Arden A Sher

US Patent:

40587290, Nov 15, 1977

Filed:

Jul 30, 1976

Appl. No.:

5/710296

Inventors:

Arden Sher - Williamsburg VA

International Classification:

G01T 124

US Classification:

250370

Abstract:

Radiant energy is converted into electric energy by irradiating a capacitor including a layer of an intrinsic or lightly doped semiconductor, having opposite faces on which first and second insulating layers are respectively provided. First and second metallic contacts are respectively provided on the first and second insulating layers. The radiant energy cyclically heats the dielectric to cause cyclic changes in the capacitance and resistance of the capacitor. The capacitor is initially charged to a voltage just below the breakdown voltage of the insulating and semiconductor layers by temporarily connecting it across a D. C. source to cause a current to flow through a charging resistor to the capacitor. The device can be utilized as a radiant energy detector, as well as a solar energy cell.

US Patent:

49160885, Apr 10, 1990

Filed:

Apr 29, 1988

Appl. No.:

7/187939

Inventors:

John B. Mooney - San Jose CA
Arden Sher - San Carlos CA

Assignee:

SRI International - Menlo Park CA

International Classification:

H01L 2120

US Classification:

437 81

Abstract:

A low dislocation density semiconductor device includes a first semiconductor layer of a III-V or II-VI semiconductor compound and alloying atoms on a non-metal substrate. The semiconductor compound usually has a large dislocation density. A predetermined position of the alloying atoms in the compound lattice structure can substantially reduce the compound dislocation density. Energy is applied to the alloying atoms so they are at the predetermined positions. The number of alloying atoms causes the semiconductor compound solubility limit to be exceeded. The layer is formed on a substrate of the III-V or II-VI semiconductor, such as gallium arsenide or another semiconductor, such as silicon or on an insulator such as sapphire. In the latter cases, the layer is formed on an intermediate layer having a lattice constant between that of the substrate and semiconductor compound. A second layer is epitaxially deposited on the first layer so both layers have virtually the same lattice constant and dislocation density.

US Patent:

51340429, Jul 28, 1992

Filed:

Jun 14, 1989

Appl. No.:

7/365910

Inventors:

Marc J. Madou - Palo Alto CA
Takaaki Otagawa - Fremont CA
Arden Sher - Foster City CA

Assignee:

SRI International - Menlo Park CA

International Classification:

H01M 810

US Classification:

429 13

Abstract:

The present invention relates to solid materials for use as electrolyte for a fuel cell, or for a sensor, or as a catalyst. Representative structures include lanthanum fluoride, lead potassium fluoride, lead bismuth fluoride, lanthanum strontium fluoride, lanthan strontium lithium fluoride, calcium uranium, cesium fluoride, PbSnFy, KSn. sub. 2 F. sub. 4, SrCl. sub. 2. KCl, LaOF. sub. 2, PbSnF. sub. 8. PbSnO, lanthanum oxyfluoride, oxide, calcium fluoride, SmNdFO, and the like. In another aspect, the present invention relates to a composite and a process to obtain it of the formula: A. sub. 1-y ByQO. sub. 3 having a perovskite or a perovskite-type structure as an electrode catalyst in combination with: A. sub. y B. sub. 1-y F. sub. 2+y as a discontinuous surface coating solid electrolyte solid electrolyte wherein A is independently selected from lanthanum, cerium, neodymium, praseodymium, and scandium, B is independently selected from strontium, calcium barium or magnesium, Q is independently selected from nickel, cobalt, iron or manganese, and y is between about 0. 0001 and 1, which process comprises: (a) obtaining a particulate of: A. sub. 1-y B. sub. y QO. sub.

US Patent:

45855358, Apr 29, 1986

Filed:

Mar 11, 1985

Appl. No.:

6/710586

Inventors:

Arden Sher - Belmont CA
Karen Sabo - Fremont CA

Assignee:

Savin Corporation - Stamford CT

International Classification:

C25D 1302
C25D 1500

US Classification:

2041806

Abstract:

A magnetic recording medium having a coating of magnetic particles deposited thereon by electrophoresis. Magnetic particles are encapsulated by dry milling in a thermoplastic binder which is insoluble at ambient or room temperatures and is softenable at temperatures higher than 70. degree. C. A charge director for producing functional sites in the binder is incorporated in the encapsulating polymer during the dry-milling step. The encapsulated mass is comminuted or pulverized and then wet-milled with a major amount of a low-boiling aliphatic hydrocarbon liquid. A suspension is then formed with additional hydrocarbon liquid. Additional charge director may be added, either during the wet-milling step or during the suspension-forming step. The suspension is then used as a bath from which the coating is deposited by electrophoresis. The magnetic particles are oriented by the application of a magnetic field, either during the depositing step or subsequent thereto.

US Patent:

49486802, Aug 14, 1990

Filed:

May 20, 1988

Appl. No.:

7/196498

Inventors:

Marc J. Madou - Palo Alto CA
Takaaki Otagawa - Fremont CA
Arden Sher - Foster City CA

Assignee:

SRI International - Menlo Park CA

International Classification:

H01M 810

US Classification:

429 13

Abstract:

The present invention relates to solid materials for use as solid electrolytes for a fuel cell. Specifically, the invention relates to a solid O. sup. 2- conducting material for use as an electrolyte for a fuel cell, comprising: a monocrystal or polycrystal structure of the formula: A. sub. 1-x B. sub. x Z, wherein A is independently selected from lanthanum, cerium, neodymium, praseodymium, scandium or mixtures thereof; B is independently selected from strontium, calcium, barium or magnesium, and x is between about 0 and 0. 9999, Z is selected from the group consisting of F. sub. 3-x and O. sub. c F. sub. d where F is fluorine, O is oxygen, x is between about 0 and 0. 9999 and 2c+d=3-x, wherein c is between 0. 0001 and 1.

US Patent:

46032584, Jul 29, 1986

Filed:

Nov 16, 1984

Appl. No.:

6/672365

Inventors:

Arden Sher - Belmont CA
John B. Mooney - San Jose CA

Assignee:

SRI International - Menlo Park CA

International Classification:

G01J 520

US Classification:

250370

Abstract:

A photocapacitive image detector array comprises a matrix of M. times. N spaced columns of relatively high carrier concentration extending between first and second opposite faces of a semiconductor substrate having a relatively low carrier concentration. N parallel spaced electrode stripes extend in the X direction on the first face and M parallel spaced semiconductor stripes of intermediate carrier concentration extend in the Y direction on the second face. Stripe k of the N stripes makes ohmic contacts with each of the M columns, where k=1,2,. . . N. Stripe p of the M semiconductor stripes makes contact with each of the N columns, where p=1, 2,. . . M. Each of the M regions has a depletion layer having a thickness adapted to be modulated by radiation from an image to be detected. M parallel spaced electrode stripes extend in the Y direction so that stripe q of electrode stripes M is in registration with semiconductor stripe q, where q=1, 2,. . . M. A composite insulating layer, including two insulating thin films, is sandwiched between the M electrode stripes and M semiconductor stripes.

US Patent:

42137977, Jul 22, 1980

Filed:

Mar 23, 1978

Appl. No.:

5/889514

Inventors:

Arden Sher - Williamsburg VA

International Classification:

H01L 3104

US Classification:

136 89SP

Abstract:

Radiant energy is converted into electric energy by irradiating a capacitor including an ionic dielectric. The dielectric is a sintered crystal superionic conductor, e. g. , lanthanum trifluoride, lanthanum trichloride, or silver bromide, so that a multiplicity of crystallites exist between electrodes of the capacitor. The radiant energy cyclically irradiates the dielectric so that the dielectric exhibits a cyclic photocapacitive like effect. Adjacent crystallites have abutting surfaces that enable the crystallites to effectively form a multiplicity of series capacitor elements between the electrodes. Each of the capacitor elements has a dipole layer only on or near its surface. The capacitor is initially charged to a voltage just below the dielectric breakdown voltage by connecting it across a DC source causing a current to flow through a charging resistor to the dielectric. The device can be utilized as a radiant energy detector or as a solar energy cell.

US Patent:

45298327, Jul 16, 1985

Filed:

Feb 21, 1984

Appl. No.:

6/581783

Inventors:

Arden Sher - Belmont CA
John B. Mooney - San Jose CA

Assignee:

Savin Corporation - Stamford CT

International Classification:

H01L 3106

US Classification:

136260

Abstract:

A solar cell in which the essential feature is a thin film of lead-cadmium-sulphide alloy. This alloy is preferably formed by spray pyrolysis from a solution containing the necessary ingredients. The solar cell advantageously takes the form of a homojunction constructed of two layers of lead-cadmium-sulphide alloy, with one of the layers being p-doped and the other of the layers being n-doped. The solar cell may be produced with an intrinsic layer interposed between the p-type layer and the n-type layer. The solar cell may also be made with a semiconductive layer of lead-cadmium-sulphide in contact with a metallic substrate.