Accession Number : ADD014244

Title :   Method of Sensitizing PB-Salt Epitaxial Films for Schottky Diodes.

Descriptive Note : Patent, Filed 27 Jul 88, patented 1 Aug 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Chu, Tak-Kin ; Santiago, Francisco

Report Date : 01 Aug 1989

Pagination or Media Count : 7

Abstract : This invention relates to photodetectors and more particularly to infrared-sensitive photodiodes. It is well established that single crystal films of lead chalcogenides, lead tin chalcogenides, and lead cadmium chalcogenides can be epitaxially grown on heated alkali metal halide substrates by vacuum evaporation. The chalcogenides used include the sulfides, selenides, tellurides, and mixtures thereof. The substrates are single crystals of infrared transparent alkali metal halides and alkaline earth halides. Examples include barium fluoride, strontium fluoride, calcium fluoride, lithium fluoride, sodium chloride, potassium chloride, etc. It is also well known that the vacuum deposition of a metal contact of certain materials such as lead or indium, on the surface of an epitaxial layer of a led chalcogenide, lead tin chalcogenide, or lead cadmium chalcogenide creates a non-Ohmic Schottky barrier at the point of contact, resulting in an infrared sensitive photodiode. Patents. (RRH)

Descriptors :   *CHALCOGENS, *DIODES, *EPITAXIAL GROWTH, *FILMS, *LAYERS, *PATENTS, *PHOTODETECTORS, *PHOTODIODES, *SCHOTTKY BARRIER DEVICES, *SINGLE CRYSTALS, *SUBSTRATES, *VACUUM DEPOSITION, ALKALINE EARTH COMPOUNDS, BARIUM HALIDES, CADMIUM, CALCIUM FLUORIDES, EVAPORATION, FLUORIDES, HALIDES, INDIUM, INFRARED RADIATION, LEAD COMPOUNDS, LITHIUM FLUORIDES, METAL CONTACTS, POTASSIUM CHLORIDE, SELENIDES, SENSITIVITY, SODIUM CHLORIDE, STRONTIUM, SULFIDES, TELLURIDES, TIN, TIN COMPOUNDS, VACUUM

Subject Categories : Solid State Physics
      Electrical and Electronic Equipment
      Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE