Donald G Rogers

US Patent:

46861165, Aug 11, 1987

Filed:

Feb 21, 1986

Appl. No.:

6/831602

Inventors:

Steven F. Rickborn - San Jose CA
Donald Z. Rogers - Menlo Park CA

Assignee:

Northrop Corporation - Hawthorne CA

International Classification:

B05D 700
C23C 1626

US Classification:

427215

Abstract:

A method is set forth of chemically vapor depositing a substantially uniform carbonaceous film on to each of a plurality of small refractory particles. Uncoated small refractory particles are intimately intermixed with an organic precursor in liquid or solid form, the intermixing being at a temperature below the sublimation, boiling or decomposition temperature of the precursor. The resulting intimate intermixture is subjected to a temperature of 700. degree. C. to 1200. degree. C. in a deposition zone which is substantially oxygen-free. Residence time in the deposition zone is restricted to be less than that which would deleteriously effect properties of the resulting coated particles. The organic precursor, under the residence time and temperature conditions in the deposition zone, is substantially completely converted by sublimation, boiling and/or decomposition to one or more vaporous species. The organic precursor is selected to either (1) sublime or boil at a temperature in excess of about 400. degree. C.

US Patent:

58501452, Dec 15, 1998

Filed:

Sep 9, 1996

Appl. No.:

8/707848

Inventors:

Gregory D. Burroughs - Sunnyvale CA
Edward G. Weaver - Sunnyvale CA
Donald L. Rogers - San Jose CA

Assignee:

Hewlett-Packard Co. - Palo Alto CA

International Classification:

G01R 3128

US Classification:

324751

Abstract:

A method and apparatus for soft error comparison testing of electronic components exposed to a flux of high energy particles, while providing for simultaneous comparison testing of different components at full rated operating speed, and providing for programmable control of level of the supply voltage applied to the components. Included a method and apparatus for simultaneously exposing electronic components to a flux of high energy particles, operating the components, and simultaneously measuring soft errors of the components induced by the flux of high energy particles.

US Patent:

48186074, Apr 4, 1989

Filed:

May 8, 1987

Appl. No.:

7/048531

Inventors:

Steven F. Rickborn - San Jose CA
Donald Z. Rogers - Menlo Park CA

Assignee:

Northrop Corporation - Hawthorne CA

International Classification:

B32B 516
C04B 3552

US Classification:

428323

Abstract:

The present invention provides an electrically conductive material (10) comprising a substantially spherical refractory particle (12) having an exterior surface (14) and having a diameter of no more than about 5 millimeters. An electrically conducting coating (22) substantially equally covers the entire exterior surface (14), the coating (22) having at least about 70 atomic percent carbon and being from about 10 Angstroms to about 500 Angstroms thick. A plurality of such particles (12) are useful as filler materials. Also, such particles (12) are useful as flowing electrodes. Objects containing the particles (12) have desirable electrical properties.

US Patent:

50518950, Sep 24, 1991

Filed:

Sep 22, 1989

Appl. No.:

7/412542

Inventors:

Donald L. Rogers - San Jose CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06F 1516

US Classification:

364200

Abstract:

A method and apparatus for tracking and identifying printed circuit assemblies is presented. Information about each printed circuit assembly (PCA), including the current revision level of the PCA is stored within a non-volatile random access memory (RAM) within each PCA. The stored information may be accessed by a user through a dedicated bus and hardware designed for this task. Additionally, through the dedicated bus and hardware, the user may update the information within the printed circuit assembly.

US Patent:

47228601, Feb 2, 1988

Filed:

Nov 24, 1986

Appl. No.:

6/935630

Inventors:

Frank A. Doljack - Pleasanton CA
Donald Z. Rogers - Menlo Park CA
Steven F. Rickborn - Campbell CA
Sheldon L. Matlow - San Jose CA

Assignee:

Northrop Corporation - Hawthorne CA

International Classification:

B65G 4300

US Classification:

428260

Abstract:

A flexible electrically conducting cloth is described which comprises a plurality of intermingled or interwoven refractory fibers the sheet resistance of which exceeds 1,000 ohms per square inch and a conducting coating encapsulating a majority of the fibers, the coating including at least about 70 atomic percent carbon and being applied in sufficient quantity to render the cloth electrically conducting with a sheet resistance which lies between about 0. 1 ohm per square inch and about 1,000 ohms per suqare inch. The cloth is useful as an electrical resistance heater, an electromagnetic shield, an electromagnetic reflector, or as an antenna. It is formulated by contacted substantially the entire surfaces of the intermingled or interwoven fibers with a carbon containing precursor, the fibers being at a temperature between about 700. degree. C. and 1200. degree. C. , whereby the fibers are covered with a pyrolyzed coating formed from the precursor in an amount of at least about 0. 001 weight percent.