Electrical resistors – With base extending along resistance element – Resistance element coated on base
Reexamination Certificate
2007-10-23
2007-10-23
Lee, Richard K. (Department: 2832)
Electrical resistors
With base extending along resistance element
Resistance element coated on base
C338S309000, C338S283000, C338S195000, C340S641000
Reexamination Certificate
active
10572158
ABSTRACT:
A chip resistor is provided which includes a resistor film5formed between a pair of terminal electrodes2and3on an upper surface of an insulating substrate2. The resistor film is formed with two inward grooves7, 8and two trimming grooves9, 10which are alternately provided for causing the current path in the resistor film to have a winding shape. The two inward grooves7and8are provided approximately at the midpoint between one end edge5aand the other end edge5bof the resistor film5. The trimming groove9is provided between the inward groove8and the end edge5aof the resistor film, whereas the other trimming groove10is provided between the inward groove7and the end edge5bof the resistor film, whereby the time required for the trimming adjustment to adjust the resistance to a predetermined value is shortened, and the yield rate is reduced to reduce the cost.
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Hamre Schumann Mueller & Larson P.C.
Lee Richard K.
Rohm & Co., Ltd.
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