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US 6,649,463 B2Granted
Regulating resistor network, semiconductor device including the resistor network, and method for fabricating the device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYukio Iwasaki, Hidetoshi Furukawa, Tsuyoshi Tanaka, Daisuke Ueda
Life of this patent
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Abstract
A regulating resistor network includes a plurality of resistors connected in parallel to each other. Each of these resistors is cuttable by being irradiated with light, and a resistance value of the regulating resistor network is adjustable by cutting at least one of the resistors off.
Claims6
A method for fabricating a semiconductor device, comprising the steps of:
- a) forming a semiconductor circuit and a regulating resistor network on a semiconductor substrate, the resistor network including a plurality of resistors and regulating a voltage or a current supplied to the semiconductor circuit, each of said plurality of resistors being cuttable by being irradiated with light;
- and
- b) cutting at least one of said plurality of resistors off by irradiating the resistor with the light, thereby adjusting a resistance value of the regulating resistor network,
- wherein, each of said plurality of resistors is connected in parallel to each other and has a different resistance value due to mutually different length.
1 more element
Dependencies are inferred from the claim text.