Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1979-05-18
1981-02-10
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
204192EC, 204298, C23C 1500
Patent
active
042500095
ABSTRACT:
An energetic particle beam is accelerated towards a sputtering target. The target is located at an angle to the path of the beam (although it need not be). The target material which is dislodged by the ion beam can be directed towards a substrate. The material is composed of atoms forming both positive and negative ions. The voltage difference between the target and the substrate can be adjusted to be positive or negative so that either positive ions or negative ions can be accelerated to the substrate by means of adjusting the target-substrate voltage difference. In addition, means can be provided for collecting electrons included with the ions moving towards and away from the target. Such means can comprise a grid located adjacent to the target. It is also possible that electrons can be collected by means of an electric field confining structure which permits the ions to pass through while the electrons are deflected. Techniques. used elsewhere to separate electrons from ions have included bending beams to fit through apertures and use of magnetic grids to deflect electrons differentially. In both cases, the degree of deflection of ions is far different because the mass of an ion is large relative to the mass of an electron which makes separation easy. The advantage here is that the sputter deposition makes it possible to deposit positive and negative ions alternately or in a desired graded mixture at an interface under gradually changing voltage control.
REFERENCES:
patent: 4108751 (1978-08-01), King
patent: 4132614 (1979-01-01), Cuomo et al.
Cuomo Jerome J.
Gambino Richard J.
Harper James M.
Kupstis John D.
International Business Machines - Corporation
Jones II Graham S.
Kaplan G. L.
Leader William
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