Samsung Electronics Co., Ltd.

Myong-Do Ro

Kun-Ho Cho

Joong-Eon Seo

Chul-Woo Lee

Dong-Ho Shin

Seung-Tae Jung

Byeong-Ho Park

In-Oh Hwang

Yoon-Gi Kim

Dae-sik Kim

Chul-woo Lee

Jang-hoon Yoo

Young-man Ahn

Chang-min Park

Seung-tae Jung

Dong-seob Jang

An optical data storage system writes or reads information with respect to an optical storage medium using an optical pickup including a solid immersion optical system or a solid immersion lens for generating a near-field and emitting a light beam. The optical storage medium includes a recording layer which is formed on a surface of an optical transmissive layer opposite to another surface of the optical transmissive layer which opposes the solid immersion optical system or solid immersion lens. The thickness of the optical transmissive layer is larger than one wavelength of the light beam. The interval between the surfaces of the solid immersion lens or solid immersion optical system and the optical transmissive layer is smaller than one wavelength of the light beam. Thus, the light beam reflected from the inside of an air gap and the inside of the optical storage medium between the air gap and the recording layer does not function as noise with respect to the light reflected from the recording layer. Also, since the thickness of a protective layer or a substrate which is an external surface of the optical storage medium can be thickened, information can be written or read with respect to the optical storage medium even when the optical storage medium has dust and/or damage.

Near-field optical storage medium and optical data storage system therefor

A swing-arm type optical recording and reproducing apparatus and an optical disk applicable to the same. The optical disk includes a substrate having an information recording surface to record and reproduce an information signal, and a protective layer which is provided on the information recording surface and whose surface facing a slider is a flat even surface so that variations in a floating height of the slider can be reduced. The optical recording and reproducing apparatus further includes, an optical head having a light source provided at a swing arm to emit light of a predetermined wavelength; an optical path changing means provided in the optical path of the light emitted from the light source for changing the proceeding path of incident light; a collimating lens installed at the slider to preliminarily converge the light emitted from the light source and entering via the optical path changing means; an objective lens installed at the slider to converge the light which is emitted from the light source and enters via the optical path changing means to form an optical spot on the optical disk; and a photodetector to receive the light which is reflected from the optical disk and enters via the objective lens, the collimating lens, and the optical path changing means. The optical head detects an information signal and an error signal in order to reduce defocus due to variations in ambient temperature and variations in the wavelength of the light of the light source.

Optical recording and reproducing apparatus having floating swing arm and optical disk for use therewith

A method for manufacturing a master disk for forming an optical disk, including the steps of forming an SiO,film on a substrate; coating a first photoresist layer on the SiO,film; exposing the first photoresist layer according to patterns of a groove formation recess and a land formation protrusion corresponding to a groove and a land, respectively; etching the first photoresist layer and the SiO,film, to thereby form the groove formation recess and the land formation protrusion on the SiO,film; coating a second photoresist layer on the SiO,film, to thereby form the groove and the land at positions corresponding to the groove formation recess and the pit protrusion, respectively; exposing the second photoresist layer according to patterns of a pit where predetermined information is recorded; and etching the second photoresist layer, to thereby form the pits in the groove and the land.

Manufacturing method of a master disk for forming an optical disk, and the master disk

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Suwon, South Korea

Myong-Do Ro