KR960011893A - Short-wavelength magneto-optical disk - Google Patents

Short-wavelength magneto-optical disk Download PDF

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Publication number
KR960011893A
KR960011893A KR1019940025195A KR19940025195A KR960011893A KR 960011893 A KR960011893 A KR 960011893A KR 1019940025195 A KR1019940025195 A KR 1019940025195A KR 19940025195 A KR19940025195 A KR 19940025195A KR 960011893 A KR960011893 A KR 960011893A
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KR
South Korea
Prior art keywords
magneto
recording
optical disk
layer
wavelength
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Application number
KR1019940025195A
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Korean (ko)
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KR100225109B1 (en
Inventor
안용진
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019940025195A priority Critical patent/KR100225109B1/en
Publication of KR960011893A publication Critical patent/KR960011893A/en
Application granted granted Critical
Publication of KR100225109B1 publication Critical patent/KR100225109B1/en

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature

Abstract

본 발명은 광자기 효과가 우수한 단파장용 광자기 디스크의 기판상에 유전체막으로서 제1,2유전체막을 분리적층 형성시키고 기록막으로서 기록된 정보를 재생하는 재생층과 데이타를 기록하는 기록층을 분리적층 형성하므로써, 단파장 레이저(파장이 532㎚ 이하)를 사용하는 경우에도 광자기 효과가 우수하여 kerr회전각이 증가하며 정보의 기록시 기록파우어를 감소시켜 고밀도 광자기 기록이 가능하도록 된 것이다.According to the present invention, a first and second dielectric films are separately formed as a dielectric film on a substrate of a short-wavelength magneto-optical disk having excellent magneto-optical effect, and a reproduction layer for reproducing recorded information as a recording film and a recording layer for recording data are separated. By stacking, even when a short wavelength laser (wavelength: 532 nm or less) is used, the magneto-optical effect is excellent, the kerr rotation angle increases, and the recording power is reduced when information is recorded to enable high-density magneto-optical recording.

Description

단파장용 광자기 디스크Short-wavelength magneto-optical disk

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명에 의한 디스크의 종단면도.2 is a longitudinal sectional view of a disk according to the present invention.

제3도는 기록층과 재생층의 두께비에 따른 kerr회전각의 관계를 나타낸 그래프.3 is a graph showing the relationship of the kerr rotation angle to the thickness ratio of the recording layer and the reproduction layer.

제4도는 기록층과 재생층의 두께비에 따른 기록파우어의 관계를 나타낸 그래프.4 is a graph showing the relationship between the recording power and the thickness ratio of the recording layer and the reproduction layer.

Claims (7)

투명한 기판(1)상에 유전체막(2), 기록막(3), 절연막(4), 반사막(5)을 순서적으로 적층한 단파장용 광자기 디스크에 있어서, 상기 유전체막(2)은 제1, 2유전체막(2A), (2B)으로 분리형성시키고, 기록막(3)은 기록된 정보를 재생하는 재생층(3A)과 정보를 기록하는 기록층(3B)으로 분리적층 형성시킴을 특징으로 하는 단파장용 광자기 디스크.In a short-wavelength magneto-optical disk in which a dielectric film 2, a recording film 3, an insulating film 4, and a reflective film 5 are sequentially stacked on a transparent substrate 1, the dielectric film 2 is formed of a first wavelength. 1, 2 dielectric films 2A, 2B are formed separately, and the recording film 3 is formed separately from a reproduction layer 3A for reproducing recorded information and a recording layer 3B for recording information. A short wavelength magneto-optical disk characterized by the above-mentioned. 제1항에 있어서, 상기 재생층(3A)의 두께(t1)과 기록층(3B)의 두께(t2)의 비는 0.3〈t2/t1〈1.0 범위인 것을 특징으로 하는 단파장용 광자기 디스크.Claim for the short wavelength, characterized in that the method, ratio of 0.3 <t 2 / t 1 < 1.0 range of the thickness (t 2) of the reproducing layer (3A) a thickness (t 1) and the recording layer (3B) of the 1 Magneto-optical disk. 제2항에 있어서, 상기 재생층(3A)의 두께(t1)과 기록층(3B)의 두께(t2)의 비는 0.5〈t2t1〈0.9범위인 것을 특징으로 하는 단파장용 광자기 디스크.The method of claim 2, wherein the reproducing layer (3A) a thickness (t 1) and the recording ratio of the thickness (t 2) of the layer (3B) is a light for a short wavelength, characterized in that 0.5 <t 2 t 1 <0.9 range Magnetic disk. 제1항에 있어서, 상기 제1유전체막(2A)의 굴절율(n1)과 제2유전체막(2B)의 굴절율(n2)은 1.6n〈1n2〈3.5범위인 것을 특징으로 하는 단파장용 광자기 디스크.The method of claim 1, wherein the first refractive index of the dielectric film (2A) (n 1) and the second refractive index of the dielectric film (2B) (n 2) is a short wavelength, characterized in that 1.6n <1 n 2 <3.5 range Magneto-optical disk. 제4항에 있어서, 상기 제1유전체막(2A)의 굴절율(n1)과 제2유전체막(2B)의 굴절율(n2)은 1.3n〈2n1〈1.8범위인 것을 특징으로 하는 단파장용 광자기 디스크.The method of claim 4, wherein the first refractive index of the dielectric film (2A) (n 1) and the second refractive index of the dielectric film (2B) (n 2) is a short wavelength, characterized in that 1.3n <2 n 1 <1.8 range Magneto-optical disk. 제1항에 있어서, 상기 재생층(3A)의 큐리온도(Tc1)는 기록층(3B)의 큐리온도(Tc2)보다 낮게 형성된 것을 특징으로 하는 단파장용 광자기 디스크.The short-wavelength magneto-optical disc according to claim 1, wherein the Curie temperature (Tc 1 ) of the reproduction layer (3A) is lower than the Curie temperature (Tc 2 ) of the recording layer (3B). 제1항에 있어서, 상기 재생층 (3A)은 NdTbFeCo또는 PrTbFeCo로 구성되고, 기록층(3B)은 TbFeCo또는 TbFeCoCr으로 구성됨을 특징으로 하는 단파장용 광자기 디스크.The magneto-optical disk for short wavelength according to claim 1, wherein the reproduction layer (3A) is composed of NdTbFeCo or PrTbFeCo, and the recording layer (3B) is composed of TbFeCo or TbFeCoCr. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940025195A 1994-09-30 1994-09-30 Optic-magneto disc KR100225109B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940025195A KR100225109B1 (en) 1994-09-30 1994-09-30 Optic-magneto disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940025195A KR100225109B1 (en) 1994-09-30 1994-09-30 Optic-magneto disc

Publications (2)

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KR960011893A true KR960011893A (en) 1996-04-20
KR100225109B1 KR100225109B1 (en) 1999-10-15

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KR1019940025195A KR100225109B1 (en) 1994-09-30 1994-09-30 Optic-magneto disc

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100254609B1 (en) * 1997-01-06 2000-05-01 구자홍 Optical disc reproducer
KR100340656B1 (en) * 1998-09-10 2002-06-20 마찌다 가쯔히꼬 Magneto-optical recording medium and process for producing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100254609B1 (en) * 1997-01-06 2000-05-01 구자홍 Optical disc reproducer
KR100340656B1 (en) * 1998-09-10 2002-06-20 마찌다 가쯔히꼬 Magneto-optical recording medium and process for producing the same

Also Published As

Publication number Publication date
KR100225109B1 (en) 1999-10-15

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