt point between 250 and 375° C. The fluoropolymer micro powder has an average particle size between 20 and 5000 nanometers (5.0 microns).The polyimide component and the fluoropolymer component are inter-mixed at a high dispersion level where the fluoropolymer component is present in a weight ratio from 10 to 60 percent. The polymeric composite of these two components is particularly useful in the form of a thin film used in high-speed digital circuitry or high signal integrity for low loss of a digital signal. The film can also be used as a wire wrap, or as a coverlay or base film substrate for flexible circuitry laminates.
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Lee Yueh-Ling
Min Gary
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