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Title: Beam pattern control system for an ion implanter

Patent ·
OSTI ID:6785037

This patent describes an improvement in an ion implanter. It comprises: comprising a vacuum chamber, wafer-receiving support means within the vacuum chamber, means for directing an ion beam onto a wafer received on the support means, and a first aperture plate having a beam defining aperture formed therein positioned to intercept the beam upstream of the support means. The improvement is in that the aperture formed in the aperture plate is elliptical.

Assignee:
Eaton Corp., Cleveland, OH (USA)
Patent Number(s):
US 4943728; A
Application Number:
PPN: US s 7-317225; TRN: 90-029934
OSTI ID:
6785037
Resource Relation:
Patent File Date: 28 Feb 1989
Country of Publication:
United States
Language:
English