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:
Aug. 18, 1992
Filed:
Feb. 28, 1991
Applicant:
Inventors:
Assignee:
TDK Corporation, , JP;
Primary Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
454187 ; 118719 ; 20429825 ; 414217 ; 414786 ;
Abstract
A clean transfer method capable of safely transferring a semiconductor or the like to various apparatus for treating the semiconductor while keeping the environment clean. In the method, the semiconductor is transferred between a vacuum clean box arranged in a clean room and kept at the degree of vacuum of 1 Torr or less and a vacuum chamber arranged in a maintenance room while transfer ports of the vacuum clean box and vacuum chamber are kept air-tightly connected to each other. The vacuum clean box is movably arranged.