Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals

Wright, Gomez W; James, Ralph B; Burger, Arnold; Chinn, Douglas A

Title: Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals

Full Record
Other Related Research

Abstract

A method for treatment of the surface of a CdZnTe (CZT) crystal that provides a native dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals. A two step process is disclosed, etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, passivating the CZT crystal surface with a solution of 10 w/o NH4F and 10 w/o H2O2 in water.

Inventors:

Wright, Gomez W ^[1]; James, Ralph B ^[2]; Burger, Arnold ^[1]; Chinn, Douglas A ^[2]

Nashville, TN
Livermore, CA

Issue Date:: 2006-02-21

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

OSTI Identifier:: 879901

Patent Number(s):: 7001849

Application Number:: 10/326430

Assignee:: Sandia National Laboratories (Livermore, CA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES

Show more

G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
G01T1/2002 - {Optical details, e.g. reflecting or diffusing layers}

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
H01L31/1032 - {the devices comprising active layers formed only by AIIBVI compounds, e.g. HgCdTe IR photodiodes}
H01L31/1832 - {comprising ternary compounds, e.g. Hg Cd Te}
H01L31/02966 - {including ternary compounds, e.g. HgCdTe}

Show less

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Citation Formats


                    Wright, Gomez W, James, Ralph B, Burger, Arnold, and Chinn, Douglas A. Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals.  United States: N. p., 2006. 
        Web.

Copy to clipboard


                    Wright, Gomez W, James, Ralph B, Burger, Arnold, & Chinn, Douglas A. Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals.  United States.

Copy to clipboard


                    Wright, Gomez W, James, Ralph B, Burger, Arnold, and Chinn, Douglas A. Tue .  
        "Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals".  United States.  https://www.osti.gov/servlets/purl/879901.

Copy to clipboard


                    
@article{osti_879901,

  title        = {Surface Treatment And Protection Method For Cadium Zinc Telluride Crystals},

  author       = {Wright, Gomez W and James, Ralph B and Burger, Arnold and Chinn, Douglas A},

  abstractNote = {A method for treatment of the surface of a CdZnTe (CZT) crystal that provides a native dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals. A two step process is disclosed, etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, passivating the CZT crystal surface with a solution of 10 w/o NH4F and 10 w/o H2O2 in water.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2006},

  month        = {2}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Surface treatment and protection method for cadmium zinc telluride crystals

Patent Wright, Gomez W [Nashville, TN]; James, Ralph B [Livermore, CA]; Burger, Arnold [Nashville, TN]; ...

A method for treatment of the surface of a CdZnTe (CZT) crystal that provides a native dielectric coating to reduce surface leakage currents and thereby, improve the resolution of instruments incorporating detectors using CZT crystals. A two step process is disclosed, etching the surface of a CZT crystal with a solution of the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, passivating the CZT crystal surface with a solution of 10 w/o NH.sub.4 F and 10 w/o H.sub.2 O.sub.2 in water.
Full Text Available
Method for surface passivation and protection of cadmium zinc telluride crystals

Patent Mescher, Mark J [5640 Hobart St., Apt. #9, Pittsburg, PA 15217]; James, Ralph B [5420 Lenore Ave., Livermore, CA 94550]; Schlesinger, Tuviah E [8 Carleton Dr., Mount Lebanon, PA 15243]; ...

A method for reducing the leakage current in CZT crystals, particularly Cd.sub.1-x Zn.sub.x Te crystals (where x is greater than equal to zero and less than or equal to 0.5), and preferably Cd.sub.0.9 Zn.sub.0.1 Te crystals, thereby enhancing the ability of these crystal to spectrally resolve radiological emissions from a wide variety of radionuclides. Two processes are disclosed. The first method provides for depositing, via reactive sputtering, a silicon nitride hard-coat overlayer which provides significant reduction in surface leakage currents. The second method enhances the passivation by oxidizing the CZT surface with an oxygen plasma prior to silicon nitride depositionmore » without breaking the vacuum state. « less
Full Text Available
Method for surface treatment of a cadmium zinc telluride crystal

Patent James, Ralph [5420 Lenore Ave., Livermore, CA 94550]; Burger, Arnold [753 Adkisson La., Nashville, TN 37205]; Chen, Kuo-Tong [7800 River Fork Dr., Nashville, TN 37221]; ...

A method for treatment of the surface of a CdZnTe (CZT) crystal that reduces surface roughness (increases surface planarity) and provides an oxide coating to reduce surface leakage currents and thereby, improve resolution. A two step process is disclosed, etching the surface of a CZT crystal with a solution of lactic acid and bromine in ethylene glycol, following the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, oxidizing the CZT crystal surface.
Full Text Available
Method for surface passivation and protection of cadmium zinc telluride crystals

Patent

A method for reducing the leakage current in CZT crystals, particularly Cd{sub 1{minus}x}Zn{sub x}Te crystals (where x is greater than equal to zero and less than or equal to 0.5), and preferably Cd{sub 0.9}Zn{sub 0.1}Te crystals, thereby enhancing the ability of these crystal to spectrally resolve radiological emissions from a wide variety of radionuclides. Two processes are disclosed. The first method provides for depositing, via reactive sputtering, a silicon nitride hard-coat overlayer which provides significant reduction in surface leakage currents. The second method enhances the passivation by oxidizing the CZT surface with an oxygen plasma prior to silicon nitride depositionmore » without breaking the vacuum state. « less
Method for surface treatment of a cadmium zinc telluride crystal

Patent James, R; Burger, A; Chen, K T; ...

A method for treatment of the surface of a CdZnTe (CZT) crystal is disclosed that reduces surface roughness (increases surface planarity) and provides an oxide coating to reduce surface leakage currents and thereby, improve resolution. A two step process is disclosed, etching the surface of a CZT crystal with a solution of lactic acid and bromine in ethylene glycol, following the conventional bromine/methanol etch treatment, and after attachment of electrical contacts, oxidizing the CZT crystal surface. 3 figs.

Similar Records