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:
May. 23, 2006
Filed:
Mar. 27, 2003
Yoshiyuki Uno, Okayama, JP;
Akira Okada, Okayama, JP;
Kensuke Uemura, Kamakura, JP;
Raharjo Purwadi, Niigata, JP;
Yoshiyuki Uno, Okayama, JP;
Akira Okada, Okayama, JP;
Kensuke Uemura, Kamakura, JP;
Raharjo Purwadi, Niigata, JP;
Nagata Seiki Kabushiki Kaisha, Tokyo, JP;
Abstract
Method for surface treating a die made of metal in which a low energy, pulsed electron beam, which does not scatter, performs a treatment over a wide area due to presence of anode plasma in a chamber in which the electron beam is formed to smooth and gloss a surface of the die and increase a surface hardness and corrosion resistance of the die. The irradiation may be performed with an energy density not less than 1 J/cmper pulse, at least 5 pulse irradiations and a pulse duration of at least 1 μs. A die subjected to the surface treatment method exhibits improved surface smoothness and glossiness, as well as high corrosion resistance.