Browse Prior Art Database

3-LAYER SE/AS ALLOY MEDICAL IMAGING MEMBER

IP.com Disclosure Number: IPCOM000026771D
Original Publication Date: 1993-Aug-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 103K

Publishing Venue

Xerox Disclosure Journal

Abstract

A medical imaging member having a three layer structure which inhibits the formation of crystallites and reduces the occurrence of powder deficient spot print artifacts is disclosed. A conventional 0.3% Arsenic-Selenium (As-Se) alloy is an X-ray sensitive material that may be vacuum evaporated and deposited on an aluminum substrate to form an imaging member. In the evaporation process, this alloy is known to fractionate producing selenium rich species early on and arsenic rich species near the end of the evaporation process.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 59% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

3-LAYER SE/AS ALLOY MEDICAL IMAGING MEMBER
Philip G. Perry
Kenneth J. Pheilshifter
Algird G. Leiga
William D. Fender
Eddie M. Zanrosso
Dinah J. Hanna
Gerhard K. Kramer

Proposed Classification

US. C1.355/246 Int. C1. G03n 01/10

XEROX DISCLOSURE JOURNAL - VO~. 18, NO. 4 July/August 1993 401

[This page contains 1 picture or other non-text object]

Page 2 of 2

3-LAYER SE/AS ALLOY MEDICAL IMAGING MEMBER(Cont'd)

A medical imaging member having a three layer structure which inhibits the formation of crystallites and reduces the occurrence of powder deficient spot print artifacts is disclosed.

A conventional 0.3% Arsenic-Selenium (As-Se) alloy is an X-ray sensitive material that may be vacuum evaporated and deposited on an aluminum substrate to form an imaging member. In the evaporation process, this alloy is known to fractionate producing selenium rich species early on and arsenic rich species near the end of the evaporation process.

A solution to the fractionation problem which avoids reticulation at the outermost or top layer surface of the alloy due to too high an arsenic level, is to stop the evaporation process short of completion. The abbreviated process leaves both outermost and back alloy or underlying surfaces with relatively constant and low arsenic levels, for example less than 0.3% by weight As.

If nucleation sites reside at either surface, crystallites can form which will result in a print artifact, that is a powder deficient spot. B...