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:
Oct. 08, 2019
Filed:
Apr. 12, 2018
Tokyo Electron Limited, Tokyo, JP;
Shin Matsuura, Miyagi, JP;
Masato Horiguchi, Miyagi, JP;
TOKYO ELECTRON LIMITED, Tokyo, JP;
Abstract
A pin control method includes: measuring respective height positions of a plurality of pins, which is vertically driven respectively by a plurality of driving units while supporting a substrate; selecting a reference pin, which serves as a reference for speed control, from the plurality of pins using the measured height positions of the plurality of pins; estimating, with respect to the selected reference pin, a reference height position, which is a height position after a predetermined time has passed since the height positions of the plurality of pins were measured; calculating an adjustment speed for making the height positions of the pins other than the reference pin match with the estimated reference height position; controlling the driving units, which drive the other pins, to adjust driving speeds of the other pins to the adjustment speed.