Jun Liu

US Patent:

8440494, May 14, 2013

Filed:

May 20, 2011

Appl. No.:

13/112465

Inventors:

Kathryn C. Fisher - Brooklyn NY, US
Jun Liu - Irvington NY, US
Satyavolu S. Papa Rao - Poughkeepsie NY, US
George G. Totir - Newtown CT, US
James Vichiconti - Peekskill NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H01L 21/00

US Classification:

438 71, 438745, 257E21214

Abstract:

Alternative additives that can be used in place of isopropyl alcohol in aqueous alkaline etchant solutions for texturing a surface of a single-crystalline silicon substrate are provided. The alternative additives do not have volatile constituents, yet can be used in an aqueous alkaline etchant solution to provide a pyramidal shaped texture surface to the single-crystalline silicon substrate that is exposed to such an etchant solution. Also provided is a method of forming a textured silicon surface. The method includes immersing a single-crystalline silicon substrate into an etchant solution to form a pyramid shaped textured surface on the single-crystalline silicon substrate. The etchant solution includes an alkaline component, silicon (etched into the solution as a bath conditioner) and glycerol or ethylene glycol as an additive. The textured surface of the single-crystalline silicon substrate has (111) faces that are now exposed.

US Patent:

20130025663, Jan 31, 2013

Filed:

Jul 27, 2011

Appl. No.:

13/192088

Inventors:

Jun Liu - Irvington NY, US
Qiang Huang - Croton on Hudson NY, US
Young-hee Kim - Mohegan Lake NY, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

H01L 31/0236
H01L 31/18

US Classification:

136256, 438 71, 257E3113

Abstract:

A method for texturing a single-crystalline silicon substrate is provided in which inverted pyramids are formed within the textured single-crystalline silicon substrate. The textured single-crystalline silicon substrates containing the inverted pyramids provided by the present disclosure have a low reflectance associated therewith and thus can be used as a component of a silicon solar cell. The method includes forming a plurality of openings that extend beneath an upper surface of a single-crystalline silicon substrate, and forming inverted pyramids in each of the openings by expanding each opening.

US Patent:

20130045562, Feb 21, 2013

Filed:

Aug 18, 2011

Appl. No.:

13/212740

Inventors:

Jun Liu - Irvington NY, US
Qiang Huang - Croton on Hudson NY, US
Young-Hee Kim - Mohegan Lake NY, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

H01L 31/18

US Classification:

438 72, 257E3112

Abstract:

A method of forming a photovoltaic device containing a buried emitter region and vertical metal contacts is provided. The method includes forming a plurality of metal nanoparticles on exposed portions of a single-crystalline silicon substrate that are not covered by patterned antireflective coatings (ARCs). A metal nanoparticle catalyzed etching process is then used to form trenches within the single-crystalline silicon substrate and thereafter the metal nanoparticles are removed from the trenches. An emitter region is then formed within exposed portions of the single-crystalline silicon substrate, and thereafter a metal contact is formed atop the emitter region.

US Patent:

20140037228, Feb 6, 2014

Filed:

Jul 25, 2013

Appl. No.:

13/950535

Inventors:

Alban Lefebvre - Jersey City NJ, US
Axel Loewe - Monmouth Junction NJ, US
Mariappan S. Nadar - Plainsboro NJ, US
Jun Liu - Plainsboro NJ, US

Assignee:

SIEMENS CORPORATION - Iselin NJ

International Classification:

G06T 1/20

US Classification:

382304

Abstract:

A computer-implemented method for calculating a multi-dimensional wavelet transform in an image processing system comprising a plurality of computation units includes receiving multi-dimensional image data. An overlap value corresponding to a number of non-zero filter coefficients associated with the multi-dimensional wavelet transform is identified. Then the multi-dimensional image data is divided into a plurality of multi-dimensional arrays, wherein the multi-dimensional arrays overlap in each dimension by a number of pixels equal to the overlap value. A multi-dimensional wavelet transform is calculated for each multi-dimensional array, in parallel, across the plurality of computation units.

US Patent:

20140042360, Feb 13, 2014

Filed:

Oct 22, 2013

Appl. No.:

14/060107

Inventors:

Jun Liu - Irvington NY, US
Satyavolu S. Papa Rao - Poughkeepsie NY, US
George G. Totir - Newtown CT, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

C09K 13/02

US Classification:

252 795

Abstract:

A method of texturing a surface of a crystalline silicon substrate is provided. The method includes immersing a crystalline silicon substrate into an aqueous alkaline etchant solution to form a pyramid shaped textured surface, with (111) faces exposed, on the crystalline silicon substrate. The aqueous alkaline etchant solution employed in the method of the present disclosure includes an alkaline component and a nanoparticle slurry component. Specifically, the aqueous alkaline etchant solution of the present disclosure includes 0.5 weight percent to 5 weight percent of an alkaline component and from 0.1 weight percent to 5 weight percent of a nanoparticle slurry on a dry basis.

US Patent:

20140051201, Feb 20, 2014

Filed:

Oct 22, 2013

Appl. No.:

14/060087

Inventors:

Jun Liu - Irvington NY, US
Satyavolu S. Papa Rao - Poughkeepsie NY, US
George G. Totir - Newtown CT, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

H01L 31/0384

US Classification:

438 63

Abstract:

A method of texturing a surface of a crystalline silicon substrate is provided. The method includes immersing a crystalline silicon substrate into an aqueous alkaline etchant solution to form a pyramid shaped textured surface, with (111) faces exposed, on the crystalline silicon substrate. The aqueous alkaline etchant solution employed in the method of the present disclosure includes an alkaline component and a nanoparticle slurry component. Specifically, the aqueous alkaline etchant solution of the present disclosure includes 0.5 weight percent to 5 weight percent of an alkaline component and from 0.1 weight percent to 5 weight percent of a nanoparticle slurry on a dry basis.

US Patent:

55857922, Dec 17, 1996

Filed:

Oct 24, 1994

Appl. No.:

8/328077

Inventors:

Jun Liu - Weehawken NJ
Ioannis Milios - New York NY

Assignee:

USAR Systems Inc. - New York NY

International Classification:

H03K 1794

US Classification:

341 22

Abstract:

An improved energy-saving keyboard with low parts count accomplishes a sophisticated regime of low-power mode intervals in response to key closures and communications from the computer to which the keyboard is connected. An interrupt pin of the keyboard controller (encoder) prompts the transition from low-power mode to normal mode. The communications from the computer is synchronous communications mediated by a clock line, and the interrupt pin is tied not to the clock line but to the data line of the synchronous channel. The interrupt pin is also tied to a resistor array providing pullup biases to the keyboard matrix; in normal-power mode a discrete output of the encoder forces the common point of the resistor array to a fixed voltage level. In low-power mode, on the other hand, the discrete output is not asserted, and the resistor array is pulled high by a pullup impedance of relatively high resistance to the fixed voltage level. In this way, any key closure at the keyboard triggers the interrupt.

US Patent:

60401494, Mar 21, 2000

Filed:

Jan 10, 1997

Appl. No.:

8/785247

Inventors:

Richard N. Kolesnick - New York NY
Jun Liu - Boston MA
Yuhua Zhang - New York NY

Assignee:

Sloan-Kettering Institute for Cancer Research - New York NY

International Classification:

C12Q 148
C12N 912
A61K 3851

US Classification:

435 15

Abstract:

The subject invention provides a purified membrane-bound ceramide-activated protein kinase having an apparent molecular weight of about 110 kD as determined by SDS polyacrylamide gel electrophoresis, which protein kinase is capable of specifically phosphorylating the threonine residue in a Thr-Pro- or a Thr-Leu-Pro-containing polypeptide. The subject invention also provides a method of determining whether an agent is capable of specifically inhibiting the phosphorylation activity of the ceramide-activated protein kinase. The subject invention further provides a method of determining whether an agent is capable of specifically stimulating the phosphorylation activity of the ceramide-activated protein kinase. The subject invention further provides a method of treating a subject having an inflammatory disorder. The subject invention further provides a method of treating a human subject infected with HIV so as to reduce the proliferation of HIV in the human subject.