Semiconductor device and method of manufacturing the same

Semiconductor device manufacturing: process – Chemical etching – Combined with coating step

Reexamination Certificate

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Reexamination Certificate

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06921718

ABSTRACT:
A semiconductor device includes a semiconductor substrate and an electrode disposed on a major surface of the semiconductor substrate. A via hole is formed on a center of the electrode so as to open from a surface of the electrode to a place under the surface of the semiconductor substrate. A via-hole foundation electrode for inhibiting diffusion from a metal layer is formed inside the via hole and on the surface of the electrode, a via-hole electrode is formed on the surface of the via-hole foundation electrode. A back via hole is formed on the back of the semiconductor substrate opposite to the major surface thereof, and opened from the back of the semiconductor substrate to the via-hole electrode. A back via-hole electrode is formed on the back of the semiconductor substrate including the inside of the back via hole.

REFERENCES:
patent: 6225651 (2001-05-01), Billon
patent: 6284644 (2001-09-01), Aug et al.
patent: 10-64923 (1998-03-01), None

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