Browse Prior Art Database

Location of a Thermocouple for Accurate, Constant Temperature Readings During CdS Evaporations

IP.com Disclosure Number: IPCOM000096642D
Original Publication Date: 1963-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Casey, CW: AUTHOR

Abstract

An evaporation source of the Drumheller type is shown. It comprises inner screen cylinder 1 positioned within nonperforated crucible 3 by lower annular spacer 5 and annular cap 7. Crucible 3 is positioned within cylindrical resistance heater 9. When heater 9 is operated, evaporant material 1 1, e. g., CdS, loaded between inner cylinder 1 and crucible 3, vaporizes and passes through inner cylinder 1.

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 100% of the total text.

Page 1 of 2

Location of a Thermocouple for Accurate, Constant Temperature Readings During CdS Evaporations

An evaporation source of the Drumheller type is shown. It comprises inner screen cylinder 1 positioned within nonperforated crucible 3 by lower annular spacer 5 and annular cap 7. Crucible 3 is positioned within cylindrical resistance heater 9. When heater 9 is operated, evaporant material 1 1, e. g., CdS, loaded between inner cylinder 1 and crucible 3, vaporizes and passes through inner cylinder 1.

A ceramic two-hole tube 13 is inserted in the base of crucible 3. Wires 15 for thermocouple junction 17 are threaded through tube 13. Junction 17 is positioned in the vapor stream to avoid build-up of CdS evaporant on it. Thus, a continuous and accurate determination of the CdS evaporant temperature is obtained.

1

Page 2 of 2

2

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