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. 14, 2007
Filed:
Apr. 21, 2004
Yuzo Mori, Katano-shi, Osaka, JP;
Mitsuhiko Shirakashi, Fujisawa, JP;
Yasushi Toma, Settsu, JP;
Itsuki Kobata, Fujisawa, JP;
Takayuki Saito, Hiratsuka, JP;
Yuzo Mori, Katano-shi, Osaka, JP;
Mitsuhiko Shirakashi, Fujisawa, JP;
Yasushi Toma, Settsu, JP;
Itsuki Kobata, Fujisawa, JP;
Takayuki Saito, Hiratsuka, JP;
Ebara Corporation, Tokyo, JP;
Other;
Abstract
An electrochemical machining apparatus comprises a machining chamber for holding ultrapure water, a cathode/anode immersed in the ultrapure water held in the machining chamber, and a workpiece holding portion for holding a workpiece at a predetermined distance from the cathode/anode so that a surface, to be machined, of the workpiece is brought into contact with the ultrapure water. The electrochemical machining apparatus further comprises an anode/cathode contact brought into contact with the workpiece held by the workpiece holding portion so that the workpiece serves as an anode/cathode, a catalyst having a strongly basic anion exchange function or a strongly acidic cation exchange function, a power source for applying a voltage between the cathode/anode and the workpiece, and a moving mechanism for relatively moving the workpiece and the catalyst. The catalyst is disposed between the cathode/anode and the workpiece held by the workpiece holding portion.