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US 5,493,148 AGranted
Semiconductor device whose output characteristic can be adjusted by functional trimming
AssigneeKabushiki Kaisha Toshiba
InventorsYu Ohata, Koichi Kitahara, Yosuke Takagi
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Abstract
A semiconductor device includes a resistor network having a plurality of trimming polysilicon resistors. The polysilicon resistors have the same width and different lengths and can be selectively fused according to the value of current which is caused to flow therein. The resultant resistance of the resistor network is changed by selectively fusing the polysilicon resistors. The output characteristic of the semiconductor device can be adjusted by changing the resultant resistance.
Claims10
A semiconductor device having an output characteristic adjustable by functional trimming, comprising:
- a plurality of trimming resistor means, each of said trimming resistor means being selectively fusible according to the value of current flowing therein;
- connecting means for connecting said plurality of resistor means together in parallel;
- a protection film formed on said plurality of trimming resistor means;
- and
- power supply means connected to said connecting means for supplying current to said plurality of resistor means, said current having a selected value sufficient to selectively fuse one or more of said plurality of resistor means.
2 more elements
Dependencies are inferred from the claim text.