Charles H Cheng

US Patent:

6377535, Apr 23, 2002

Filed:

Oct 26, 1998

Appl. No.:

09/179279

Inventors:

Hong Chen - San Jose CA
Chuan He - Fremont CA
Carl J. Carlson - Pleasanton CA
Charles C. Cheng - Cupertino CA
Yugang Wang - Milpitas CA

Assignee:

Read-Rite Corporation - Fremont CA

International Classification:

G11B 7135

US Classification:

36911209, 369 13, 369 4423, 36911225, 36911228, 3691121

Abstract:

An optical focusing device for focusing an incident optical beam onto a focal plane, as a focal spot. The optical focusing device includes an incident central refractive facet upon which an optical beam impinges, and a high-index glass body through which the incident optical beam passes toward a bottom reflective surface. The bottom reflective surface reflects the optical beam through the body, toward a peripheral reflector. The peripheral reflector focuses the optical beam toward a focal plane on which the focal spot is formed. The focal plane is defined within a pedestal that forms part of the optical focusing device, and that extends from the bottom reflective surface. The central facet is conically shaped for refracting the incident optical beam away from the pedestal, onto the bottom reflective surface. The peripheral reflector surrounds the central facet and can have various appropriate shapes, such as an aspherical shape or a tilted parabolic shape, which compensates for the conical factor and aberrations introduced by the central facet. The top surface includes the central facet and the peripheral facet, and can be made substantially flat using diffractive optical elements or Fresnel optics.

US Patent:

7237031, Jun 26, 2007

Filed:

Mar 7, 2002

Appl. No.:

10/093308

Inventors:

Charles T. Cheng - Milpitas CA, US

Assignee:

SUN Microsystems, Inc. - Santa Clara CA

International Classification:

G06F 15/16

US Classification:

709230, 709236

Abstract:

A method and apparatus are provided for caching data for protocol processing. A protocol processing cache stores data needed for the generation of new headers, from both receive and transmit flows. Some data may be stored in the cache only after being processed (e. g. , updated, calculated) by a protocol processor. Other data may bypass the protocol processor and be stored in the cache without being handled by the protocol processor. An entry in the cache includes data needed for header generation, a tag identifying an index into a control block memory of the TCP connection to which the data corresponds. An entry may also include one or more control indicators to indicate whether a transmit flow has been acknowledged, whether a receive flow has been observed, and whether the transmit flow has been updated with control data from the receive flow. The apparatus is protocol processor independent.

US Patent:

7404058, Jul 22, 2008

Filed:

May 31, 2003

Appl. No.:

10/448960

Inventors:

John M. Lo - Fremont CA, US
Charles T. Cheng - San Jose CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F 12/00
G06F 5/10
G06F 5/16
H04L 12/56

US Classification:

711168, 711101, 711110, 711149, 711150, 710 39, 710 52, 710 54, 370229, 370412

Abstract:

A method and apparatus for enqueuing and dequeuing packets to and from a shared packet memory, while avoiding collisions. An enqueue process or state machine enqueues packets for a communication connection (e. g. , channel, queue pair, flow). A dequeue process or state machine operating in parallel dequeues packets and forwards them (e. g. , to an InfiniBand node). Packets are stored in the shared packet memory, and status/control information is stored in a control memory that is updated for each packet enqueue and packet dequeue. Prior to updating the packet and/or control memory, each process interfaces with the other to determine if the other process is active and/or to identify the other process' current communication connection. If the enqueue process detects a collision, it pauses (e. g. , for a predetermined number of clock cycles).

US Patent:

7676729, Mar 9, 2010

Filed:

Aug 23, 2006

Appl. No.:

11/508758

Inventors:

Charles Cheng - San Jose CA, US
Robert E. Cypher - Saratoga CA, US
Michael W. Parkin - Palo Alto CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G11C 29/00

US Classification:

714767

Abstract:

A memory controller, system, and methods are disclosed. The system comprises a memory controller interconnected to a plurality of memory chips. Each memory chip stores data at a plurality of locations. The memory controller performs a sparing transaction comprising reading data from a given location of one or more of the memory chips including a first memory chip, writing the data to a given location of one or more of the memory chips including a second memory chip, wherein during writing, data from the first memory chip is written to the second memory chip, and allowing additional memory transactions directed to the memory chips between the start of reading and the end of writing unless the additional memory transaction is targeted to the given location. In a further embodiment, the sparing transaction comprises correcting errors in the data before writing the data.

US Patent:

20100206247, Aug 19, 2010

Filed:

Jun 24, 2009

Appl. No.:

12/490999

Inventors:

Charles T. Cheng - San Jose CA, US
Lawrence Cheng - San Jose CA, US

International Classification:

A01K 13/00

US Classification:

119850

Abstract:

An adjustable pet raincoat and a method of using the raincoat are disclosed. An adjustable pet raincoat comprises one or more foldable torso covers and an inflatable head cover. Each torso cover has one or more sections and can be fully extended or folded. A torso cover can also be attached to another torso cover to form a bigger one to fit the size of a pet. Torso straps and a chest strap are attached to torso covers and used to anchor the pet raincoat on a pet. In a further embodiment, sections of a torso cover are connected to their neighboring sections only at their middle part of divided lines to allow flexible use of each section.

US Patent:

62297821, May 8, 2001

Filed:

Oct 26, 1998

Appl. No.:

9/179278

Inventors:

Yugang Wang - Milpitas CA
Chuan He - Fremont CA
Hong Chen - San Jose CA
Joseph J. Miceli - Saratoga CA
Charles C. Cheng - Cupertino CA
Ross W. Stovall - Fremont CA

Assignee:

Read-Rite Corporation - Fremont CA

International Classification:

G11B 700

US Classification:

36911208

Abstract:

An optical focusing device for focusing an incident optical beam onto a focal plane, as a focal spot. The optical focusing device includes an incident central refractive facet upon which an optical beam impinges, and a high-index glass body through which the incident optical beam passes toward a bottom reflective surface. The bottom reflective surface reflects the optical beam through the body, toward a peripheral reflector. The peripheral reflector focuses the optical beam toward a focal plane on which the focal spot is formed. The focal plane is defined within a pedestal that forms part of the optical focusing device, and that extends from the bottom reflective surface. The central facet is conically shaped for refracting the incident optical beam away from the pedestal, onto the bottom reflective surface. The peripheral reflector surrounds the central facet and can have various appropriate shapes, such as an aspherical shape or a tilted parabolic shape, which compensates for the conical factor and aberrations introduced by the central facet. The top surface includes the central facet and the peripheral facet, and can be made substantially flat using diffractive optical elements or Fresnel optics.

US Patent:

62121537, Apr 3, 2001

Filed:

Jan 21, 1999

Appl. No.:

9/235129

Inventors:

Hong Chen - San Jose CA
Chuan He - Fremont CA
Ross W. Stovall - Fremont CA
Charles C. Cheng - Cupertino CA

Assignee:

Read-Rite Corporation - Fremont CA

International Classification:

G11B 700

US Classification:

36911212

Abstract:

A magneto-optical head using a catadioptric focusing device comprised of an incident surface, a bottom reflective surface, a pedestal, and a body. The incident surface is generally flat and is comprised of a central diffractive, optically transmissive facet and a peripheral facet comprised of a kinoform phase profile. In a data writing or reading mode, an incident optical beam, such as a laser beam impinges upon the central facet, and is diffracted thereby. The incident laser beam can be collimated, convergent or divergent. The laser beam passes through the transparent body, and impinges upon the bottom reflective surface. The laser beam is then reflected by the bottom reflective surface, through the body, unto the kinoform phase profile. The laser beam is reflected and refracted by the peripheral kinoform phase profile as a focused beam, through the body, and is focused as a focal point. The focal point is preferably located at, or in close proximity to a pedestal edge, along a central axis, in very close proximity to the disk.

US Patent:

61307793, Oct 10, 2000

Filed:

Jul 6, 1998

Appl. No.:

9/111098

Inventors:

Carl J. Carlson - Pleasanton CA
Joseph Miceli - Saratoga CA
Hong Chen - Cupertino CA
Chuan He - Fremont CA
Charles C-K Cheng - Cupertino CA
Ross W Stovall - Fremont CA

Assignee:

Read-Rite Corporation - Fremont CA

International Classification:

G02B 518
G11B 527
G11B 700

US Classification:

359566

Abstract:

The method of making and self-aligning a magneto-optical head at a wafer level is as follows: A flat optical substrate is molded or heat pressed in batches as a wafer level to form the desired lens shapes. Coil cavities or depressions are simultaneously formed with the lens to accommodate the coil assembly. Conductive plugs are formed in proximity to the cutting lines, for wire bonding attachment to the coil. The plugs are filled with a conductive material such as copper. The plugs do not extend through the entire depth of the optical wafer, thus further facilitating the mass production of the integrated heads. The slider body wafer is formed from silicon or other appropriate material. The slider body wafer and the lens/coil wafer are bonded. Coils and pedestals are formed on the lens / coil plate using thin-film processing techniques.