ROBERT HOWARD DAVIS
Pharmacy in Pittsburgh, PA

7723154, May 25, 2010

Oct 19, 2006

11/551058

Bunmi T. Adekore - Medford MA, US
Jonathan M. Pierce - Raleigh NC, US
Robert F. Davis - Pittsburgh PA, US
George B. Kenney - Medfield MA, US

North Carolina State University - Raliegh NC
LumenZ, LLC - Boston MA

H01L 21/00

438104

A p-type ZnO-based II-VI compound semiconductor layer has silver, potassium and/or gold dopants therein at a net p-type dopant concentration of greater than about 1×10cm. A method of forming the layer includes using an atomic layer deposition (ALD) technique. This technique includes exposing a substrate to a combination of gases: a first reaction gas containing zinc at a concentration that is repeatedly transitioned between at least two concentration levels during a processing time interval, a second reaction gas containing oxygen and a p-type dopant gas containing at least one p-type dopant species selected from a group consisting of silver, potassium and gold. A concentration of oxygen in the second reaction gas may also be repeatedly transitioned between at least two concentration levels. The concentration of zinc in the first reaction gas and the concentration of oxygen in the second reaction gas may be transitioned in an alternating sequence, so that relatively high zinc concentrations in the first reaction gas overlap with relatively low oxygen concentrations in the second reaction gas and vice versa.

7829376, Nov 9, 2010

Apr 7, 2010

12/755499

Bunmi T. Adekore - Medford MA, US
Jonathan M. Pierce - Raleigh NC, US
Robert F. Davis - Pittsburgh PA, US

LumenZ, Inc. - Boston MA

H01L 21/00

438104

A p-type ZnO-based II-VI compound semiconductor layer has silver, potassium and/or gold dopants therein at a net p-type dopant concentration of greater than about 1×10cm. A method of forming the layer includes using an atomic layer deposition (ALD) technique. This technique includes exposing a substrate to a combination of gases: a first reaction gas containing zinc at a concentration that is repeatedly transitioned between at least two concentration levels during a processing time interval, a second reaction gas containing oxygen and a p-type dopant gas containing at least one p-type dopant species selected from a group consisting of silver, potassium and gold. A concentration of oxygen in the second reaction gas may also be repeatedly transitioned between at least two concentration levels. The concentration of zinc in the first reaction gas and the concentration of oxygen in the second reaction gas may be transitioned in an alternating sequence, so that relatively high zinc concentrations in the first reaction gas overlap with relatively low oxygen concentrations in the second reaction gas and vice versa.

2009009, Apr 16, 2009

Oct 9, 2008

12/248359

Fernando A. Ferraro - Apollo PA, US
Robert K. Davis - Pittsburgh PA, US
Joseph Grosholz, JR. - Natrona Heights PA, US

EV PRODUCTS, INC. - Saxonburg PA

G01T 1/24

25037013

A radiation detection system includes a radiation detector and a DC/DC converter that induces an electric field in the radiation detector. A counter circuit outputs a pulse related to the energy of each incoming radiation event on the radiation detector. The peak amplitude of each pulse output by the counter circuit is converted into a digital equivalent value. A means for processing processes each digital equivalent value and counts a number of pulses output by the counter circuit over an interval of time. A port has one or more data lines connected to the means for processing and one or more power lines connected to the DC/DC converter. The port facilitates a connection to a host system which provides a single DC voltage to the DC/DC converter which converts the single DC voltage into a higher level voltage that induces the electric field in the radiation detector.

6927396, Aug 9, 2005

Oct 24, 2001

10/399810

Viatcheslav Vydrin - Pittsburgh PA, US
Robert K. Davis - Pittsburgh PA, US
Joseph Grosholz, Jr. - Natrona Heights PA, US
Kevin B. Parnham - Acton CA, US

II-VI Incorporated - Saxonburg PA

G01T001/00

250367, 250366

A gamma ray camera A includes a crystal array S which includes a plurality of pixels each of which outputs a pixel signal in response to receiving a gamma ray. A first circuit (and ) outputs for each pixel of the crystal array S, when a pixel signal output by the pixel has a predetermined relation to a reference signal, a threshold signal related to the position of the pixel in the crystal array S. A second circuit (and ) outputs a counter value for each pixel signal having a predetermined relation to its threshold signal. Lastly, a third circuit accumulates for each pixel of the crystal array S a count of the counter values output by the second circuit (and ) for the pixel.

2008013, Jun 12, 2008

Mar 7, 2006

11/815343

Viatcheslav Vydrin - Pittsburgh PA, US
Robert K. Davis - Pittsburgh PA, US
David S. Rundle - Butler PA, US

II-VI INCORPORATED - Saxonburg PA

G01T 1/24

25037009

A radiation detection system is operative for converting () a radiation event into an electrical signal having an amplitude related to the energy of said radiation event, converting () at least a portion of the electrical signal into a count value related to the amplitude of the electrical signal and determining () the energy of the radiation event from the count value.