Vacuum evaporation and deposition

Details Vacuum evaporation and deposition Vacuum evaporation and deposition

1988-11-10

1991-06-25

Bueker, Richard

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156600, 156601, 156610, 4272557, 118706, 118715, C23C 1424

Patent

active

050264540

ABSTRACT:
Method and apparatus for the deposition of material onto a substrate, the method comprising evaporating material from a source, controlling the dosage of material at the substrate by moving a shutter between an open position and a closed position, with a closing step comprising beginning to decelerate said shutter before reaching the closed position, subsequently thereby bringing the shutter substantially to rest at the closed position. Preferably the motion of the shutter is substantially harmonic with the acceleration of the shutter being directed towards, and proportional to the distance of the shutter from, the point mid-way between the open and closed positions. Contamination is reduced from prior methods and the invention is especially advantageous in molecular beam epitaxy.

REFERENCES:
patent: 4411728 (1983-10-01), Sakamoto
patent: 4575462 (1986-03-01), Dobson
patent: 4640720 (1987-02-01), Foxon
patent: 4681773 (1987-07-01), Bean

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