RuO.sub.2 resistor paste, substrate and overcoat system

Details RuO.sub.2 resistor paste, substrate and overcoat system RuO.sub.2 resistor paste, substrate and overcoat system

1997-11-26

1999-09-21

Donovan, Lincoln

Electrical resistors

With base extending along resistance element

Resistance element coated on base

338309, 338314, 338254, H01L 1012

Patent

active

059559381

ABSTRACT:
A ceramic circuit substrate having a resistor deposited on a surface thereof, said ceramic substrate having a coefficient of thermal expansion ranging from 5.0.times.10.sup.-6 /.degree. C. to 7.0.times.10.sup.-6 /.degree. C., the resistor being coated with a glass overcoat and made of 15 to 50% of RuO.sub.2 and 85 to 50% of a CaO--Al.sub.2 O.sub.3 --SiO.sub.2 --B.sub.2 O.sub.3 -system glass, the glass overcoat being made of 60 to 100% of a CaO--Al.sub.2 O.sub.3 --SiO.sub.2 --B.sub.2 O.sub.3 -system glass and up to 40% of alumina, wherein the resistor has a coefficient of thermal expansion greater than that of the glass overcoat. Due to the above specific relationship between the coefficient of thermal expansion of the resistor and that of the overcoat, the resistor is not subject to cracking at the time of trimming and thereafter, and realizes the exertion of resistance performance ensuring excellent weather resistance and stability.

REFERENCES:
patent: 3304199 (1967-02-01), Faber, Sr. et al.
patent: 3699650 (1972-10-01), Cocca
patent: 4415624 (1983-11-01), Prabhu et al.
patent: 4499011 (1985-02-01), Boonstra et al.
patent: 5216207 (1993-06-01), Prabhu et al.
patent: 5474711 (1995-12-01), Borland et al.
Fedrowitz et al. Glasses for Indium Oxide Paste Resistors, IBM TDB vol. 9, No. 11, p. 1477 (Apr. 1967).
Masashi Fukaya, et al; 1997 International Symposium on Microelectronics, pp. 65-71 (Oct. 1997).

Affiliated with

Also associated with

Rating

RuO.sub.2 resistor paste, substrate and overcoat system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with RuO.sub.2 resistor paste, substrate and overcoat system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RuO.sub.2 resistor paste, substrate and overcoat system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-84016