Title:
POWER RESISTOR AND POWER RESISTOR DEVICE
Document Type and Number:
Japanese Patent JP3422889
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a resistor having a high heat capacity per unit vol. and low variation per hour of its value at high temp. by reducing the resistance value of electrode-adjacent portions of a pair of main faces of a sintered block contg. Al2O3 as a main and specified amount of C as a sub-component, than that of the interior part of the block.
SOLUTION: A power resistor is a sintered block contg. Al2O3 as a main and C 0.3-5wt.% as a sub-component which has electrodes at a pair of its main faces and the resistance value of the portions adjacent to the electrodes is lower than that of the interior of the block or 0.5-0.05 times that of the block center. A power resistor device is composed of a plurality of resistors, each is a sintered block contg. Al2O3 as a main and C 0.3-5wt.% as a sub-component and having regions different in C content which has electrodes at a pair of its main faces and the resistivity of the portions adjacent to the electrodes is lower than that of the interior of the block.
More Like This:
| JPS59214667 | THERMAL HEAD |
| JPS6154657 | HYBRID INTEGRATED CIRCUIT |
Inventors:
Motoma Imai
Naoki Shuto
Fumio Ueno
Naoki Shuto
Fumio Ueno
Application Number:
JP6061396A
Publication Date:
June 30, 2003
Filing Date:
March 18, 1996
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H01C7/00; (IPC1-7): H01C7/00
Domestic Patent References:
| JP845702A | ||||
| JP817604A | ||||
| JP4997262A |
Attorney, Agent or Firm:
Hideaki Togawa
Previous Patent: SPOT TESTING METHOD FOR ALUMINUM IONIC SAMPLE
Next Patent: PRODUCTION OF HOT ROLLED STEEL PLATE
Next Patent: PRODUCTION OF HOT ROLLED STEEL PLATE