Ion implantation surface charge control method and apparatus

Details Ion implantation surface charge control method and apparatus Ion implantation surface charge control method and apparatus

1988-01-11

1989-02-14

Anderson, Bruce C.

Radiant energy

Electrically neutral molecular or atomic beam devices and...

2504921, H01S 100, H01S 900

Patent

active

048048372

ABSTRACT:
An ion beam neutralizer. High energy electrons are directed through an ion beam neutralizing zone or region containing an ionizable gas. As the high energy electrons collide with the gas molecules, they ionize the gas molecules and produce low energy electrons which are trapped by a positively charged ion beam. As high energy electrons pass out of the neutralizing zone they are deflected back to the neutralizing zone by a cylindrical conductor biased to deflect the high energy electrons and an accelerating grid for accelerating the electrons back through the beam neutralizing zone.

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patent: 3507709 (1970-04-01), Bower
patent: 4135097 (1979-01-01), Forneris et al.
patent: 4361762 (1982-11-01), Douglas
patent: 4463255 (1984-07-01), Robertson et al.
patent: 4585945 (1986-04-01), Bruel et al.
patent: 4595837 (1986-06-01), Wu et al.

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