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. 19, 1996
Filed:
Jun. 29, 1995
Tokyo Electron Limited, , JP;
Abstract
A main pump having a wide range of vacuum exhaust capabilities and a high exhaust speed is connected adjacent to a processing chamber and an auxiliary pump having a low exhaust speed is connected by a small-diameter auxiliary pipeline to the exhaust side of the main pump. Since a main pump having a wide range of vacuum exhaust capabilities and a high exhaust speed is connected adjacent to the processing chamber in this manner, not only can improvements in the exhaust characteristics be expected, but it is also possible to reduce the diameter of the auxiliary pipeline from the main pump onward and make the auxiliary pump smaller. Since the auxiliary pump having a low exhaust speed is connected by a small-diameter auxiliary pipeline to the exhaust side of the main pump, the size and cost of the entire system can be reduced.