scholarly journals Special issue/EMI shielding EMI shielding by Al-Vacuum deposition.

1991 ◽  
Vol 42 (1) ◽  
pp. 29-32
Author(s):  
Akira MOTOKI
Keyword(s):  
Vacuum Deposition ◽  
Emi Shielding ◽  
Special Issue

A New Fine-Structure Observed in Electron-Diffraction Rings

1973 ◽  
Vol 31 ◽  
pp. 48-49
Author(s):  
J. M. Corbett ◽  
J. Fairchild ◽  
F. W. Boswell
Keyword(s):  
Fine Structure ◽  
Electron Diffraction ◽  
Vacuum Deposition ◽  
Smoke Particles

Fine-structure in spotty electron diffraction riiig patterns has previously been observed for specimens made up of MgO smoke particles of cubic morphology. This fine-structure was shown to arise from refraction effects in the small cubes (Sturkey & Frevel). We have recently observed a different type of fine structure in patterns from MgO films prepared by vacuum deposition (Fig. 1). This fine-structure consists of sets of regularly spaced fringes occurring at random orientations in the rings. The fringes may be seen in Fig. 2 which shows a segment of the (200) ring magnified 7x from the pattern in Fig. 1. It was considered possible that each set of fringes might arise from two superimposed diffraction’ spots from suitably situated crystallites in the specimen. Experiments have been conducted which clearly demonstrate that the fringes do in fact arise in this way.

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