Micromachine
First Claim
Patent Images
1. An electrostatic motor, comprising:
- a semiconductor substrate rotatable around a central axis thereof; and
at least one drive electrode disposed at a specified position in proximity to said semiconductor substrate;
said semiconductor substrate having electromagnetic wave-static electricity converters each comprising a p-n junction, said converters being individually disposed at a plurality of angularly-spaced portions around said substrate axis, said drive electrode being opposed to a path through which electromagnetic wave irradiation regions formed on the respective converters move with the rotation of said substrate, an electromagnetic wave traveling channel being disposed at one side of said drive electrode and extending to said irradiation region of said converter adjacent to another one of said converters opposed to said drive electrode, said semiconductor substrate being rotatable by an electrostatic force between a surface portion of said drive electrode and an adjacent surface portion of said converter irradiated with electromagnetic wave through said channel.
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Accused Products
Abstract
An electrostatic motor for use as a power generating mechanism to be mounted on a micromachine includes a rotatable semiconductor substrate and a drive electrode disposed in proximity to the substrate. The semiconductor substrate is doped with a specified impurity element to form electromagnetic wave-static electric converters of p-n junction. When the motor is to be started, the converter in the vicinity of the electrode is irradiated with electromagnetic waves to set up an electric field between the opposed surfaces of the converter and the electrode to rotate the substrate by an electrostatic force due to the electric field.
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Citations
14 Claims
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1. An electrostatic motor, comprising:
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a semiconductor substrate rotatable around a central axis thereof; and at least one drive electrode disposed at a specified position in proximity to said semiconductor substrate; said semiconductor substrate having electromagnetic wave-static electricity converters each comprising a p-n junction, said converters being individually disposed at a plurality of angularly-spaced portions around said substrate axis, said drive electrode being opposed to a path through which electromagnetic wave irradiation regions formed on the respective converters move with the rotation of said substrate, an electromagnetic wave traveling channel being disposed at one side of said drive electrode and extending to said irradiation region of said converter adjacent to another one of said converters opposed to said drive electrode, said semiconductor substrate being rotatable by an electrostatic force between a surface portion of said drive electrode and an adjacent surface portion of said converter irradiated with electromagnetic wave through said channel. - View Dependent Claims (2, 3, 4, 5, 8)
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- 6. An electrostatic motor comprising a rotor made of a said semiconductor substrate and rotatable around a central axis thereof, and a stator made of a said semiconductor substrate and disposed at a specified position coaxially with said axis of said rotor, each of said rotor and said stator having a plurality of blades extending radially thereof and orthogonal to said axis, said blades of said rotor being opposed to said blades of said stator axially of said axis in lapping relation with a small distance provided therebetween, each of said blades being formed with an electromagnetic wave-static electricity converter of p-n junction to make opposed surfaces of said rotor blade and said stator blade opposite in polarity, said rotor being rotatable with an electrostatic force produced between said opposed blades by irradiating said converters of said rotor and said stator with electromagnetic wave from one direction along said axis.
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9. An electrostatic motor, comprising:
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a semiconductor substrate rotatable around a central axis thereof; and at least one drive electrode disposed at a specified position in proximity to said semiconductor substrate; said semiconductor substrate having electromagnetic wave-static electricity converters each comprising a p-n junction in which a p-doped portion of said semiconductor substrate extends substantially orthogonally to the rotational axis of said semiconductor substrate in a first disk-shaped region thereof, and a p-doped portion of said semiconductor substrate extends substantially orthogonally to the rotational axis of said semiconductor substrate in a second disk-shaped region thereof, said converters being individually disposed at a plurality of angularly-spaced portions around said substrate axis, said drive electrode being opposed to a path through which electromagnetic wave irradiation regions formed on the respective converters move with the rotation of said substrate, an electromagnetic wave traveling channel being disposed at one side of said drive electrode and extending to said irradiation region of said converter adjacent to another one of said converters opposed to said drive electrode, said semiconductor substrate being rotatable by an electrostatic force between a surface portion of said drive electrode and an adjacent surface portion of said converter irradiated with electromagnetic wave through said channel. - View Dependent Claims (10, 11)
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12. An electrostatic motor, comprising:
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a semiconductor substrate rotatable around a central axis thereof; and at least one drive electrode disposed at a specified position in proximity to said semiconductor substrate; said semiconductor substrate having electromagnetic wave-static electricity converters each comprising a p-n junction in which one of a p-doped portion and an n-doped portion of said semiconductor substrate extends substantially orthogonally to the rotational axis of said semiconductor substrate in a first disk-shaped region thereof, and the other of the p-doped portion and the n-doped portion of said semiconductor substrate extends annularly about the rotational axis of said semiconductor substrate, said converters being individually disposed at a plurality of angularly-spaced portions around said substrate axis, said drive electrode being opposed to a path through which electromagnetic wave irradiation regions formed on the respective converters move with the rotation of said substrate, an electromagnetic wave traveling channel being disposed at one side of said drive electrode and extending to said irradiation region of said converter adjacent to another one of said converters opposed to said drive electrode, said semiconductor substrate being rotatable by an electrostatic force between a surface portion of said drive electrode and an adjacent surface portion of said converter irradiated with electromagnetic wave through said channel. - View Dependent Claims (13, 14)
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Specification