David N Cheng

US Patent:

6336612, Jan 8, 2002

Filed:

Feb 13, 2001

Appl. No.:

09/783862

Inventors:

Frank Taormina - El Segundo CA
Donald C.D. Chang - Thousand Oaks CA
Kar W. Yung - Torrance CA
David C. Cheng - Palos Verdes Estates CA
William W. Mayfield - Torrance CA
John Novak, III - West Hills CA
Arthur W. Wang - Cypress CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

B64G 100

US Classification:

244158R

Abstract:

A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.

US Patent:

6366103, Apr 2, 2002

Filed:

Jul 6, 1999

Appl. No.:

09/348751

Inventors:

David Cheng - Sunnyvale CA 94087

International Classification:

G01R 1073

US Classification:

324754, 324758

Abstract:

A multiple test probe system is disclosed. The multiple test probe system includes a support and a mount pivotally coupled to the support. The mount is capable of pivoting to a number of testing positions. A number of probe assemblies are coupled to the mount and associated with a corresponding number of testing positions. The probe assemblies include a number of electrical contacts coupled to a number of wires in a probe bus regardless of a testing position of the mount. The multiple test probe system further includes an actuator coupled to the mount to cause the mount to move between the testing positions.

US Patent:

6454519, Sep 24, 2002

Filed:

Mar 7, 1997

Appl. No.:

08/813480

Inventors:

Masato M. Toshima - Sunnyvale CA
Phil M. Salzman - San Jose CA
Steven C. Murdoch - Palo Alto CA
Cheng Wang - San Jose CA
Mark A. Stenholm - Fremont CA
James Howard - Santa Clara CA
Leonard Hall - San Jose CA
David Cheng - Sunnyvale CA

Assignee:

Applied Materials, Inc. - Santa Clara CA

International Classification:

B65G 4905

US Classification:

414805, 414217, 4142171, 41422201, 414939, 414940, 118719, 118500

Abstract:

A workpiece loading interface is included within a workpiece processing system which processes workpieces, typically wafers, in a vacuum. The workpiece loading interface includes two separate chambers. Each chamber may be separately pumped down. Thus, while a first cassette of wafers, from a first chamber is being accessed, a second cassette of wafers may be loaded in the second chamber and the second chamber pumped down. Each chamber is designed to minimize intrusion to a clean room. Thus a door to each chamber has a mechanism which, when opening the door, first moves the door slightly away from an opening in the chamber and then the door is moved down parallel to the chamber. After the door is opened, a cassette of wafers is lowered through the opening in a motion much like a drawbridge. The cassette may be pivoted within the chamber when the position from which wafers are accessed from the cassette differs from the position from which the cassette is lowered out of the chamber.

US Patent:

6460808, Oct 8, 2002

Filed:

Oct 23, 2001

Appl. No.:

10/008675

Inventors:

Frank Taormina - El Segundo CA
Donald C. D. Chang - Thousands Oaks CA
Kar W. Yung - Torrance CA
David C. Cheng - Palos Verdes Estates CA
William W. Mayfield - Torrance CA
John Novak, III - West Hills CA
Arthur W. Wang - Cypress CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

B64G 100

US Classification:

244158R

Abstract:

A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.

US Patent:

6643268, Nov 4, 2003

Filed:

Aug 23, 1999

Appl. No.:

09/379168

Inventors:

Kar W. Yung - Torrance CA
David C. Cheng - Palos Verdes Estates CA
Kenneth N. Gibson - Redondo Beach CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

H04L 1228

US Classification:

370254, 370216

Abstract:

A method ( ) for identifying re-routing path solutions for signals within a switch network ( ). The path solutions are subject to special constraints that provide the most desired solution for a user. The method applies an algorithm that works by transforming a global problem ( ) into many individual sub-problems ( ). The algorithm then solves the individual sub-problems ( ) systematically according to desired constraints until the global solution is met ( ). The method finds a unique state for each switch such that the overall requirements of the system are met.

US Patent:

6653853, Nov 25, 2003

Filed:

Feb 1, 2002

Appl. No.:

10/066391

Inventors:

David Cheng - Sunnyvale CA 94087

International Classification:

G01R 1073

US Classification:

324754, 324758

Abstract:

A multiple test probe system is disclosed. The multiple test probe system includes a support and a mount pivotally coupled to the support. The mount is capable of pivoting to a number of testing positions. A number of probe assemblies are coupled to the mount and associated with a corresponding number of testing positions. The probe assemblies include a number of electrical contacts coupled to a number of wires in a probe bus regardless of a testing position of the mount. The multiple test probe system further includes an indexing device coupled to the mount to cause the mount to move between the testing positions, whereby the indexing device is a multiple linear actuator assembly.

US Patent:

6766987, Jul 27, 2004

Filed:

Aug 28, 2002

Appl. No.:

10/230424

Inventors:

Frank Taormina - El Segundo CA
Donald C. D. Chang - Thousand Oaks CA
Kar W. Yung - Torrance CA
David C. Cheng - Palos Verdes Estates CA
William W. Mayfield - Torrance CA
John Novak, III - West Hills CA
Arthur W. Wang - Cypress CA

Assignee:

Hughes Electronics Corporation - El Segundo CA

International Classification:

B46G 100

US Classification:

244158R, 701226

Abstract:

A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium earth orbit. The first deployment is spaced so that the second deployment may be easily deployed and interleaved into the first deployment. A ground terminal is used for communicating with the satellites in the first and second deployments.

US Patent:

6788079, Sep 7, 2004

Filed:

Feb 1, 2002

Appl. No.:

10/066394

Inventors:

David Cheng - Sunnyvale CA 94087

International Classification:

G10R 1073

US Classification:

324754, 324758

Abstract:

A multiple test probe system is disclosed. The multiple test probe system includes a support and a mount pivotally coupled to the support. The mount is capable of pivoting to a number of testing positions. A number of probe assemblies are coupled to the mount and associated with a corresponding number of testing positions. The probe assemblies include a number of electrical contacts coupled to a number of wires in a probe bus regardless of a testing position of the mount. The multiple test probe system further includes an indexing device coupled to the mount to cause the mount to move between the testing positions, whereby the indexing device is a Geneva Mechanism.