Capacitance type sensor
First Claim
1. A capacitance type sensor comprising:
- a semiconductor substrate having a cavity inside by forming an upper wall and a bottom wall, and having a surface portion forming the upper wall of the cavity and a back surface portion forming the bottom wall; and
a first electrode and a second electrode that are formed by processing the surface portion of the semiconductor substrate and have comb-tooth-like shapes to engage with each other at an interval, wherea change in capacitance between the first electrode and the second electrode is detected.
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Accused Products
Abstract
A capacitance type gyro sensor includes a semiconductor substrate, a first electrode integrally including a first base portion and first comb tooth portions and a second electrode integrally including a second base portion and second comb tooth portions, formed by processing the surface portion of the semiconductor substrate. The first electrode has first drive portions that extend from opposed portions opposed to the respective second comb tooth portions on the first base portion toward the respective second comb tooth portions. The second electrode has second drive portions formed on the tip end portions of the respective second comb tooth portions opposed to the respective first drive portions. The first drive portions and the second drive portions engage with each other at an interval like comb teeth.
25 Citations
15 Claims
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1. A capacitance type sensor comprising:
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a semiconductor substrate having a cavity inside by forming an upper wall and a bottom wall, and having a surface portion forming the upper wall of the cavity and a back surface portion forming the bottom wall; and a first electrode and a second electrode that are formed by processing the surface portion of the semiconductor substrate and have comb-tooth-like shapes to engage with each other at an interval, where a change in capacitance between the first electrode and the second electrode is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification