Patent ID: 8021745
Filing Date: 2011-09-20
Classification: C08J,D21H,Y10T

Abstract:
1. An article, wherein said article is a semiconductor manufacture component comprising: (a) about 70 wt % to about 90 wt % of a thermoplastic polymer; (b) about 10 to about 30 wt % of chopped carbon fiber; (c) 0.001 to about 10% of a sizing agent selected from the group consisting of polyvinylpyrrolidone, polyvinyl alcohol, copolyvinyl alcohol, copolyvinyl acetate, copolyvinyl alcohol-acetate and sodium carboxymethyl cellulose, optionally further comprising (d) less than 2,000 nanomoles per gram of sodium, potassium, calcium, and aluminum, combined; wherein the wt % in each of (a), (b) and (c) is based on the total weight of the component; wherein said thermoplastic polymer (a), said chopped carbon fiber (b) and said sizing agent (c) are a mixture present in the form of a densified matte; and wherein said article has a coefficient of thermal expansion in the XY direction of about 10 ppm/K and a coefficient of thermal expansion in the Z direction which can be greater or less than in the XY direction.