Ka On Wong

US Patent:

6764952, Jul 20, 2004

Filed:

Mar 13, 2002

Appl. No.:

10/099232

Inventors:

Jengyi Yu - San Jose CA
Ka Shun Wong - San Jose CA
Sanjeev Jain - Santa Clara CA
Somnath Nag - Saratoga CA
Haiying Fu - West Linn OR
Atul Gupta - Mountain View CA
Bart J. Van Schravendijk - Sunnyvale CA

Assignee:

Novellus Systems, Inc. - San Jose CA

International Classification:

H01L 2144

US Classification:

438687, 438778, 438791, 438958

Abstract:

Two sequential treatments within a chemical vapor deposition chamber, or within sequential chambers without a vacuum break, are performed on a copper layer to clean and passivate the copper surface prior to deposition of a copper diffusion barrier layer or a dielectric layer. The first treatment includes an ammonia, a hydrogen, or a hydrocarbon plasma cleaning of the copper surface followed by a short initiation of an organosilane precursor or a thin silicon nitride layer. A copper diffusion barrier layer may then be formed over the pretreated copper surface using an organosilane plasma, with or without a carbon dioxide or a carbon monoxide, or a silane with a nitrogen gas and an ammonia gas. Copper diffusion is retarded and film adhesion is improved for a dielectric layer or a copper diffusion barrier layer on the copper surface.

US Patent:

20210045626, Feb 18, 2021

Filed:

Aug 14, 2020

Appl. No.:

16/994245

Inventors:

- Redwood City CA, US
Ka Chun Wong - South San Francisco CA, US

International Classification:

A61B 1/307
A61B 1/005
A61B 1/05
A61B 1/00
A61B 34/30

Abstract:

Certain aspects relate to systems and techniques for an endoscopic system to access, visualize, and treat pathologies in various organs via natural orifices and lumens of various organs. In one aspect, the system includes an elongate shaft configured for insertion into a urinary tract of a patient. The elongate shaft can include a proximal section, a distal section, a tip portion, and a plurality of pull wires extending along the elongate shaft and terminating at the tip portion of the elongate shaft. The plurality of pull wires may include a first and second pull wire. The first pull wire may be configured to articulate each of the proximal section and the distal section in a first direction. The second pull wire may be configured to articulate the distal section in a second direction independently of the proximal section, the second direction being transverse to the first direction.

US Patent:

20200206472, Jul 2, 2020

Filed:

Dec 27, 2019

Appl. No.:

16/728948

Inventors:

- Redwood City CA, US
Binh T. Nguyen - Newark CA, US
Ka Chun Wong - South San Francisco CA, US
Ryan Jeffrey Connolly - San Carlos CA, US
Javier O. Fajardo Vargas - Daly City CA, US
Umberto Scarfogliero - Redwood City CA, US
Zachary Stahl Morrison - Dallas TX, US

International Classification:

A61M 25/06
A61M 3/02
A61M 1/00
A61B 17/22
A61B 1/00
A61B 1/307
A61M 29/02
A61B 5/20
A61B 10/04
A61B 50/13
A61B 34/37
A61G 13/04
A61B 34/20

Abstract:

Certain aspects relate to percutaneous sheaths for medical procedures as well as to related systems and methods. For example, a system for performing a percutaneous assisted medical procedure can include a percutaneous sheath. The percutaneous sheath can include a first conduit for providing aspiration into the kidney and a second conduit for passing a catheter into the kidney. The system can also include an aspiration catheter configured to be inserted into the kidney through the second conduit of the percutaneous sheath. A fluidics system can include an irrigation source comprising a pump and an aspiration source comprising a vacuum. The irrigation source can be connected to a fluid inlet of the percutaneous sheath that is connected to the first conduit. The aspiration source can be connected to the aspiration catheter.

US Patent:

20190175799, Jun 13, 2019

Filed:

Dec 6, 2018

Appl. No.:

16/212199

Inventors:

- Redwood City CA, US
Ka Chun Wong - South San Francisco CA, US
Rachel Leigh Chok - Sunnyvale CA, US
Joshua F. DeFonzo - San Carlos CA, US
Binh T. Nguyen - Newark CA, US
Vivian Thalia Nguyen - Palo Alto CA, US
Rishi Nikhil Purohit - Fremont CA, US

International Classification:

A61M 1/00
A61M 3/02
A61B 17/22
A61B 18/26
A61B 50/13
A61B 1/307
A61B 1/267
A61B 10/02

Abstract:

Methods and systems for administering directed fluidics during a medical procedure for removing an object are disclosed. A method includes inserting first and second medical instruments into a treatment site, providing irrigation and aspiration of the treatment site through the first and second medical instruments, determining a characteristic of one of the irrigation and the aspiration, and selecting a characteristic of the other of the irrigation and aspiration based on the determined characteristic.