Patent ID: 7488973

Claim:
A semiconductor device having a synthetic high-molecular compound, wherein the synthetic high-molecular compound covers a semiconductor element and at least part of electrical connecting means used for electrically connecting the semiconductor device to external devices; the synthetic high-molecular compound contains a compound having a three-dimensional steric structure formed by linking plural third organosilicon polymers, wherein each of the third organosilicon polymers has a molecular weight of 2×10 4 to 8×10 5 and is formed by linking a first organosilicon polymer having a crosslinked structure using siloxane (Si—O—Si combination) with a second organosilicon polymer having a linear linked structure using siloxane through siloxane bonds, with covalent bonds resulting from an addition reaction; the molecular weight of the first organosilicon polymer is lower than that of the second organosilicon polymer; the semiconductor element is selected from the group consisting of a SiC semiconductor element using a wide gap semiconductor and a GaN semiconductor element using a wide gap semiconductor, the first organosilicon polymer is selected from the group consisting of polyphenylsilsesquioxane, polymethylsilsesquioxane, polyethylsilsesquioxane, polypropylsilsesquioxane, and combinations thereof; and the second organosilicon polymer is selected from the group consisting of polydimethylsiloxane, polydiethylsiloxane, polydiphenylsiloxane, polymethylphenylsiloxane, and combinations thereof.