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Semiconductor device and fabrication method

Image Number 4 for United States Patent #6051877.

A thin-film semiconductor device comprising at least a semiconductor element and a wiring is disclosed. A thin film of a protective insulating material is formed on the lower surface of the semiconductor element, and a substrate is bonded on the lower surface of the thin film. A method for fabricating the thin-film semiconductor device is also disclosed, in which a thin-film semiconductor circuit is formed on a silicon-on-insulator wafer, the silicon substrate on the reverse side of the silicon-on-insulator wafer is etched off, a thin-film semiconductor chip is formed and attached to the substrate, and the thin-film semiconductor chip and the substrate are wired to each other by printing.

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