Multilayer plate for x-ray imaging and method of producing same
AssigneeFTNI Inc.
InventorsBradley Trent Polischuk, Alain Jean
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Abstract
A multilayer plate for X-ray imaging is provided, which includes a substrate, a biasing electrode and a selenium-based membrane sandwiched between the substrate and the biasing electrode. The selenium-based membrane comprises a thick photoconductive layer of doped amorphous selenium and one or two thin buffer layers. One of the buffer layers is an amorphous arsenic triselenide layer positioned between the photoconductive layer and the substrate, and the other buffer layer is a unipolar conducting layer of alkali doped selenium positioned between the photoconductive layer and the biasing electrode. Preferably both layers are included. A method of producing such multilayer plates is also disclosed.
Claims26
A multilayer plate for X-ray imaging which comprises:
- (a) a substrate;
- (b) a biasing electrode;
- and
- (c) a selenium-based membrane sandwiched between said substrate and said biasing electrode, said membrane comprising a thick photoconductive layer of doped amorphous selenium and a thin buffer layer selected from:
- (i) an interstitial layer of amorphous arsenic triselenide, positioned between said photoconductive layer and said substrate;
- and
- (ii) a unipolar conducting layer of alkali doped selenium positioned between said photoconductive layer and said biasing electrode.
A multilayer plate for X-ray imaging which comprises:
- (a) a substrate;
- (b) a biasing electrode;
- and
- (c) a selenium-based membrane sandwiched between said substrate and said biasing electrode, said membrane comprising a thick photoconductive layer of doped amorphous selenium and two thin buffer layers consisting of:
- (i) an interstitial layer of amorphous arsenic triselenide, positioned between said photoconductive layer and said substrate;
- and
- (ii) a unipolar conducting layer of alkali doped selenium positioned between said photoconductive layer and said biasing electrode.
A multilayer plate for X-ray imaging which comprises:
- (a) a substrate;
- (b) a conducting biasing electrode;
- and
- (c) a selenium-based membrane sandwiched between said substrate and said biasing electrode, said membrane comprising a photoconductive layer of doped amorphous selenium having a thickness of between about 100 .mu.m and 2 mm, and a unipolar conducting buffer layer of alkali doped selenium having a thickness of between about 0.5 .mu.m and 10 .mu.m, said buffer layer being positioned between said photoconductive layer and said biasing electrode.
A multilayer plate for X-ray imaging which comprises:
- (a) a substrate;
- (b) a biasing electrode;
- and
- (c) a selenium-based membrane sandwiched between said substrate and said biasing electrode, said membrane comprising an interstitial buffer layer of amorphous arsenic triselenide having a thickness of between about 0.5 .mu.m and 10 .mu.m, a photoconductive layer of doped amorphous selenium having a thickness of between about 100 .mu.m and 2 mm, and a unipolar conducting buffer layer of alkali doped selenium having a thickness of between about 0.5 .mu.m and 10 .mu.m, said photoconductive layer being itself sandwiched between said buffer layers, with the interstitial buffer layer of amorphous arsenic triselenide being positioned between said photoconductive layer and the substrate, and the unipolar conducting layer of alkali doped selenium being positioned between said photoconductive layer and the biasing electrode.
Dependencies are inferred from the claim text.