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US 2015/0311197 A1Published application
Semiconductor device, switching power supply control ic, and switching power supply device
AssigneeFuji Electric Co., Ltd.
InventorMasaru SAITO
Life of this patent
Estimating the term…
Abstract
A semiconductor device has a configuration wherein a resistor that restricts overvoltage is inserted between an input terminal and the drain of JFETs, and the resistor is disposed on the JFETs. Also, the resistor is formed contiguously and integrally with a spiral form high breakdown voltage high resistance element that configures a resistive voltage divider circuit.
Claims16
A semiconductor device, comprising:
- a lateral junction field effect transistor formed in an upper portion of a semiconductor substrate;
- a dielectric provided on the junction field effect transistor;
- relay wiring, provided on the dielectric, to which voltage is applied from the exterior;
- and
- a first resistor element, connected between the drain of the junction field effect transistor and the relay wiring, provided inside the dielectric on the junction field effect transistor.
2 more elements
A semiconductor device, comprising:
- a second conductivity type drift region formed in an upper portion of a first conductivity type semiconductor substrate;
- a drain electrode connected to the drift region;
- a second conductivity type source region provided in contact with the drift region in an upper portion of the semiconductor substrate around the drift region;
- a first conductivity type gate region disposed in contact with the drift region in an upper portion of the semiconductor substrate;
- a dielectric formed on the surface of the drift region;
- a gate electrode connected to the gate region;
- a source electrode connected to the source region;
- relay wiring, provided on the semiconductor substrate, to which voltage is applied from the exterior;
- and
- a first resistor element, connected between the drain electrode and the relay wiring, embedded inside the dielectric on the drift region.
7 more elements
Dependencies are inferred from the claim text.