Accession Number : AD0638416

Title :   PREPARATION OF THIN-FILM TUNNELING STRUCTURES.

Descriptive Note : Technical rept.

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Cabell,S. ; Dobischek,D.

Report Date : AUG 1966

Pagination or Media Count : 28

Abstract : Vacuum deposition techniques were developed for the preparation of thin-film metal-insulator-metal structures, and the tunneling capabilities of these structures were explored by testing them for their V-I characteristics. The structures primarily investigated were A1-SiO-A1 and A1-SiO-Au structures. A limited number of experiments were performed with A1-A12O3-A1 samples. Various methods described in detail in the report were used for forming the films. The thickness of the films was monitored using a laboratory-made quartz crystal oscillator as well as a commercially available instrument. Automatic control of the deposition rate and the thickness of the films was attempted and the reliability of the method explored. The A1-A12O3-A1 structures showed poor results when tested for their V-I characteristics. The breakdown strength of the samples was insufficient. Applied voltages of only a few tenths of a volt caused instant dielectric breakdown. Far better results were obtained with the structures in which SiO served as the insulator. The best structures displayed stable, tunneling-like V-I characteristics. Also, the lifetime of the devices was improved. (Author)

Descriptors :   (*FILMS, *TUNNELING(ELECTRONICS)), (*VAPOR PLATING, FILMS), VACUUM PUMPS, VACUUM APPARATUS, METAL FILMS, ALUMINUM, SILICON COMPOUNDS, OXIDES

Subject Categories : Fabrication Metallurgy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE