Bell Telephone Laboratories

American Telephone & Telegraph Co., At&t Bell Laboratories

Edward G Spencer

Paul H Schmidt

Gary D Boyd

Klaus Jurgen Bachmann

Ross A Lemons

Joseph P Remeika

James C Phillips

Karnamadakala Sreenivasaacharlu Harsha

Computing apparatus (e.g., a neural network) advantageously comprises a programmable resistor body comprising typically a multiplicity of resistors R.sub.ij. The resistance of any given R.sub.ij is changeable from a relatively high resistance to a lower resistance by application of an appropriate electrical signal, and can be reset to a higher resistance by application of an appropriate signal of reverse polarity. Exemplarily, a programmable resistor body comprises a thin layer of bismuth oxide or strontium barium niobate.

Computing apparatus comprising a programmable resistor

Disclosed is an electro-optical device in which color changes are electrically induced in an electrochromic material which is a single or polycrystalline niobium tungstate represented approximately by the formula W.sub.9 Nb.sub.8 O.sub.47. The device comprises an ion source and a source of an electrical field which may be reversible so as to produce coloring and bleaching of the electrochromic material. Due to high corrosion resistance of such material, the ion source may conveniently be a hydrous electrolyte.

Tungsten niobate electrochromic device

Devices using a transparent conductive layer of indium oxide or indium tin oxide, and a layer of a direct gap semiconductor material have been found to operate as solar cells and as light emitting devices. Exemplary of such devices is an indium tin oxide/p-InP cell which shows a 12.5% solar power conversion efficiency and also emits a red colored light when biased.

Metal oxide/indium phosphide devices

Growing community of inventors

Berkeley Heights, NJ, United States of America

Edward G Spencer