Accession Number:

ADA064933

Title:

Investigation of Web-Dendrite Silicon.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1978-12-01

Pagination or Media Count:

170.0

Abstract:

Web-dendrite silicon was investigated to establish its potential value as a starting material for the fabrication of infrared detector arrays. The van der Pauw techniques was used to measure the electrical transport properties of this material and assess its homogeneity. A total of eight samples were prepared from boron-doped, gallium-doped, and undoped web provided by the Westinghouse Electric Corporation. The samples were evaluated with respect to growth direction and position in the web. The growth procedures of web silicon are discussed including a description of the defects common to this material. The results are analyzed to determine uniformity, impurity concentrations, and the activation energy of the majority carriers. These particular web specimens are not suitable as candidates for device fabrication, due to the large numbers of dislocationsdefects they were found to contain. It is not known whether the dislocations and defects observed are common to all dendritic-web materials. Author

Subject Categories:

  • Ceramics, Refractories and Glass
  • Crystallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE