Resistance element, its precursor, and resistance value...

Details Resistance element, its precursor, and resistance value... Resistance element, its precursor, and resistance value...

2005-05-12

2008-08-05

Lee, K. Richard (Department: 2832)

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

C338S287000, C338S292000

Reexamination Certificate

active

07408437

ABSTRACT:
An object of the invention is to provide a resistor element that makes it possible to adjust the resistance value of a precursor easily in producing a resistance element having a target resistance value from the precursor, as well as to the precursor and a related resistance value adjusting method.A precursor70has a meandering resistance pattern formed on a front surface11of a substrate10as well as at least three trimming lines. The precursor70is configured so as to be defined by a geometric sequence that satisfies Inequality 0.5αk<αk+1<αk, where αkis the general term of the sequence that is obtained by arranging, in descending order, resistance value increases of the precursor at the time of cutting of the respective trimming lines and normalizing the thus-arranged resistance value increases by an initial resistance value of the precursor in a state that none of the trimming lines are cut.

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