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:
Sep. 10, 2002
Filed:
Jan. 02, 2002
Yasuyuki Mitsuoka, Chiba, JP;
Norio Chiba, Chiba, JP;
Nobuyuki Kasama, Chiba, JP;
Takashi Niwa, Chiba, JP;
Kunio Nakajima, Chiba, JP;
Kenji Kato, Chiba, JP;
Manabu Oumi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A near-field optical head which reproduces, with high S/N, information recorded with extreme density and is compact in structure. On an electrode ( ) is formed a recording medium ( ) that emits a light by applying an electric field. Brought into proximity to a recording medium ( ) is a near-field optical head ( ) having a slider ( ) formed with an inverted cone formed hole such that an apex thereof is rendered as a microscopic aperture ( ). A microscopic electrode ( ) is formed on a side surface ( ) of the inverted cone formed hole. An electric field ( ) is applied only to a microscopic region to cause light emission. It is possible at the aperture ( ) to detect a light emitted only by the microscopic region.