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. 07, 2010
Filed:
Dec. 12, 2008
Junichi Hagihara, Nirasaki, JP;
Junichi Hagihara, Nirasaki, JP;
Tokyo Electron Limited, Tokyo, JP;
Abstract
An inspection apparatus includes a movable mounting table having a temperature control device, an elevation drive unit for vertically moving the mounting table, a controller for controlling the elevation drive unit and a probe card having probes arranged above the mounting table. The elevation drive unit includes first and second driving shafts connected to each other through coupling members to drive the mounting table, a motor for driving the first and second driving shafts, and a torque detection unit for detecting a torque between the first and second driving shafts based on a contact load between the probes and the at least one device. The controller includes a torque controller for controlling the torque based on detection results of the torque detection unit when the probe card expands or contracts due to temperature variation.