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. 28, 2001
Filed:
Apr. 11, 2000
Tetsuya Iida, Tsurugashima, JP;
Takanobu Higuchi, Tsurugashima, JP;
Hironao Sasaki, Tsurugashima, JP;
Kunizo Ogoshi, Tsurugashima, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
An optical disc is prepared by the steps of coating a positive photoresist comprising a photosensitive material and a base resin, satisfying a value of A in a formula A=(a,−a,) m,and a value of B in a formula B=(a,m,+a,m,), being constant, is in a range of B value <,on a glass substrate to form a resist film, forming a pit pattern through a light exposure to the resist film, developing the resist film after the light exposure to form a resist original, effecting a plating treatment to the resist original to form a stamper through an electrocasting treatment, forming a replica disc through an injection molding process by utilizing the stamper, forming a reflection film on the replica disc, and forming an overcoat layer on the reflection film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile