Battery mounted integrated circuit device having diffusion layers that prevent cations serving to charge and discharge battery from diffusing into the integrated circuit region
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United States of America Patent
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Aug 7, 2007
Grant Date -
Jun 1, 2006
app pub date -
Apr 2, 2004
filing date -
Apr 4, 2003
priority date (Note) -
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Abstract
The present invention relates to a battery mounted integrated circuit device where an integrated circuit and a solid state battery are formed on the same substrate. In this battery mounted integrated circuit device, a first diffusion layer containing an N-type impurity is formed between a region of a semiconductor substrate where the solid state battery is mounted and a region of the semiconductor substrate where the integrated circuit is mounted, and a second diffusion layer containing an N-type impurity is formed below the region of the semiconductor substrate where the solid state battery is mounted, and overlaps with the first diffusion layer.
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