The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1991
Filed:
May. 14, 1990
Mamoru Nogami, Kyoto, JP;
Nobuo Nagai, Kyoto, JP;
Nissin Electric Company, Limited, Kyoto, JP;
Abstract
In an ion implantation apparatus comprising scanning electrodes for electrically scanning an ion beam in an X direction, a scanning power supply for supplying a scanning power to the scanning electrodes, a drive unit for mechanically scanning a target in a Y direction substantially perpendicular to the X direction, a beam current measurement device disposed at one end section of the scanning area of the ion beam for measuring a beam current of the ion beam, and a control unit for computing the scanning speed of the target based on the beam current measured by the beam current measurement device and for controlling the drive unit so that the target is driven at the computed speed, the control unit outputs a trigger signal whenever the computation process of the scanning speed of the target is completed, and the scanning power supply outputs the scanning power for one reciprocative scanning operation of the ion beam at every time the scanning power supply receives the trigger signal from the control unit.