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:
Nov. 28, 1995
Filed:
Feb. 16, 1994
Noriyuki Igarashi, Gyoda, JP;
Keiichi Fukumoto, Kitamoto, JP;
Advantest Corporation, Tokyo, JP;
Abstract
transport mechanism for integrated circuit (IC) handlers with four transport stations spaced 90.degree. apart on one circumference are supported by a cross-shaped contact arm, and below the circumference, contact-in, contact or test and contact-out stages are provided at intervals of 90.degree.. Each transport station has a vertically movable air chuck unit and an air chuck driving mechanism for driving the air chuck unit vertically and holding by suction and releasing devices under test. The transport station that has reached a predetermined position above the contact-in stage presses the air chuck unit down with the air chuck driving mechanism and suck and lifts the devices to be tested off the contact-in stage. In parallel with the operation at the contact-in stage, the transport station, staying above the contact or test stage, lowers the air chuck unit which holds devices to be tested and fixes them onto the contact or test stage to start testing them, and the transport station above the contact-out stage lowers the air chuck unit holding tested devices and releases them onto the contact-out stage, thereafter raising the empty air chuck unit. Each time the contact arm is turned 90.degree., these operations are repeated.