KR20010024430A - 광학 저장용 매체 - Google Patents

광학 저장용 매체 Download PDF

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KR20010024430A
KR20010024430A KR1020007003682A KR20007003682A KR20010024430A KR 20010024430 A KR20010024430 A KR 20010024430A KR 1020007003682 A KR1020007003682 A KR 1020007003682A KR 20007003682 A KR20007003682 A KR 20007003682A KR 20010024430 A KR20010024430 A KR 20010024430A
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South Korea
Prior art keywords
dye
storage medium
layer
optical storage
recording
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KR1020007003682A
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English (en)
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라이너 베스퍼
하르트무트 뢰베르
라이문트 치메르만
빌프리트 하에제
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빌프리더 하이더
바이엘 악티엔게젤샤프트
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Publication of KR20010024430A publication Critical patent/KR20010024430A/ko

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Abstract

본 발명은 보호층, 하나 이상의 기록층, 임의로 반사층 및 하나 이상의 지지체층을 포함하는 기록성 광학 저장용 매체에 관한 것이다. 지지체층은 기록 및(또는) 판독용으로 사용되는 레이저 파장에서 70 % 이상의 투과율을 가지며 레이저광의 파장 보다 100 nm 이상 더 짧은 가시광의 모든 다른 파장에서 70 % 이상의 흡수율을 갖는 1종 이상의 착색제를 함유한다.

Description

광학 저장용 매체 {Optic Storage Medium}
본 발명은 특히, 특정 지지체 층을 포함하는 단일 또는 다중 기록성 컴팩트 디스크(CD) 형태의 기록성 광학 저장용 매체에 관한 것이다.
데이타 기록 및 판독이 레이저광에 의해 수행되는 통상의 광학 저장용 매체, 특히 CD-R은 투명 지지체, Te, Bi 또는 Mn과 같은 금속 또는 시아닌, 메로시아닌, 프탈로시아닌 또는 아조 염료와 같은 염료를 포함하는 기록층, 금속성 반사층 및 임의로 보호층으로부터 형성된다. 데이타 기록은 투명 지지체를 통한 레이저광 조사에 의해 수행된다. 이 과정 중, 기록층은 조사된 지점에서 변형, 승화, 증발 또는 개질되어, 필요한 경우 피트가 형성된다. 종종, 자유 공간도 또한 기록층 및 인접층 사이에 형성된다. Au, Ag, Al 또는 Cu의 금속성 반사층은 일반적으로 기록층 위에 제공되고, 보호층은 다시 반사층 위에 제공된다. 판독은 또한 투명 지지체를 통하여 저에너지의 레이저광으로 조사하여 수행된다. 저장용 매체의 피트로부터 반사된 광 및 잔류 부분으로부터 반사되는 광 사이의 조영은 전기적 신호로서 판독된다.
통상의 비기록성 CD (ROM 형: read-only-memory)는 전술한 기록층을 포함하지 않으나, 단순히 압축 성형에 의해 지지체 위에 미리 형성된 재생될 데이타에 상응하는 피트를 포함한다. 그이외에는 그의 제작은 비교적 유사하다 (보다 정확한 설명을 위해 A. B. Marchant, Optical Recording (1990) 참조).
공지된 CD-R이 갖는 한가지 문제는 비교적 고감도의 기록층에 있다. 가열 및 조사를 수행하면 기록층은 CD-R이 더 이상 기록될 수 없고(없거나) 더이상 판독될 수 없는 결과로 변경된다. 따라서, 일부 제조업자는 CD-R을 직사광선에 노출하지 않을 것을 추천한다. 장비 제조업자들은, DVD 플레이어에 사용되는 레이저의 단파장이 CD-R을 손상시킬 염려가 있기 때문에 CD-R을 DVD 플레이어에서 작동하지 않을 것을 충고하고 있다. 그다음, 저장된 정보는 단지 에러만로 판독될 수 있으며, 이것은 전자 시험 장비에 의해 측정되고 다른 형태의 표현들 중에서 블록 에러율로 인용된다.
블록 에러율로부터 요약 형태로 결함있는 정보 블록의 전체수가 얻어지며 가능한 적어야한다. 블록 에러율이 220의 값을 초과하는 경우 데이타 저장용 매체는 규격 밖이다. 블록 에러율은 CD 테스트 플레이어를 사용하여 결정된다 (보다 상세한 정보를 위해 W. Schild "Fehler vom Player, Fehler von der Platte", Funkschau 23/1988 참조). 또한, CD-R은 이들이 더 이상 판독되거나 전혀 기록될 수 없는 정도로 변형될 수 있다.
본 발명의 기본적인 목적은 개선된 안정성을 나타내어 개선된 유효 수명을 갖는 기록성 광학 저장용 매체, 특히 기록성 CD를 제공하는 것이다.
상기 목적은, 지지체층이 기록 및(또는) 판독용으로 사용되는 레이저 파장에서 70 % 이상의 투과율을 가지며 레이저광의 파장 보다 100 nm 이상 더 짧은 가시광의 모든 다른 파장에서 70 % 이상의 흡수율을 갖는 1종 이상의 염료를 함유하는 것을 특징으로 하는, 보호층, 하나 이상의 기록층, 임의로 광반사층 및 하나 이상의 지지체층을 포함하는 기록성 광학 저장용 매체의 제조에 의해 달성된다.
지지체층은 목적하는 흡수 특성을 달성하기 위해 바람직하게는 2종 이상의 염료, 가장 바람직하게는 3종의 염료를 함유한다.
염료 또는 염료들은 바람직하게는, 안트라퀴논 및 피라졸론 염료를 포함하는 군으로부터 선택된다. 마크롤렉스겔브 3G (등록상표 Makrolexgelb 3G) (피라졸론 염료, 색상 지수, 파트 1: 솔벤트 옐로우 93), 마크롤렉스로트 5B (등록상표 Makrolexrot) (안트라퀴논 염료, 색상 지수, 파트 1, 솔벤트 레드 52, 파트 2 No. 68210) 및 하이텀 블루 E (등록상표 Hytherm Blue E) (안트라퀴논 염료, 색상 지수 파트 1, 솔벤트 블루 101)이 특히 바람직하다.
지지체층용 물질은 중요하지 않고, 특별히 제한은 없다. 지지체층은 광학 저장용 매체, 특히 CD-R에 사용되는 통상의 물질을 포함하고, 특히 기록 및(또는) 판독에 사용되는 레이저광에 대해 투과성인 중합체, 예를 들어 폴리(코)카르보네이트, 폴리메틸 메타크릴레이트, 폴리-4-메틸펜텐-1, 비결정성 환식 폴리올레핀, 폴리에스테르, 에폭시 수지 또는 폴리아크릴레이트를 포함한다. 특히, 폴리(코)카르보네이트가 사용된다. 지지체는 피트형 정보 신호 및(또는) 제어 신호 및(또는) 가이드 채널을 포함할 수 있고, 즉 임의로 포맷된 정보 신호가 있거나 없는 지지체일 수 있다. 임의로 통상의 방식으로 표면 처리될 수 있다.
염료 또는 염료들은 통상의 방식으로, 예를 들어 염료를 지지체 물질의 과립과 혼합하거나, 또는 염료를 지지체 물질의 과립 위에 침착시킴으로써 지지체 물질에 혼입된다. 바람직하게는, 염료는 또한 마스터 배치로서 첨가될 수 있다.
지지체 물질 중의 염료 또는 염료들의 농도는 바람직하게는 0.1 내지 1.4 중량%, 가장 바람직하게는 0.3 내지 0.8 중량%이다. 지지체는 통상의 방식으로, 예를 들어 사출 성형 또는 스탬핑에 의해 염료 함유 물질로부터 형성된다.
다수의 지지체층이 제공되는 경우, 층들은 바람직하게는 동일한 중합체 물질을 포함한다. 이 경우, 염료 또는 염료들은 단일 지지체층 또는 다수의 지지체층에 혼입될 수 있다.
임의로 제공되는 기록층(들)은 바람직하게는 통상의 민감성 염료 층(들)이다 (예를 들어, 유럽 특허 공개 제353 392호, 제488,231호 및 제410,879호 참조). 염료로서는 1종 이상의 유기 염료, 예를 들어 프탈로시아닌, 메로시아닌, 시아닌, 인도디카르보시아닌, 아줄렌 및 아조 염료가 포함된다. 이들은 통상의 방식으로, 예를 들어 스핀 코팅에 의해 용매 중의 용액으로 침착된다. 예를 들어, 디아세톤 알콜, 테트라플루오로프로판올 등의 플루오르화 알콜, 부탄올 또는 이들의 혼합물이 용매로서 사용된다.
기록층(들)의 염료는 지지체층의 염료와는 상이하다. 시아닌 염료가 특히 바람직하다.
임의로 제공되는 반사층은 바람직하게는 사용되는 레이저광의 파장에서 80 % 이상의 반사율을 갖는 금속, 예를 들어 Au, Ag, Al, Cu 또는 이들의 합금을 포함한다. 이것은 가스상으로부터 침착법, 예를 들어 진공 증착, 스퍼터링, 이온 도금 또는 유사한 기술에 의해 도포될 수 있다.
보호층은 뚜렷한 내충격성을 갖는 수지, 일반적으로 에폭시 수지, 폴리아크릴레이트 수지 또는 경화된 실리콘 수지인 수지를 포함한다. 보호층은 일반적으로 스핀 코팅, 이어서 경화를 위한 UV 조사에 의해 수지의 침착으로 형성된다. 그러나, 이것은 또한 가요성 물질, 예를 들어 폴리우레탄 수지를 포함할 수 있다.
개별 층들의 층두께는 바람직하게는 0.5 내지 1.2 mm (지지체), 200 nm 이하 (기록층), 200 nm 이하 (반사층) 및 5 내지 200 nm (보호층)이다.
기록 및(또는) 판독용 레이저의 파장은 바람직하게는 760 내지 800 nm, 가장 바람직하게는 775 내지 785 nm, 또는 620 내지 660 nm, 가장 바람직하게는 635 내지 650 nm이다.
하기 실시예는 본 발명을 더 설명한다.
폴리카르보네이트의 상대 점도는 25 ℃에서 염화메틸렌 중의 폴리카르보네이트의 0.5 % 용액을 사용하여 측정하였다.
＜본 발명에 따른 실시예＞
하기 혼합물을 지지체 물질로 제조하였다.
99.6224 중량%의 과립 폴리카르보네이트, 마크롤론 (Makrolon) CD 2005 (Bayer AG 공급), tert-부틸페놀 말단기를 포함하고 평균 용액 점도가 1.20 (25 ℃에서 염화메틸렌 중에서 염화메틸렌 100 ㎖ 중의 0.5 g 농도에서 측정될 경우)인 비스페놀 A의 폴리카르보네이트,
0.0651 중량%의 피라졸론 염료 마크롤렉스겔브 3G (색상 지수, 파트 1, 솔벤트 옐로우 93) (Bayer AG),
0.19746 중량%의 안트라퀴논 염료 마크롤렉스로트 5B (색상 지수, 파트 1, 솔벤트 레드 52) (Bayer AG),
0.11501 중량%의 안트라퀴논 염료 하이텀 블루 E (색상 지수, 솔벤트 블루 101).
염료를 밀폐형 용기에서 과립형 물질와 완전히 혼합하고, 그후 혼합물을 약 240 ℃의 물질 온도에서 2축 워너 플라이더러(Werner Pfleiderer) 혼련기, 타입 ZSK 53에서 혼합하였다.
후속해서, 두께 1.2 mm 및 외경 120 mm의 CD-R 블랭크를 CD 사출 성형기에서 CD-R 스탬핑 기구를 사용하여 제조하였다. CD-R 제조는 330 ℃의 물질 온도 및 100 ℃의 성형 온도에서 10초의 사이클로 수행하였다. CD-R 스탬핑 기구는 평균 폭이 75 nm이고 평균 깊이가 180 nm이고 트랙 간격이 1.6 ㎛인 나선형으로 배치된 프리-홈을 가졌다.
CD-R 블랭크의 투과율을 측정하였다. 도 1은 물질이 700 nm 미만의 파장에서 높은 흡수율 (측정 기하학: 0o/확산)을 갖는다는 것을 보여준다.
＜비교예＞
비교용으로, 마크롤론 CD 2005 기질 물질에 염료를 첨가하지 않는다는 것을 제외하고는 유사한 CD-R 블랭크를 제조하였다. 도 2는 물질이 전가시광 영역에 걸쳐 높은 투과율 (측정 기하학: 0o/확산)을 갖는다는 것을 보여준다.
후속해서, 염료층을 CD-R 블랭크 위에 침착시켰다. 염료로서 시아닌 염료 OM57 (Fuji 공급)을 가야소브(Kayasorb) IRG-022 켄칭제 (Nippon Kayaku Co. 공급)와 배합하여 사용하였다. 염료 대 켄칭제의 비율은 20:1이었다. 염료/켄칭제 침착은 스핀 코팅으로 디아세톤 알콜 용액으로부터 수행하였고, 조건은 평균 염료층 두께 150 nm가 형성되도록 선택하였다.
후속해서, 두께 60 내지 80 nm의 Au층을 염료층으로 증발시켰다. 이 Au층에 다시 두께 약 10 ㎛의 보호 래커를 제공하였다.
그후, 본 발명 및 비교 시험에 의해 얻어진 CD-R은 4x의 기록/판독 비로 아마하 (Yamaha) CD-R 100 버너에서 기록되었다. CD-R의 블록 에러율(BLER)을 후속해서 ISEDD 시험 플레이어 (Philips and Sony 플레이어가 통합됨, Ingenieurbueros fuer Umwelttechnologie und Meβtechnik, Bielefeld)를 사용하여 측정하였다.
CD-R의 품질은 하기 표 1에 보여주는 바와 같이 비교할만한 수준이었다.
BLER (Sony) BLER (Philips)
본 발명에 따른 CD-R 60 59
기질 물질 중에 염료가 없는 CD-R 62 64
후속해서, 본 발명에 따른 CD-R 및 비교용 CD-R을 ISO 4892-2에 따라 노출 시험을 행하였다. 노출은 하기 시험 조건하에 기질 물질을 통하여 CD-R 염료층으로 수행하였다.
장치: 아틀라스 제논(Atlas Xenon)-WOM
광원: 6.5 kW 제논 램프 (Altas)
조사 세기: 340 nm에서 측정할 때 0.35 W/(㎡*nm)
여과: 파이렉스/파이렉스
블랙 표준 온도: 65 ℃
시험실 온도: 42 ℃
상대 분위기 습도: 65 %
분무 사이클: 102/18분
그후, 블록 에러율을 다시 ISEED 시험 플레이어를 사용하여 측정하였다.
비교용 CD-R는 약 10시간의 노출 시간후에도 BLER이 상당히 증가함을 보여주었다. 약 20시간의 노출 시간 후, BLER의 값은 약 500이었고, 즉 규격 밖이었다.
본 발명에 따른 CD-R은 실질적으로 50시간의 노출 시간까지 BLER이 증가하지 않음을 보여주었다.

Claims (10)

  1. 지지체층이 기록 및(또는) 판독용으로 사용되는 레이저의 파장에서 70 % 이상의 투과율을 가지며 레이저광의 파장 보다 100 nm 이상 더 짧은 가시광의 모든 다른 파장에서 70 % 이상의 흡수율을 갖는 1종 이상의 염료를 함유하는 것을 특징으로 하는, 보호층, 하나 이상의 기록층, 임의로 광반사층 및 하나 이상의 지지체층을 포함하는 기록성 광학 저장용 매체.
  2. 제1항에 있어서, 지지체층이 2종 이상의 염료를 함유하는 것을 특징으로 하는 광학 저장용 매체.
  3. 제1항 또는 제2항에 있어서, 투과율이 80 % 이상, 바람직하게는 85 % 이상이고 흡수율이 90 % 이상, 바람직하게는 95 % 이상인 것을 특징으로 하는 광학 저장용 매체.
  4. 제1항 내지 제3항 중 어느 한 항에 있어서, 기록 및(또는) 판독용 레이저의 파장이 760 내지 800 nm, 바람직하게는 775 내지 785 nm인 것을 특징으로 하는 광학 저장용 매체.
  5. 제1항 내지 제3항 중 어느 한 항에 있어서, 기록 및(또는) 판독용 레이저의 파장이 620 내지 660 nm, 바람직하게는 635 내지 650 nm인 것을 특징으로 하는 광학 저장용 매체.
  6. 제1항 내지 제5항 중 어느 한 항에 있어서, 염료 또는 염료들이 안트라퀴논 또는 피라졸론 염료를 포함하는 군으로부터 선택되는 것을 특징으로 하는 광학 저장용 매체.
  7. 제1항 내지 제6항 중 어느 한 항에 있어서, 염료 또는 염료들이 마크롤렉스겔브 3G (등록상표 Makrolexgelb 3G), 마크롤렉스로트 5B (등록상표 Makrolexrot 5B) 및 하이텀 블루 E (등록상표 Hytherm Blue E)로부터 선택되는 것을 특징으로 하는 광학 저장용 매체.
  8. 제1항 내지 제7항 중 어느 한 항에 있어서, 지지체층이 0.1 내지 1 중량%의 염료를 함유하는 것을 특징으로 하는 광학 저장용 매체.
  9. 제1항 내지 제8항 중 어느 한 항에 있어서, 단일 또는 다중 기록성 컴팩트 디스트의 형태인 광학 저장용 매체.
  10. 제9항에 있어서, 기록층이 상기 염료 또는 염료들과 상이한 민감성 염료로 구성되는 것을 특징으로 하는 광학 저장용 매체.
KR1020007003682A 1997-10-07 1998-09-24 광학 저장용 매체 KR20010024430A (ko)

Applications Claiming Priority (3)

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DE19744162A DE19744162A1 (de) 1997-10-07 1997-10-07 Optisches Speichermedium
DE19744162.9 1997-10-07
PCT/EP1998/006100 WO1999018571A1 (de) 1997-10-07 1998-09-24 Optisches speichermedium

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AU6508600A (en) * 1999-08-27 2001-03-26 Dow Chemical Company, The High data density optical media discs
US6944115B2 (en) 2000-09-29 2005-09-13 General Electric Company Colored data storage media
US20030112737A1 (en) * 2001-06-05 2003-06-19 Thompson Robert F. Limited play optical devices with interstitial reactive layer and methods of making same
DE10151847A1 (de) 2001-10-24 2003-05-08 Bayer Ag Laserabsorbierende russarme Formmassen
EP2063423A1 (en) * 2007-11-15 2009-05-27 Deutsche Thomson OHG Shift-insensitive storage of information in page oriented optical data storage systems
US8343608B2 (en) * 2010-08-31 2013-01-01 General Electric Company Use of appended dyes in optical data storage media
CN112002782B (zh) * 2020-08-28 2022-03-01 河南师范大学 一种基于MnBi2Te4单层的纳米尺度光电传感器

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JPS6439647A (en) * 1987-08-05 1989-02-09 Sanyo Electric Co Optical recording disk
JPH0341640A (ja) * 1989-07-10 1991-02-22 Sanyo Electric Co Ltd 光記録媒体
JPH0461640A (ja) * 1990-06-27 1992-02-27 Victor Co Of Japan Ltd 追記型光ディスク
JP3020745B2 (ja) * 1992-08-06 2000-03-15 帝人化成株式会社 光学的記録材料及び光学的記録基板
US5648197A (en) * 1995-01-31 1997-07-15 Victor Company Of Japan, Ltd. Optical disk
JPH0954980A (ja) * 1995-08-08 1997-02-25 Mitsui Toatsu Chem Inc 光記録媒体

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NO20001746D0 (no) 2000-04-05
CA2305147A1 (en) 1999-04-15
NO20001746L (no) 2000-04-05
EP1023724A1 (de) 2000-08-02
IL134872A0 (en) 2001-05-20
BR9812868A (pt) 2000-08-08
CN1273666A (zh) 2000-11-15
AU1026699A (en) 1999-04-27

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