Patent ID: 6720620
Filing Date: 2004-04-13
Classification: H01L

Abstract:
A semiconductor on insulator substrate, comprising:a semiconductor layer of silicon alloys; an insulator layer formed of a polymer precursor to ceramic below the semiconductor layer, the polymer precursor to ceramic having the formula: [AR]n, wherein n is at least about 20, wherein A is selected from the group consisting of carbon and silicon atoms; R is the same as A or different, and is selected from the group consisting of hydrogen atoms, saturated linear or branched-chain hydrocarbons containing from about 1 to 30 carbon atoms, unsaturated ring-containing or ring hydrocarbons containing from about 5 to 14 carbon atoms in the ring, polymer chain groups having at least about 20 recurring structural units, Group 13 through 16 elements and compounds thereof, lanthanide elements, organic groups or polymers containing one or more heteroatoms of N, O, or S, Group 13 through Group 16 elements, lanthanide elements, and R can be the same or different within each recurring structural unit, the molecular weight of the polymer is at least about 10,000 daltons; the insulator layer has a thermal conductivity of at least about 100 J/mÂ° K; and a substrate layer below the insulator layer.