TWI231935B - Optical disc - Google Patents

Optical disc Download PDF

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Publication number
TWI231935B
TWI231935B TW090120614A TW90120614A TWI231935B TW I231935 B TWI231935 B TW I231935B TW 090120614 A TW090120614 A TW 090120614A TW 90120614 A TW90120614 A TW 90120614A TW I231935 B TWI231935 B TW I231935B
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TW
Taiwan
Prior art keywords
layer
optical disc
moisture
comprehensive
readable information
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TW090120614A
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English (en)
Inventor
Der Tempel Leendetr Van
Original Assignee
Koninkl Philips Electronics Nv
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/24018Laminated discs
    • G11B7/24027Layers; Shape, structure or physical properties thereof
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403Layers; Shape, structure or physical properties thereof
    • G11B7/24047Substrates
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1446Reducing contamination, e.g. by dust, debris
    • G11B33/1453Reducing contamination, e.g. by dust, debris by moisture
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B2007/25303Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537Optical discs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/21Circular sheet or circular blank

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

1231935 五、發明説明(1 本發明關於-含綜合樹脂基體,基體備有可讀資訊之光 碟’ 層及第二綜合樹脂層,該防濕層位於綜合樹脂基 體與第二綜合樹脂層之間。 此種光碟曾以特殊型式揭示於美國專利規格5,49〇,131與 6,051,298中碟月(以下稱⑶)及一數位視頻碟片(以下 稱DVD)為光碟之舉例,其被認為係—般光學資訊媒體。可 商購之光碟包含—綜合樹脂基體,其備有連續洞以儲存資 訊,-反射薄膜蓋住碟片之基體之洞,反射薄膜上設有保護 性薄膜,該反射薄膜可認為係—防濕層。特別是,一CD實 際上係-約0.05微米厚之反射層蓋住約12_厚度碟片中之 洞,保護性薄膜備於反射薄膜上,厚度約為1()微米…雙面 資訊系統之DVD含-碟形基體,其中之資訊儲存於槽中,並 被反射薄膜蓋住,薄膜上在某實施例中,備有保護性薄膜:、 此種DVD係將二碟片置於另一碟片之上,二碟片彼此在保護 性薄膜之一面以一黏膠層黏合。在另一DVD實施例中,有一 資訊及反射層。 製造光碟之方法本身已甚知名,其利用某些程序如壓縮, 注入,感光聚合物化等,此碟形基體係由聚碳酸酯製成。蓋 住碟形體中之洞防濕層,係由直空蒸氣或潑濺構成,通常為 鋁所製成。作為保護薄膜之第二綜合樹脂層,係以層形式加 在鋁防濕層上,以便保護鋁薄膜不受由於實際接觸或薄模氧 化引起之損壞。此保護層係由旋轉塗層方式製備,樹脂材料 經由旋轉運動而施加。此種光碟通常用於濕度常變化之大氣 環丨兄中。因此,四周空氣中存在水蒸氣或濕氣,可穿入相當 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公 4- 2 1231935 五、發明説明( 乾之綜合樹脂基體,由於濕度在週圍大氣中起伏,並自基體 擴散直到均衡狀態達成。由於防濕層之存在,濕氣自保護薄 膜側進入綜合樹脂基體,甚為不易。或者,濕氣可僅自基體 之另一側穿入或吸收,如為CD型光碟時,光入射基體之一 側。如為數位視頻可錄(digital video fecordabk,DVRj 型光碟,第二綜合樹脂層為光入射之一側,上述情形則為另 一情形。濕氣之吸收及退吸收引起水濃度之不同,因此造成 基體體積改變差異,此差異造成基體之彎曲。在一含綜合樹 脂基體之光碟實施例中,備有-㈣角之基體係位於與光入 測之光軸成傾斜位置。結果,光線將不沿槽之中心前進,即
使在伺服機構作業時亦然,導致信號質量退化。如基體進一P 步彎曲時,伺服機構已不適合,因而使碟片暫時不用。 故光碟受到需求以外之彎曲時,使徑向角暫時無法讀取。 本發明之目的為提供-光4,其在濕氣影響下可展示無 曲或少許彎曲。 本發明如首段所提,根據本發明,其特徵為光碟中防濕層 之位置,可應用以下之公式: θ 0.1 4<0<〇·49 其中 0=第二綜合樹脂層(mm)/光碟總厚度(历瓜) 應注意,首段使用之,,防濕層”之意義為,其不僅含一單— 層,且含該層之堆疊層,例如金屬,ZnS_Si〇2,相改變 及znS-si〇2。在首段中,此種堆壘或層包應考慮為防濕層。 此外,在某實施例中’光碟可能含二可讀取層,由二墊 本紙張尺度適财關家標準(〗NS) A4規格(21G χ 5- 1231935 A7
1231935 A7 __________B7 五、發明説明(4 ) 僅限於申請專利範圍内之保護範圍。 此較例】 一可商購之CD含1.2 mm厚之聚碳酸酯基體,備於資訊層 之一側,一 0.05微米之鋁反射層及一約1〇微米厚之樹脂層作 為綜合樹脂層,加以檢驗其濕氣之影響。在其被儲存於特定 濕氣之空間一長時間後,此時間加以選擇,以使光碟中之空 氣濕度到達均衡之集中,光碟隨後轉移至一不同濕度之空 間而‘致光碟之彎曲,之後最大彎曲以時間為函數,予以 測S。最大時間相關之曲率角為〇·29〇。0值為〇 。 比較例2 欠DVR型光碟,其含約1;1 mm厚之聚碳酸醋基體,備於 一資'訊層上,該資訊層以〇_〇5微米厚之反射層塗層,該層. 備有0.1mm厚聚碳酸脂之第二綜合樹脂層,此光碟以比較例 1之同一條件受到濕氣試驗。在相對濕氣步驟後,dvr型光 碟展現約0.1 5。彎曲。0值為約〇〇8 3。 例1 、DVR型光碟如比較例2所用者,但第二綜合樹脂層厚度 改為至0.25 mm。此光碟受到比較例2之同一濕氣試 驗,接叉相對濕度步驟後,測量之最大時間依存之彎曲為 〇°。0 值為0.185。 例2 一DVR型光碟,與比較例2所用者相同,其製造僅由厚度 1.1 mm聚碳酸酯改成厚度〇.4 mm。此Dvr光碟受到與2 較例2相同條件之可變濕度,時間相關之宵曲測量結果顯示 本紙張尺度適财關家料(CNS)A视格(2夢297公幻 1231935 A7 -—- __ B7 五、發明説明(5 ) 並無貫際之、考曲發生。0值為約〇. 2 〇。 圖式簡單說明 圖1所示為參數0與絕對最大集中力矩(CM)之關係;以及 圖2所示為當0 = 〇 · 2時,集中力矩與時間之關係。 圖式元件符號說明 θ 第二綜合樹脂層(mm) /光碟總厚度(mm) CM 集中力矩 T 時間 -8- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)

Claims (1)

1231935 A B c D ' ----- 六、申請專利範圍 •種光碟:包括備有可讀取資訊之綜合樹脂基體,一防濕 曰第一、、、’τ> σ秘脂層,該防濕層位於綜合樹脂基體與第二 綜合樹脂層之間,其中該防濕層包含具有多於一層:堆疊 層,及其中光碟中防濕層之位置適於下列公式: 〇.14<0<〇.49 其中: 0=第二綜合樹脂層之厚度(mm)/光碟總厚度( mm)。 2·如申請專利範圍第!項之光碟,其中該防濕層包含銘。 3 ·如:明專利範圍第!項之光碟,其中該基體包含兩層可讀 取駟Λ層,且δ亥等可讀取資訊層係由一分隔物所隔開。 4· 一種光碟’包含備有可讀取資訊之綜合樹脂基體,一防濕 層及一第二綜合樹脂層,防濕層位於綜合樹脂基體與第二 V、合树月曰層之間,其中於不同濕度位準下所測量之與時間 相依之彎曲,其最大及最小之彎曲絕對值,可合乎以下公 式: 其中: |Kniinh最小彎曲之絕對值,及 1尺_|=最大彎曲之絕對值。 5·如申請專利範圍第4項之光碟,其特徵為: fell« 1 〇 |尺贏| 6. —種光碟,包括備有可讀取資訊之綜合樹脂基體,一防濕 層及第二綜合樹脂層,該防濕層位於綜合樹脂基體與第二 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 1231935
综合樹脂層之間,其中光碟中防濕層之位置適於下列公式: 〇. 1 6<0<〇·33 其中: 0第一练合樹脂層之厚度(mm)/光碟總厚度(㈤瓜)。 7·如申π專利粑圍第6項之光碟,其中該防濕層包含銘。 8.如申請專利範圍第6項之光碟,其中該基體包含兩層可讀 取資訊層,且該等可讀取資訊層係由一分隔物所隔開。 9·如申請專利範圍第6項之光碟,其中0岣.2。 10·-種光碟’包括備有可讀取資訊之綜合樹脂基體,一防濕 層及第二綜合樹脂層,W方濕層位於綜合樹脂基體與第= 綜,樹脂層之間,其中該基體包含兩層可讀取資訊層,: 該等可讀取資訊層係由一分隔物所隔開,及其中該光碟 之防濕層之位置適於下列公式: /、 〇.14<0<〇.49 其中: 0=第二綜合樹脂層之厚度(mm)/光碟總厚度(讲历)。 -2 -
TW090120614A 2000-09-21 2001-08-22 Optical disc TWI231935B (en)

Applications Claiming Priority (1)

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EP00203310 2000-09-21

Publications (1)

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TWI231935B true TWI231935B (en) 2005-05-01

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Country Status (7)

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US (1) US6596367B2 (zh)
EP (1) EP1323159A1 (zh)
JP (1) JP2004510282A (zh)
KR (1) KR100830947B1 (zh)
CN (1) CN1227657C (zh)
TW (1) TWI231935B (zh)
WO (1) WO2002025647A1 (zh)

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US6972143B2 (en) * 2003-10-27 2005-12-06 Kyle Baldwin Protective U.V. curable cover layer for optical media
US6967049B1 (en) * 2004-05-28 2005-11-22 Tdk Corporation Optical recording medium
JP2006031811A (ja) * 2004-07-15 2006-02-02 Tdk Corp Rom型光記録媒体
JP2006277828A (ja) * 2005-03-29 2006-10-12 Tdk Corp 光記録媒体
US7906194B2 (en) * 2005-03-31 2011-03-15 Cinram International Inc. Optical disc with textured edge
JP6056402B2 (ja) * 2012-11-15 2017-01-11 ソニー株式会社 光記録媒体用基板の製造方法

Family Cites Families (7)

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JPH08203126A (ja) * 1995-01-27 1996-08-09 Nec Corp 光学的情報記録媒体ならびに光学的情報再生方法および 光学的情報記録再生消去方法
JPH08221802A (ja) * 1995-02-10 1996-08-30 Victor Co Of Japan Ltd 光ディスク
JP3241560B2 (ja) * 1995-02-24 2001-12-25 ソニー株式会社 光学記録媒体及びその製造方法
JPH10326435A (ja) * 1997-03-25 1998-12-08 Sony Corp 光学記録媒体及び光学ディスク装置
US6124011A (en) * 1998-09-03 2000-09-26 Wea Manufacturing, Inc. Information-bearing discs and methods of fabrication
KR20010075534A (ko) * 1999-08-31 2001-08-09 니시무로 타이죠 광디스크와 이 광디스크로부터 데이터를 재생하는 방법 및장치
US6436503B1 (en) * 1999-09-08 2002-08-20 General Electric Company Data storage medium containing polyestercarbonate

Also Published As

Publication number Publication date
KR20020062645A (ko) 2002-07-26
WO2002025647A1 (en) 2002-03-28
CN1393015A (zh) 2003-01-22
JP2004510282A (ja) 2004-04-02
US20020048647A1 (en) 2002-04-25
EP1323159A1 (en) 2003-07-02
CN1227657C (zh) 2005-11-16
KR100830947B1 (ko) 2008-05-20
US6596367B2 (en) 2003-07-22

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