Back to results
US 7,612,412 B2Granted
Semiconductor device and boost circuit
AssigneeSeiko Epson Corporation
InventorYoshiharu Ajiki
Life of this patent
Estimating the term…
Abstract
A semiconductor device, includes: a field-effect transistor that configures a charge-pump circuit; and a supporting substrate that supports the field-effect transistor so that the field-effect transistor provided on the supporting substrate becomes warpable in a channel direction.
Claims3
A booster circuit, comprising:
- a first N-channel field-effect transistor, wherein a first pulse is inputted to a gate;
- a first P-channel field-effect transistor that is serially coupled to the first N-channel field-effect transistor, wherein the first pulse is inputted to a gate;
- a second N-channel field-effect transistor, wherein a gate is coupled to a drain of the first N-channel field-effect transistor;
- a second P-channel field-effect transistor that is serially coupled to the second N-channel field-effect transistor;
- a third N-channel field-effect transistor, wherein a second pulse, which has an opposite phase to the first pulse, is inputted to a gate and a source is coupled to a drain of the second N-channel field-effect transistor;
- a third P-channel field-effect transistor that is serially coupled to the third N-channel field-effect transistor, wherein a source is coupled to a source of the second N-channel field-effect transistor and the second pulse is inputted to a gate;
- a fourth N-channel field-effect transistor wherein a gate is coupled to a drain of the third N-channel field-effect transistor and a source is coupled to a source of the second N-channel field-effect transistor;
- a fourth P-channel field-effect transistor that is serially coupled to the fourth N-channel field-effect transistor, wherein:
- a gate is coupled to a drain of the third P-channel field-effect transistor, a source is coupled to the source of the third P-channel field-effect transistor, and a drain is coupled to a source of the first P-channel field-effect transistor;
- a first capacitor that is coupled to the drain of the second N-channel field-effect transistor, whereto the first pulse is inputted;
- a second capacitor that is coupled to a drain of the fourth N-channel field-effect transistor, whereto the second pulse is inputted;
- and
- a supporting substrate, on which the first to fourth N-channel field-effect transistors;
- the first to fourth P-channel field-effect transistors;
- and the first and second capacitors are provided, that supports the first to fourth N-channel field-effect transistors and the first to fourth P-channel field-effect transistors so that each of the first to fourth N-channel field-effect transistors and the first to fourth P-channel field-effect transistors becomes warpable in a channel direction.
12 more elements
Dependencies are inferred from the claim text.