Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1977-05-10
1978-10-31
Prescott, Arthur C.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
204180R, 204299EC, 204181R, 350355, 350350, 40463, C25D 112, G03G 1300
Patent
active
041233468
ABSTRACT:
An electrophoretic device defining a fluid tight assembled container filled with a suspension of solid electrically charged particles. Two outer plates of the container are provided with electrodes and part of the inner walls of the container and electrodes are coated with an electret layer that is a layer of dielectric material carrying permanent electrical charges. The electret layer coating one of the outer plates may be removable in order to allow the transfer of the solid electrically charged particles between different electrophoretic media. One of the outer plate may be either transparent allowing thus a presentation of data. The permanent electrical charges of the electret layer introduce a voltage treshold into the control of migration of the suspended particles in the electrophoretic medium.
REFERENCES:
patent: 3756693 (1973-09-01), Ota
patent: 3839857 (1974-10-01), Berets et al.
patent: 3892472 (1975-07-01), Giglia
patent: 4045327 (1977-08-01), Noma et al.
"Thomson-CSF"
Plottel Roland
Prescott Arthur C.
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