THIN FILM THERMISTORS.
Abstract
The effect of thickness on the surface resistivity and ratio has been determined and in general the thinner the film, the higher the material at this time seems to be gold. The leads can be successfully soldered onto the gold by the use of No. 2 solder as supplied by the Indium Corporation of America using a rosin flux. Welded leads are possible on glazed substrates but at present some difficulty is evident on unglazed substrates. Platinum and gold mushes have been found to be not acceptable. The problem of the change in chemical composition through the target material has been reduced and relatively stable targets are now being produced. Aging results show that thermistor material sputtered onto glazed substrates are not stable due to the alkali content in the glaze attacking the thermistor material. Thermistors sputtered onto unglazed beryllium oxide substrates have shown excellent aging characteristics over a 1 month period. The sputtering in a gas containing 5% oxygen resulted in excellent units.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 23, 1965
- Accession Number
- AD0484190