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Thin-film characterization and flaw detection. Progress report No. 7, February 1, 1993--January 31, 1994
Objective is to determine the elastic constants of thin films deposited on substrates, measure residual stresses, and detect and characterize defects in thin film substrate configurations. A line-focus acoustic microscope is being used to measure speed of surface acoustic waves (SAW) in thin film/substrate system. V(z) curves (record of transducer voltage output (V) with variation of distance z between acoustic lens and specimen) were calculated in terms of characteristic functions of acoustic lens and reflectance function of fluid-loaded specimen, and were compared with data for isotropic, anisotropic, and layered anisotropic materials. For thin film/substrate of known elasticity, theoretical surface acoustic wave velocities agree with measured V(z) curves for full range of wave propagation directions. Results have been obtained for homogeneous nitride films and transition-metal nitride superlattice films.
Date:
November 24, 1993
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 89, No. 50, Ed. 1 Wednesday, November 24, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 24, 1993
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Blue River
Photograph of a trout fishing scene on the Blue River.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Pecan Harvest
Photograph of a scene during the pecan harvest, in Eastern Oklahoma.
Date:
November 24, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History