Accession Number:

AD0670901

Title:

THE EFFECTS OF POTASSIUM AND SODIUM CONTENTS IN THE CERAMIC SUBSTRATE ON THE LOAD LIVES OF FILM RESISTORS

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s):

• Wu, Yu-Ken
• Kao, Yu-Chun

Report Date:

1967-08-31

Pagination or Media Count:

18.0

Abstract:

Several film-resistor materials and the general requirements for the surface of the substrate are described. The insulation resistance of several substrates was measured. The effects of various substrates upon the load lives of three kinds of film resistors were investigated. It has been pointed out from the tests of the metal film resistor that the initial changes of the resistance were semipermanent on DC load and the electrochemical corrosion of the films was gradual and relatively long. This effect had much to do with the test conditions and could be slowed down by derating. The different of Na and K in the substrate showed quite different effects. This paper presents some possible methods for improving the DC aging performance of film resistors. By comparing the load lives of the newer and older substrates, it is considered to be very effective to add alkali-earth metal oxides as the flux for a ceramic substrate.

Descriptors:

• *SUBSTRATES
• LIFE EXPECTANCY(SERVICE LIFE)
• CERAMIC MATERIALS
• TRANSLATIONS
• CHINA
• ALKALI METAL COMPOUNDS
• FELDSPAR
• ELECTRICAL INSULATION
• RESISTORS
• POTASSIUM
• OXIDES
• SODIUM

Subject Categories:

• Electrical and Electronic Equipment
• Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE