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:
May. 26, 1992
Filed:
Jun. 23, 1991
Hiroaki Andon, Tokyo, JP;
Michio Ohshima, Tokyo, JP;
Yuji Matsui, Tokyo, JP;
Takashi Okuyama, Tokyo, JP;
Toshitaka Yoshimura, Tokyo, JP;
Hidetaka Yamaguchi, Tokyo, JP;
Yasushi Ikeda, Tokyo, JP;
Jun Nonoka, Tokyo, JP;
Tamihiro Miyoshi, Tokyo, JP;
Mitsuo Kakimoto, Tokyo, JP;
Masatoshi Iwama, Tokyo, JP;
Hideyuki Morita, Tokyo, JP;
Satoru Tachihara, Tokyo, JP;
Akira Morimoto, Tokyo, JP;
Akira Ohwaki, Tokyo, JP;
Asahi Kogaku Kogyo K.K., Tokyo, JP;
Abstract
A scanning pattern drawing apparatus which scans the surface of a workpiece with a light beam so that a pattern is described on the workpiece with the issued light beam being controlled on the basis of pattern drawing data stored in a pattern memory, wherein the pattern drawing apparatus is able to read many pieces of data in a short period of time even if the frequency of the timing pulses is reduced and which therefore is capable of drawing a precise pattern on a workpiece. A scanning pulse generator produces as scanning pulse in response to a predetermined amount of scanning with the light beam. The scanning pulse is converted to a plurality of resulting timing pulses, and successive parallel outputs of the timing pulses are produced after delaying by a predetermined time. The pattern drawing data is read from the pattern memory in response to the delayed timing pulses.