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US 6,743,465 B2Granted
Magnetic optical member with a polymer substrate
AssigneeMinebea Co., Ltd.
InventorsMitsuteru Inoue, Toshitaka Fujii, Akio Takayama, Atsushi Kitamura, Shigeyuki Adachi, Hideki Kato
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Abstract
This invention provides a magnetic optical member that can obtain a large magneto-optical effect using a rare-earth iron-garnet-based material and a method of producing the same.
Claims2
A method of producing a magnetic optical member comprising:
- two dielectric multi-layer films having a cyclic structure in which plural kinds of dielectric materials having different optical characteristics are alternately laminated with regularity in thickness;
- a magnetic optical thin film of rare earth iron-garnet placed between one of two dielectric multi-layer films and the other of two dielectric multi-layer films;
- and
- a polymeric substrate on which said magnetic optical thin film and two dielectric multi-layer films are formed;
- wherein:
- said magnetic optical thin film is laminated over said polymeric substrate with one of said two dielectric multi-layer films interposed therebetween, while placing said polymeric substrate over a water-cooled substrate holder through an indium sheet;
- a glassy carbon is placed on a surface of said magnetic optical thin film;
- and
- said glassy carbon is heated by pulse heating with intermittent irradiation by an infrared beam to crystallize said magnetic optical thin film without deforming said polymeric substrate.
6 more elements
A method of producing a magnetic optical member comprising:
- two dielectric multi-layer films having a cyclic structure in which plural kinds of dielectric materials having different optical characteristics are alternately laminated with regularity in thickness;
- a magnetic optical thin film of rare earth iron-garnet placed between one of two dielectric multi-layer films and the other of two dielectric multi-layer films;
- and
- a polymeric substrate on which said magnetic optical thin film and said two dielectric multi-layer films are formed;
- wherein:
- said magnetic optical thin film is laminated over said polymeric substrate with one of said two dielectric multi-layer films interposed therebetween, and said polymeric substrate is directly cooled;
- a glassy carbon is placed on a surface of said magnetic optical thin film;
- and
- said glassy carbon is heated by pulse heating with intermittent irradiation by an infrared beam to crystallize said magnetic optical thin film without deforming said polymeric substrate.
6 more elements
Dependencies are inferred from the claim text.