Duy T Nguyen

US Patent:

7848840, Dec 7, 2010

Filed:

Mar 20, 2008

Appl. No.:

12/052024

Inventors:

Ritchie Dao - San Jose CA, US
Derek Brodie - Sunnyvale CA, US
Scott Olszewski - Sunnyvale CA, US
Duy D Nguyen - Milpitas CA, US
Chunlei Zhang - Santa Clara CA, US

Assignee:

Applied Materials, Inc. - Santa Clara CA

International Classification:

G06F 19/00
G05B 13/00
G05B 11/42
G05D 23/00

US Classification:

700121, 700 37, 700 42, 700120, 700300, 21912158

Abstract:

Methods and systems for adaptively controlling process parameters in semiconductor manufacturing equipment. An embodiment provides for gain scheduling of PID controllers across recipe steps. One embodiment provides a method for controlling a chuck temperature during a semiconductor manufacturing process, the method employing a first set of proportional-integral-derivative (PID) values in a PID controller to control the chuck temperature at a first setpoint in a first step of a process recipe and employing a second set of PID values in the PID controller to control the chuck temperature at a second setpoint, different than the first setpoint, in a second step of the process recipe. The methods and systems provide reduced controller response times where process parameter setpoint between steps of a process recipe span a wide range.

US Patent:

8182467, May 22, 2012

Filed:

Sep 29, 2009

Appl. No.:

12/569786

Inventors:

Duy Nguyen - Corona CA, US
Sheldon Nelson - Plymouth MN, US
Elizabeth Nee - Minneapolis MN, US
Guy P. Vanney - Blaine MN, US

Assignee:

St. Jude Medical, Atrial Fibrillation Division, Inc. - St. Paul MN

International Classification:

A61B 5/04
A61B 18/18
A61M 25/00
A61M 31/00
A61M 37/00

US Classification:

604528, 600374, 600585, 604523, 604 9504, 606 41

Abstract:

The invention provides a deflectable catheter capable of forming many variable radius spiral forms from a single, flexible, distal end section. In one aspect, the catheter employs a variable radius control wire to extend or deform a pre-formed loop structure into a three dimensional spiral-like form or geometry. The ability of a single catheter to create a multitude of shapes and sizes allows users to access to a number of anatomical areas without changing the catheter during a procedure or treatment. In another aspect, the invention encompasses methods of producing deflectable variable radius catheters, where two or more regions of the catheter having common control wires are fused or formed onto one another.

US Patent:

8404598, Mar 26, 2013

Filed:

Aug 6, 2010

Appl. No.:

12/851606

Inventors:

Bryan Liao - Saratoga CA, US
Katsumasa Kawasaki - Los Gatos CA, US
Yashaswini Pattar - Palo Alto CA, US
Sergio Fukuda Shoji - San Jose CA, US
Duy D. Nguyen - Milpitas CA, US
Kartik Ramaswamy - San Jose CA, US
Ankur Agarwal - Mountain View CA, US
Phillip Stout - Santa Clara CA, US
Shahid Rauf - Pleasanton CA, US

Assignee:

Applied Materials, Inc. - Santa Clara CA

International Classification:

H01L 21/302

US Classification:

438714, 438706, 438710, 216 68

Abstract:

Methods for processing a substrate are provided herein. In some embodiments, a method of etching a dielectric layer includes generating a plasma by pulsing a first RF source signal having a first duty cycle; applying a second RF bias signal having a second duty cycle to the plasma; applying a third RF bias signal having a third duty cycle to the plasma, wherein the first, second, and third signals are synchronized; adjusting a phase variance between the first RF source signal and at least one of the second or third RF bias signals to control at least one of plasma ion density non-uniformity in the plasma or charge build-up on the dielectric layer; and etching the dielectric layer with the plasma.

US Patent:

20070270679, Nov 22, 2007

Filed:

Dec 29, 2006

Appl. No.:

11/647311

Inventors:

Duy Nguyen - Corona CA, US
Sheldon Nelson - Plymouth MN, US
Elizabeth Nee - Minneapolis MN, US
Guy Vanney - Blaine MN, US

International Classification:

A61M 25/00

US Classification:

600373000, 600585000, 604523000

Abstract:

The invention provides a deflectable catheter capable of forming many variable radius spiral forms from a single, flexible, distal end section. In one aspect, the catheter employs a variable radius control wire to extend or deform a pre-formed loop structure into a three dimensional spiral-like form or geometry. The ability of a single catheter to create the multitude of shapes and sizes possible allows users to access a greater number of anatomical areas without changing the catheter during a procedure or treatment. In another aspect, the invention encompasses methods of producing deflectable variable radius catheters, where two or more regions of the catheter having common control wires are fused or formed onto one another.

US Patent:

20080065205, Mar 13, 2008

Filed:

Sep 11, 2006

Appl. No.:

11/519519

Inventors:

Duy Nguyen - Corona CA, US
Kim Nguyen - Irvine CA, US

International Classification:

A61F 2/24

US Classification:

623 236

Abstract:

The invention is a device, and method for deploying same, configured for placement in a body lumen such as a coronary sinus, as may be desired to repair a mitral valve. The device includes a first anchor, a second anchor, and a bridge. The anchors are configured to delivered to a desired deployment site within the body lumen in a collapsed or contracted condition, and then be deployed by expanding the anchors into contact with the walls of the body lumen. One or more of the anchors may be configured to be radially collapsible after initial deployment in order to permit the anchor(s) to be repositioned in or removed from the body lumen. An anchor may be collapsible in response to a distal force applied to a portion of a proximal end thereof. A catheter for use with the implant is configured to deliver the implant to the site with the anchors in their respective collapsed configurations, and to release the anchors to permit them to expand into contact with the walls of the body lumen. The catheter is configured to apply a proximal force to one or both anchors, which may be applied via a cinch wire. The catheter may also be configured to apply a distal force against a portion of the proximal end of one or more of the anchors.

US Patent:

20080255447, Oct 16, 2008

Filed:

Apr 16, 2007

Appl. No.:

11/735722

Inventors:

Henry Bourang - Irvine CA, US
William R. Wertenberg - Newport Beach CA, US
Ronald J. Hosmer - Mission Viejo CA, US
Christopher Buller - Vancouver, CA
Duy Nguyen - Corona CA, US

International Classification:

A61M 25/01

US Classification:

600434

Abstract:

A diagnostic catheter having both a guidewire lumen and at least one contrast lumen is disclosed. In one embodiment, the contrast lumens allow the user to deliver contrast to a target area within the patient without removing the guidewire. Preferably, a plurality of contrast exit ports are included along the length of the catheter body to evenly and consistently distribute contrast into the blood stream, thereby providing improved visualization during radioscopy.

US Patent:

20100094392, Apr 15, 2010

Filed:

Oct 10, 2008

Appl. No.:

12/249867

Inventors:

Duy Nguyen - Corona CA, US
Kim Nguyen - Irvine CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/06
A61B 19/00

US Classification:

623 111, 128898

Abstract:

Embodiments of an expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a tissue heart valve, into a patient. Such embodiments can minimize trauma to the vessel by allowing for temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus, followed by a return to the original diameter once the prosthetic device passes through. Some embodiments can comprise a sheath with inner and outer tubular layers, and an intermediate tubular layer comprising a shape memory alloy. Other embodiments comprise one or more layers having one or more longitudinal notches or cuts to facilitate expansion of the sheath. Embodiments of the present expandable sheath can avoid the need for multiple insertions for the dilation of the vessel, thus offering advantages over prior art introducer sheaths.

US Patent:

20110186545, Aug 4, 2011

Filed:

Oct 15, 2010

Appl. No.:

12/905624

Inventors:

Walter R. MERRY - Sunnyvale CA, US
Sergio Fukuda SHOJI - San Jose CA, US
Chunlei ZHANG - Santa Clara CA, US
Yashaswini B. PATTAR - Palo Alto CA, US
Duy D. NGUYEN - Milpitas CA, US
Tina TSONG - San Jose CA, US
Shane C. NEVIL - Livermore CA, US
Fernando M. SILVEIRA - Livermore CA, US
Brad L. MAYS - San Jose CA, US
Kartik RAMASWAMY - San Jose CA, US
Hamid NOORBAKHSH - Fremont CA, US

Assignee:

APPLIED MATERIALS, INC. - Santa Clara CA

International Classification:

C23F 1/08
C23F 1/00
C23C 16/50
C23C 16/458
C23C 16/52
G05D 23/00

US Classification:

216 59, 427569, 15634527, 118666, 700211

Abstract:

Methods and systems for controlling temperatures in plasma processing chamber with reduced controller response times and increased stability. Temperature control is based at least in part on a feedforward control signal derived from a plasma power input into the processing chamber. A feedforward control signal compensating disturbances in the temperature attributable to the plasma power may be combined with a feedback control signal counteracting error between a measured and desired temperature.