Diamondlike Carbon Coatings for Optical Systems

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Abstract:

Diamondlike carbon DLC coatings have been deposited on seven infrared transmitting substrates utilizing three different techniques ion-beam deposition, rf-plasma discharge, and hollow cathode discharge methods. Optimum deposition parameters for each technique have been established as a function of substrate material. Extensive characterization of the DLC films was also performed. Rutherford backscattering and proton recoil detection techniques were used to analyze carbon and hydrogen content and impurities. These films contain typically 70 C and 30 H. Transmission electron microscopy was used to analyze the crystallinity, void structure, surface microstructure, and thickness of the films which were found to be amorphous and dense. Optical properties such as refractive index, extinction coefficient, and optical band gap of the films were determined by variable angle spectroscopic ellipsometry VASE over the special range from 300 nm to 10.6 micron. Optical properties were found to be related to the preparation procedure used. The thermal stability, moisture penetration, rain erosion, and sand ballistic impact effects on these DLC films were extensively investigated. The effect of high energy ion radiation on DLC films was studied. Details of preparation methods and characterization of DLC films are presented. Keywords Protective coatings Antireflection coatings Optical coatings Thin films Ellipsometry.

Author(s):
Wu, R. ; Ingram, D. ; Mccormick, A. ; Rai, A. ; Pronko, P. ; Woollam, J. ; De, B. ; Ianno, N.
Author Organization(s):
UNIVERSAL ENERGY SYSTEMS INC DAYTON OH
Descriptive Note:
Final rept. Sep 1986-Sep 1988
Pagination:
0119

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MTL-TR-89-13
Contract/Grant Number(s):
DAAL04-86-C-0030
Monitor Series:
TR-89-13
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_1.2.3_Educating; JCA_5.2_Understand; JCA_5.3_Planning; JCA_4.6_Engineering; JCA_1.2.7_Experimentation; JCA_1.2.5_Lessons Learned; JCA_4.7.2_Installation Services; JCA_4.7_Base and Installations Support
Modernization Areas:
Directed Energy; Microelectronics
Communities of Interest:
Advanced Electronics
Descriptor(s):
*OPTICAL COATINGS, *CARBON, *ANTIREFLECTION COATINGS, OPTICAL EQUIPMENT, OPTICAL PROPERTIES, RADIATION, THICKNESS, MICROSTRUCTURE, OPTIMIZATION, DETECTION, IMPACT, PREPARATION, SPECTROSCOPY, PARAMETERS, MATERIALS, THIN FILMS, REFRACTIVE INDEX, FILMS, DIAMONDS, THERMAL STABILITY, SAND, SUBSTRATES, ION BEAMS, BACKSCATTERING, PROTONS, IMPURITIES, VOIDS, HYDROGEN, VARIABLES, ELECTRON MICROSCOPY, TRANSMITTANCE, SURFACES, HIGH ENERGY, COATINGS, DEPOSITION, CATHODES, PENETRATION, COEFFICIENTS, PROTECTIVE COATINGS, RECOIL, ELLIPSOMETERS, MOISTURE, BALLISTICS, INFRARED TRANSMITTERS, EXTINCTION, RAIN EROSION, ANGLES, IONS
Field(s)/Group(s):
Coatings, Colorants and Finishes, Optics
Keyword(s):
*DIAMONDLIKE CARBON COATINGS
Report Date:
1989 Feb 01