The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2006
Filed:
Nov. 19, 2004
Peter M. Sandvik, Guilderland, NY (US);
Dale M. Brown, Schenectady, NY (US);
Stephen D. Arthur, Glenville, NY (US);
Kevin S. Matocha, Troy, NY (US);
James W. Kretchmer, Ballston Spa, NY (US);
Peter M. Sandvik, Guilderland, NY (US);
Dale M. Brown, Schenectady, NY (US);
Stephen D. Arthur, Glenville, NY (US);
Kevin S. Matocha, Troy, NY (US);
James W. Kretchmer, Ballston Spa, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
A detection system for detecting gamma rays including a scintillator crystal for receiving at least one gamma ray and generating at least one ultraviolet ray and an avalanche photodiode for detecting the ultraviolet ray. The avalanche photodiode includes: a substrate having a first dopant; a first layer having a second dopant, positioned on top of the substrate; a passivation layer for providing electrical passivation on a surface of the avalanche photodiode; a phosphorous silicate glass layer for limiting mobile ion transport, positioned above of the first layer; and a pair of metal electrodes for providing an ohmic contact wherein a first electrode is positioned below the substrate and a second electrode is positioned above the first layer. The avalanche photodiode comprises a first sidewall and a second sidewall forming a sloped mesa shape.