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Glasses for Indium Oxide Paste Resistors

IP.com Disclosure Number: IPCOM000092949D
Original Publication Date: 1967-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Fedrowitz, W: AUTHOR [+2]

Abstract

Glass paste resistors require glasses firing below 950 degrees C having expansion coefficients compatible with the substrate material. The combination of glass +In(2)O(3) gives favorable sheet resistivity values and suitable moisture stability.

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Glasses for Indium Oxide Paste Resistors

Glass paste resistors require glasses firing below 950 degrees C having expansion coefficients compatible with the substrate material. The combination of glass +In(2)O(3) gives favorable sheet resistivity values and suitable moisture stability.

Two glasses in which all these properties are optimized are shown below. The compositions of the glasses are: Wt. %

BaO 30.5 30.4

A1(2)O(3) 9.7 9.7

B(2)O(3) 10.0 10.0

SiO(2) 45.0 44.9

As(2)O(3) 0.5 0.5

Na(2)O --- 0.2

CaO 4.3 4.3

Coefficient of

Exp. 0-300 degrees C 58.5 x 10/-7/ 60.0 x 10/-7/

Soft. Pt. degrees C 822 818.

Further, a general range of values in the In(2)O(3) glass paste application is: Wt. %

BaO 8.0 - 39.0

A1(2)O(3) 8.0 - 10.0

B(2)O(3) 10.0 - 16.0

SiO(2) 40.0 - 57.0

As(2)O(3) 0.5 - 8.5

CaO 0 - .3.

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