Nitrogen-Fireable Resistors: Emerging Technology for Thick-Film Hybrids

Author

Donohue, Paul C. ; Hormadaly, Jacob ; Needes, Christopher R S ; Horowitz, Samuel J. ; Knaak, Joachim F.

Author_Institution

E.I. du Pont de Nemours and Company, Inc.,Wilmington,DE

Volume

10

Issue

4

fYear

1987

fDate

12/1/1987 12:00:00 AM

Firstpage

537

Lastpage

544

Abstract

A nitrogen-fireable base-metal thick-film resistor system compatible with copper conductors has been developed. A lanthanum hexaboride conductive phase is used to make resistor compositions in the range 10 $Omeg$ / $Box$^b$ -10 k $Omeg$ $Box$^b$ , and doped tin oxide is uses as the conductive in the 10 k $Omeg$ / $Box$^b$ - 1 M $Omeg$ / $Box$^b$ resistance range. An extensive technology transfer program to move this technology from the research laboratory to full commercial availability is under way. The environmental stability of 44 lots made in pilot, prototype, and manufacturing scale runs have been evaluated and confirm lot-to-lot reproducibility. Lanthanum boride members show good environmental stability under all conditions. Doped tin oxide members are humidity sensitive and require encapsulation. When encapsulated with an organic material, all grades show maximum changes of less than one percent after 1000 h of exposure to 85°C/85percent relative humidity.

Keywords

Rare-earth materials/devices; Thick-film resistors; Tin materials/devices; Conductors; Copper; Humidity; Laboratories; Lanthanum; Prototypes; Resistors; Stability; Technology transfer; Tin;

fLanguage

English

Journal_Title

Components, Hybrids, and Manufacturing Technology, IEEE Transactions on

Publisher

ieee

ISSN

0148-6411

Type

jour

DOI

10.1109/TCHMT.1987.1134793

Filename

1134793