Resistor element having a plurality of glass layers

Details Resistor element having a plurality of glass layers Resistor element having a plurality of glass layers

1995-02-23

1997-03-11

Walberg, Teresa J.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338256, 338257, 338262, 338269, 338275, H01C 710

Patent

active

056105720

ABSTRACT:
A resistor element has a ceramic substrate and a metallic resistor coated onto the substrate. The metallic resistor has varied electrical resistance depending on temperature. A pair of leads are electrically connected to the metallic resistor. A plurality of glass layers having different compositions are coated onto the metallic resistor. The second glass layer fills a hole formed in the first glass layer, thereby improving response of the resistor element. The second glass layer has a softening point lower than the first glass layer, thereby small bubbles remain dispersed in each glass layer without aggregation. An outermost glass layer is composed of a glass resisting chemicals or a glass resisting abrasion. An innermost glass layer is composed of a glass containing up to 3 percent by mole of a sum of Na.sub.2 O and K.sub.2 O.

REFERENCES:
patent: 4282507 (1981-08-01), Tindall et al.
patent: 4909079 (1990-03-01), Nishimura et al.
patent: 5020214 (1991-06-01), Tsuruoka et al.
patent: 5124682 (1992-06-01), Ishiguro
patent: 5168256 (1992-12-01), Ishiguro et al.
patent: 5300916 (1994-04-01), Ishiguro et al.
patent: 5321386 (1994-06-01), Ishiguro
patent: 5340428 (1995-07-01), Gerblinger et al.

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