Kenneth L Wu

US Patent:

6689211, Feb 10, 2004

Filed:

Jun 22, 2000

Appl. No.:

09/599260

Inventors:

Kenneth C. Wu - San Francisco CA
Eugene A. Fitzgerald - Windham NH
Jeffrey T. Borenstein - Hollison MA
Gianna Taraschi - Andover MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

C30B 2522

US Classification:

117 94, 117 95, 117 97, 117915, 117939

Abstract:

A SiGe monocrystalline etch-stop material system on a monocrystalline silicon substrate. The etch-stop material system can vary in exact composition, but is a doped or undoped Si Ge alloy with x generally between 0. 2 and 0. 5. Across its thickness, the etch-stop material itself is uniform in composition. The etch stop is used for micromachining by aqueous anisotropic etchants of silicon such as potassium hydroxide, sodium hydroxide, lithium hydroxide, ethylenediamine/pyrocatechol/pyrazine (EDP), TMAH, and hydrazine. These solutions generally etch any silicon containing less than 7Ã10 cm of boron or undoped Si Ge alloys with x less than approximately 18. Alloying silicon with moderate concentrations of germanium leads to excellent etch selectivities, i. e. , differences in etch rate versus pure undoped silicon. This is attributed to the change in energy band structure by the addition of germanium.

US Patent:

7227176, Jun 5, 2007

Filed:

Jun 25, 2003

Appl. No.:

10/603852

Inventors:

Kenneth C. Wu - San Francisco CA, US
Eugene A. Fitzgerald - Windham NH, US
Gianni Taraschi - Andover MA, US
Jeffrey T. Borenstein - Holliston MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA
The Charles Stark Draper Laboratory, Inc. - Cambridge MA

International Classification:

H01L 29/06

US Classification:

257 18, 257190, 438285, 438590

Abstract:

A semiconductor structure including a uniform etch-stop layer. The uniform etch stop layer has a relative etch rate which is less than approximately the relative etch rate of Si doped with 7×10boron atoms/cm. A method for forming a semiconductor structure includes forming a uniform etch-stop layer providing a handle wafer, and bonding the uniform etch-stop layer to the handle wafer. The uniform etch-stop layer has a relative etch rate which is less than approximately the relative etch rate of Si doped with 7×10boron atoms/cm.

US Patent:

8246590, Aug 21, 2012

Filed:

Oct 10, 2008

Appl. No.:

12/249759

Inventors:

Dean Hu - Hayward CA, US
Moshe Pinto - Mountain View CA, US
Kenton Fong - Mountain View CA, US
Akshay Mavani - Los Altos CA, US
Kenneth Wu - San Francisco CA, US

Assignee:

Spiracur, Inc. - Redwood City CA

International Classification:

A61F 13/00

US Classification:

604305, 604187, 604192, 604268, 604289, 604290, 604296, 604300, 604304, 604311, 604312, 604313, 604315, 604316, 604318, 604 35, 604 36, 604119

Abstract:

A surgical tissue therapy device includes a sealant layer and a collection chamber. The sealant layer functions so as to create a sealed enclosure or space between it and the surface of a patient by forming, preferably, an airtight seal around a surgical area of skin trauma. The closed incision tissue therapy device also comprises a collection chamber, which may comprise an elongate tubular chamber with a plurality of longitudinally spaced openings. The collection chamber may be configured to be in fluid communication with the sealant layer and the area of skin trauma and functions as to distribute the negative pressure applied to a surgically closed area of skin trauma. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of air molecules under the sealant layer. The collection material may comprise a material and/or a configuration that permits length changes based upon the length of the corresponding surgical wound or incision.

US Patent:

8361043, Jan 29, 2013

Filed:

Jan 7, 2010

Appl. No.:

12/683987

Inventors:

Dean Hu - San Leandro CA, US
Kenton Fong - Mountain View CA, US
Moshe Pinto - Mountain View CA, US
Kenneth Wu - San Francisco CA, US
Evan Anderson - Sunnyvale CA, US
Anthony Coxum - San Jose CA, US
Brendan Donohoe - Fairfax CA, US
Philip Hui - Foster City CA, US
Craig McGreevy - Walnut Creek CA, US

Assignee:

Spiracur Inc. - Sunnyvale CA

International Classification:

A61M 1/00

US Classification:

604319

Abstract:

Reduced pressure wound therapy is performed on a sacral region of a patient using an adhesive dressing comprising a flexible planar layer and a non-planar fold-sealing region configured to seal to the intergluteal cleft of a patient. The fold-sealing region is located on an outer edge of the adhesive dressing and comprises a tapered configuration.

US Patent:

8366693, Feb 5, 2013

Filed:

Jun 18, 2010

Appl. No.:

12/818459

Inventors:

Dean Hu - San Leandro CA, US
Kenton Fong - Mountain View CA, US
Moshe Pinto - Mountain View CA, US
Kenneth Wu - Mountain View CA, US
Craig McGreevy - Walnut Creek CA, US
Brendan Donohoe - Fairfax CA, US

Assignee:

Spiracur, Inc. - Sunnyvale CA

International Classification:

A61M 1/00

US Classification:

604319, 604187, 604192, 604268, 604290, 604296, 604300, 604304, 604305, 604311, 604312, 604313, 604315, 604316, 604318, 604 35, 604119

Abstract:

A surgical tissue therapy device includes a sealant layer and a collection chamber. The sealant layer functions so as to create a sealed enclosure, or space between it and the surface of a patient, by forming an airtight seal around a surgical area of skin trauma. The closed incision tissue therapy device also comprises a collection chamber, which may comprise an elongate tubular chamber with a plurality of longitudinally spaced openings. The collection chamber may be configured to be in fluid communication with the sealant layer and the area of skin trauma and functions as to distribute the negative pressure applied to a surgically closed area of skin trauma. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of air molecules under the sealant layer. The collection material may comprise a material and/or a configuration that permits length changes based upon the length of the corresponding surgical wound or incision.

US Patent:

8398604, Mar 19, 2013

Filed:

Sep 26, 2011

Appl. No.:

13/245731

Inventors:

Kenneth Wu - San Francisco CA, US
Dean Hu - San Leandro CA, US
Sumona Nag - Los Angeles CA, US

Assignee:

Spiracur, Inc. - Sunnyvale CA

International Classification:

A61M 1/00

US Classification:

604319, 604187, 604192, 604268, 604289, 604290, 604296, 604300, 604304, 604305, 604311, 604312, 604313, 604315, 604316, 604318, 604 35, 604 36, 604119

Abstract:

Disclosed are devices, systems and methods for treating an incision. The device includes a generally planar tension relief module, comprising a central structure in fluid communication with the incision, wherein at least a portion of the central structure is adapted to be aligned with a longitudinal axis of the incision; and opposing adhesive structures coupled to the central structure and a flexible sealant structure comprising a lower adhesive surface and sized to seal over the tension relief module forming a sealed flow pathway. The opposing adhesive structures are adapted to be stretched from a relaxed configuration to a first tensile configuration and to return towards the relaxed configuration from the first tensile configuration into a second tensile configuration and impart a contracting force in a direction that is towards the opposing adhesive structure.

US Patent:

8409159, Apr 2, 2013

Filed:

Apr 9, 2010

Appl. No.:

12/757654

Inventors:

Dean Hu - San Leandro CA, US
Kenton Fong - Mountain View CA, US
Moshe Pinto - Mountain View CA, US
Kenneth Wu - San Francisco CA, US
Craig McGreevy - Walnut Creek CA, US
Brendan Donohoe - Fairfax CA, US

Assignee:

Spiracur, Inc. - Sunnyvale CA

International Classification:

A61M 1/00

US Classification:

604319, 604187, 604192, 604268, 604289, 604290, 604296, 604300, 604304, 604305, 604311, 604312, 604313, 604315, 604316, 604318, 604119, 604 35, 604 36

Abstract:

A surgical tissue therapy device includes a sealant layer and a collection chamber. The sealant layer functions so as to create a sealed enclosure, or space between it and the surface of a patient, by forming an airtight seal around a surgical area of skin trauma. The closed incision tissue therapy device also comprises a collection chamber, which may comprise an elongate tubular chamber with a plurality of longitudinally spaced openings. The collection chamber may be configured to be in fluid communication with the sealant layer and the area of skin trauma and functions as to distribute the negative pressure applied to a surgically closed area of skin trauma. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of air molecules under the sealant layer. The collection material may comprise a material and/or a configuration that permits length changes based upon the length of the corresponding surgical wound or incision.

US Patent:

8435221, May 7, 2013

Filed:

Jun 18, 2010

Appl. No.:

12/818414

Inventors:

Dean Hu - Hayward CA, US
Moshe Pinto - Mountain View CA, US
Kenton Fong - Mountain View CA, US
Akshay Mavani - Los Altos CA, US
Kenneth Wu - San Francisco CA, US

Assignee:

Spiracur, Inc. - Sunnyvale CA

International Classification:

A61F 13/00

US Classification:

604305, 604187, 604192, 604268, 604289, 604290, 604296, 604300, 604304, 604311, 604312, 604313, 604315, 604316, 604318, 604119, 604 35, 604 36

Abstract:

A surgical tissue therapy device includes a sealant layer and a collection chamber. The sealant layer functions so as to create a sealed enclosure or space between it and the surface of a patient by forming, preferably, an airtight seal around a surgical area of skin trauma. The closed incision tissue therapy device also comprises a collection chamber, which may comprise an elongate tubular chamber with a plurality of longitudinally spaced openings. The collection chamber may be configured to be in fluid communication with the sealant layer and the area of skin trauma and functions as to distribute the negative pressure applied to a surgically closed area of skin trauma. Preferably, the pressure under the sealant layer is reduced by expanding the volume of the enclosure space and thereby decreasing the density of air molecules under the sealant layer. The collection material may comprise a material and/or a configuration that permits length changes based upon the length of the corresponding surgical wound or incision.