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:
Jun. 29, 1993
Filed:
Sep. 27, 1991
Fumikazu Itoh, Fujisawa, JP;
Akira Shimase, Yokohama, JP;
Satoshi Haraichi, Yokohama, JP;
Junzou Azuma, Yokohama, JP;
Hitachi, Ltd, Tokyo, JP;
Abstract
There is disclosed an ion beam processing method of processing a rotating workpiece for a very small-size rotary member, using an ion beam or a focused ion beam. Apparatus for performing this method is also disclosed. In the formation of a product having a non-circular cross-section, when the amount of application of the ion beam is kept constant, the rotational angular velocity of the workpiece is varied in accordance with the rotational angular position of the workpiece. On the other hand, when the rotational angular velocity of the workpiece is kept constant, the amount of application of the ion beam is varied. When it is difficult to align the axis of the workpiece with the axis of rotation of a workpiece holder, the focused ion beam is applied in accordance with the oscillation of the workpiece.