Eugene Chen, 28Colorado Springs, CO

6469314, Oct 22, 2002

Dec 21, 1999

09/467941

Patrick N. Grillot - Santa Clara CA
Eugene I. Chen - Santa Clara CA
Jen-Wu Huang - Santa Clara CA
Stephen A. Stockman - Morgan Hill CA

LumiLeds Lighting U.S., LLC - San Jose CA

H01L 3100

257 15, 257 14, 257 94, 257102, 257103, 257104

An LED and a method of fabricating the LED which utilize controlled oxygen (O) doping to form at least one layer of the LED having an O dopant concentration which is correlated to the dominant emission wavelength of the LED. The O dopant concentration is regulated to be higher when the LED has been configured to have a longer dominant emission wavelength. Since the dominant emission wavelength is dependent on the composition of the active layer(s) of the LED, the O dopant concentration in the layer is related to the composition of the active layer(s). The controlled O doping improves the reliability while minimizing any light output penalty due to the introduction of O dopants. In an exemplary embodiment, the LED is an AlGaInP LED that includes a substrate, an optional distributed Bragg reflector layer, an n-type confining layer, an optional n-type set-back layer, an active region, an optional p-type set-back layer, a p-type confining layer and an optional window layer. In a preferred embodiment, the active region includes a multiplicity of active layers, where each active layer is 125 Angstroms thick or less and the active layers are separated from each other by barrier layers whose composition is Al In P and whose thickness is 100 Angstroms or less. In a preferred embodiment, both the p-type confining layer and the p-type set-back layer are doped with a controlled amount of O, depending on the dominant emission wavelength of the LED.

6504171, Jan 7, 2003

Jan 24, 2000

09/490777

Patrick N. Grillot - Santa Clara CA
Christopher P. Kocot - Palo Alto CA
Michael R. Krames - Mountain View CA
Eugene I. Chen - Santa Clara CA
Stephen A. Stockman - Morgan Hill CA
Robert C. Taber - Palo Alto CA

Lumileds Lighting, U.S., LLC - San Jose CA

H01L 2906

257 14, 257 13, 257 15, 257 17, 257 22, 257 86, 372 17, 372 45, 372 50, 438 22

A light emitting device and a method of increasing the light output of the device utilize a chirped multi-well active region to increase the probability of radiative recombination of electrons and holes within the light emitting active layers of the active region by altering the electron and hole distribution profiles within the light emitting active layers of the active region (i. e. , across the active region). The chirped multi-well active region produces a higher and more uniform distribution of electrons and holes throughout the active region of the device by substantially offsetting carrier diffusion effects caused by differences in electron and hole mobility by using complementary differences in layer thickness and/or layer composition within the active region. Thus, the chirped design of the multi-well active region increases the probability of radiative recombination of electrons and holes within the light emitting active layers of the active region, which results in an increased light output of the device. The multi-well active region of the device may be chirped with respect to light emitting active layers and/or barrier layers of the active region.

6683815, Jan 27, 2004

Jun 26, 2002

10/180695

Eugene Y. Chen - Fremont CA
Kamel A. Ounadjela - Belmont CA
Ashish Pancholy - Milpitas CA

Silicon Magnetic Systems - San Jose CA

G11C 700

3652255, 365173, 365158

A circuit is provided herein, which is adapted to supply different current magnitudes along opposing directions of a conductive line. Such a circuit may be particularly beneficial in compensating for the effects of unintentional magnetic coupling within MRAM devices. In addition, a method is provided herein for configuring a device having a magnetic memory array, which receives a first current magnitude along one direction and a substantially different current magnitude along an opposite direction of the magnetic memory array. Furthermore, a method is provided herein which assigns tunable current magnitudes for write operations along conductive lines of a memory circuit. Such tunable writing currents advantageously increase the write selectivity of the memory circuit. More specifically, the tunable writing currents compensate for ferromagnetic and antiferromagnetic coupling within magnetic memory cells caused by uneven surface topology and non-zero total magnetic moments, respectively.

6750068, Jun 15, 2004

Aug 20, 2002

10/224253

Eugene Youjun Chen - Fremont CA

Freescale Semiconductor, Inc. - Austin TX

H01L 2100

438 3

An improved and novel magnetic element and fabrication method. The magnetic element ( ) including a bottom pinned ferromagnetic layer ( ) and a top pinned ferromagnetic layer ( ) fabricated antiparallel to one another. The magnetic element ( ) further including a bottom tunnel barrier layer ( ), a free ferromagnetic layer ( and ) and a top tunnel barrier layer ( ) formed between the bottom pinned ferromagnetic layer ( ) and the top pinned ferromagnetic layer ( ). The structure is defined as including two (2) tunnel barrier layers in which one tunnel barrier layer is normal ( ) and one is reversed ( ), or a structure in which the two tunnel barrier layers are of the same type ( ) with the structure further includes a SAF structure ( ) to allow for consistently changing magnetoresistance ratios across both tunnel barriers. The magnetic element ( ) having an improved magnetoresistance ratio and a decrease in voltage dependence.

6783491, Aug 31, 2004

Jun 13, 2002

10/173220

Vahid Saadat - Saratoga CA, 95070
Richard C. Ewers - Fullerton CA, 92833
Eugene G. Chen - Carlsbad CA, 92009

A61B 100

600114, 600139, 600127

Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.

6790173, Sep 14, 2004

Jun 13, 2002

10/173227

Vahid Saadat - Saratoga CA
Richard C. Ewers - Fullerton CA
Eugene G. Chen - Carlsbad CA

USGI Medical, Inc. - San Clemente CA

A61B 104

600114, 600115, 600121, 600129, 600141, 600144

Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.

6837847, Jan 4, 2005

Jun 13, 2002

10/173238

Richard C. Ewers - Fullerton CA, US
Vahid Saadat - Saratoga CA, US
Eugene G. Chen - Carlsbad CA, US

USGI Medical, Inc. - San Clemente CA

A61B 104

600114, 600121, 600127

Apparatus and methods are provided for placing and advancing a diagnostic or therapeutic instrument in a hollow body organ of a tortuous or unsupported anatomy, comprising a handle, an overtube, a distal region having an atraumatic tip. The overtube may be removable from the handle, and have a longitudinal axis disposed at an angle relative to the handle. The overtube may be selectively stiffened to reduce distension of the organ caused by advancement of the diagnostic or therapeutic instrument. The distal region permits passive steering of the overtube caused by deflection of the diagnostic or therapeutic instrument while the atraumatic tip prevents the wall of the organ from becoming caught or pinched during manipulation of the diagnostic or therapeutic instrument.

6904571, Jun 7, 2005

Sep 3, 2002

10/234411

Dominik J. Schmidt - San Jose CA, US
Perry Chun - Milpitas CA, US
Richard C. Saito - Sunnyvale CA, US
Eugene Y. Chen - San Jose CA, US

Altera Corporation - San Jose CA

G06F017/50

716 2, 716 8, 716 11, 716 14, 716 15

An method of creating a physical layout of an integrated circuit. A schematic file () is mapped directly to a physical layout using the location of elements and routing of interconnections as specified in the schematic file (). The method takes advantage of constraints on the schematic design to provide the layout file () quickly, without complex routing programs. Design rules violations are anticipated and corrected in some cases. In other cases, the design rule violations are annotated, if the designer intentionally placed them in the design.