SE512109C2 - Disc-shaped, optically readable information carrier - Google Patents

Disc-shaped, optically readable information carrier

Info

Publication number
SE512109C2
SE512109C2 SE9801644A SE9801644A SE512109C2 SE 512109 C2 SE512109 C2 SE 512109C2 SE 9801644 A SE9801644 A SE 9801644A SE 9801644 A SE9801644 A SE 9801644A SE 512109 C2 SE512109 C2 SE 512109C2
Authority
SE
Sweden
Prior art keywords
information carrier
disc
shaped
optically readable
elevations
Prior art date
Application number
SE9801644A
Other languages
Swedish (sv)
Other versions
SE9801644L (en
SE9801644D0 (en
Inventor
Jarmo Naeppi
Ulf Zettergren
Original Assignee
Toolex Alpha Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toolex Alpha Ab filed Critical Toolex Alpha Ab
Priority to SE9801644A priority Critical patent/SE512109C2/en
Publication of SE9801644D0 publication Critical patent/SE9801644D0/en
Priority to EP99927051A priority patent/EP1086454A1/en
Priority to AU44042/99A priority patent/AU4404299A/en
Priority to PCT/SE1999/000796 priority patent/WO1999062060A1/en
Publication of SE9801644L publication Critical patent/SE9801644L/en
Publication of SE512109C2 publication Critical patent/SE512109C2/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Abstract

The invention relates to a disc-shaped, optically readable information carrier (10) made of plastic material. The disc (10) has a distance member (16) projecting from one side in the form of at least three point-shaped raised portions distributed uniformly in the circumferential direction.

Description

v- <1 nllnll i r *v n Wi 10 15 20 25 51.2 109 2 Ytterligare särdrag hos den skivformade, optiskt läsbara informationsbäraren enligt uppfinningen är angivna i de efterföljande osjälvständiga patentkraven. v- <1 nllnll i r * v n Wi 10 15 20 25 51.2 109 2 Additional features of the disk-shaped, optically readable information carrier according to the invention are set forth in the appended dependent claims.

Uppfinníngen beskrives närmare nedan under hänvisning till bifogade ritning, på vilken: fig. 1 är en planvy av en CD-skiva försedd med punktformiga upphöjningar i enlighet med föreliggande uppfinning; och fig. 2 är en förstorad tvärsektionsvy tagen längs linjen II-ll i fig. 1 och visande en ytterligare delförstoring av en upphöjning på skivelementet.The invention is described in more detail below with reference to the accompanying drawing, in which: fi g. 1 is a plan view of a CD provided with point elevations in accordance with the present invention; and fi g. 2 is an enlarged cross-sectional view taken along line II-II in fi g. 1 and showing a further partial enlargement of an elevation on the disc element.

Ifig. 1 visas en optiskt läsbar, skivformad informationsbärare 10, såsom en s.k. kompaktslciva eller CD. Skivan 10 är på känt sätt formsprutad i ett plastmaterial, exempelvis polykarbonat, och försedd med en informationsinnehållande mikro- strukturering på dess ena sida 12. På skivans 10 motsatta sida 14 är utformade ett litet antal diskreta, punktformiga upphöjningar 16, i det visade utförandet 6 stycken, likformigt fördelade i omkretsrikmingen. Upphöjningarna 16 är placerade koncent- riskt med skivans 10 centrumhål 18 och belägna radiellt innanför det milcrostruktu- rerade området av skivan. Dessa upphöjningar 16 utgör primärt distanselement för att hålla nypressade, staplade CD-skivor något åtskilda för att därigenom förhindra att skivoma suges fast i varandra, då de skall lyftas bort individuellt från stapeln.I fi g. 1 shows an optically readable, disc-shaped information carrier 10, such as a so-called compact disc or CD. The disc 10 is injection molded in a known manner into a plastic material, for example polycarbonate, and provided with an information-containing microstructure on its one side 12. On the opposite side 14 of the disc 10 a small number of discrete, point-shaped elevations 16 are formed, in the embodiment shown 6 pieces, uniformly distributed in the circumferential arm. The ridges 16 are located concentrically with the center hole 18 of the disc 10 and located radially within the milcrostructured area of the disc. These bumps 16 are primarily spacers for keeping freshly pressed, stacked CDs slightly apart to thereby prevent the discs from being sucked into each other when they are to be lifted away individually from the stack.

De punktformiga upphöjningarria 16 är lämpligen 6 till antalet, men kan vara några färre (minst tre) eller några fler. Såsom visas i det delförstorade området av fig. 2, kan upphöjningen 16 lämpligen ha formen av en stympad kon, vars basdiameter kan uppgå till cirka 0,8 mm, toppdiameter till cirka 0,4 mm och höjd till cirka 0,2 mm.The point-shaped elevation rows 16 are suitably 6 in number, but may be a few less (at least three) or a few fls. As shown in the partially enlarged area of fi g. 2, the elevation 16 may suitably be in the form of a truncated cone, the base diameter of which may amount to about 0.8 mm, the top diameter to about 0.4 mm and the height to about 0.2 mm.

Det har visat sig, att man kunnat eliminera krymp- och spänningsfenomen som tidigare uppkommit i samband med en kontinuerlig ringformig upphöjning som distanselement och som inverkat negativt på den färdiga skivans optiska egenskaper och i viss mån på dess utseende.It has been found that it has been possible to eliminate shrinkage and stress phenomena which have previously arisen in connection with a continuous annular elevation as a spacer element and which have had a negative effect on the optical properties of the finished disc and to some extent on its appearance.

Claims (5)

10 15 20 (TT -_\ PO .à (3 \O 3 Patentkrav10 15 20 (TT -_ \ PO .à (3 \ O 3 Patentkrav 1. Skivformad, optiskt läsbar informationsbärare av plastmaterial, vars ena sida (12) uppvisar en infonnationsinnehållande rnilcostrukturering, och vars andra sida (14) har ett från sidans plan utskjutande distansorgan (16), beläget radiellt innanför mikrostruktureringen, kännetecknad av att distansorganet (16) har formen av minst tre i omkretsiikmingen likfonnigt fördelade, punktformiga upphöjningar.Disc-shaped, optically readable information carrier of plastic material, one side (12) of which contains an information-containing structure, and the other side (14) of which has a spacer projecting radially (16) projecting radially inside the microstructure, characterized in that the spacer (16 ) has the form of at least three point-shaped elevations evenly distributed in the circumference. 2. lnformationsbärare enligt krav 1, kännetecknad av att upphöjningaina (16) var och en har formen av en stympad, cirkulärcylindrisk kon.Information carrier according to Claim 1, characterized in that the elevations (16) are each in the form of a truncated, circular-cylindrical cone. 3. Informationsbärare enligt krav 1 eller 2, kännetecknad av att upphöjningania (16) är 3-12 till antalet, företrädesvis cirka 6 stycken.Information carrier according to claim 1 or 2, characterized in that the elevations (16) are 3-12 in number, preferably about 6 pieces. 4. Informationsbärare enligt krav 2 eller 3, kännetecknad av att basen av konen har en diameter av cirka 0,8 mm, medan den plana toppytan har en diameter av cirka 0,4 mm.Information carrier according to claim 2 or 3, characterized in that the base of the cone has a diameter of about 0.8 mm, while the flat top surface has a diameter of about 0.4 mm. 5. lnformaüonsbärare enligt något av kraven 1-4, kännetecknad av att höjden av upphöjningarna är cirka 0,2 mm.Information carrier according to one of Claims 1 to 4, characterized in that the height of the elevations is approximately 0.2 mm.
SE9801644A 1998-05-12 1998-05-12 Disc-shaped, optically readable information carrier SE512109C2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9801644A SE512109C2 (en) 1998-05-12 1998-05-12 Disc-shaped, optically readable information carrier
EP99927051A EP1086454A1 (en) 1998-05-12 1999-05-11 Disc-shaped, optically readable information carrier
AU44042/99A AU4404299A (en) 1998-05-12 1999-05-11 Disc-shaped, optically readable information carrier
PCT/SE1999/000796 WO1999062060A1 (en) 1998-05-12 1999-05-11 Disc-shaped, optically readable information carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9801644A SE512109C2 (en) 1998-05-12 1998-05-12 Disc-shaped, optically readable information carrier

Publications (3)

Publication Number Publication Date
SE9801644D0 SE9801644D0 (en) 1998-05-12
SE9801644L SE9801644L (en) 1999-11-13
SE512109C2 true SE512109C2 (en) 2000-01-24

Family

ID=20411264

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9801644A SE512109C2 (en) 1998-05-12 1998-05-12 Disc-shaped, optically readable information carrier

Country Status (4)

Country Link
EP (1) EP1086454A1 (en)
AU (1) AU4404299A (en)
SE (1) SE512109C2 (en)
WO (1) WO1999062060A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8623486B2 (en) 2009-06-23 2014-01-07 Thomson Licensing Hybrid disc, method and system of forming the disc
WO2010151309A1 (en) 2009-06-23 2010-12-29 Thomson Licensing Data disc, method and system of forming the disc

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2973155B2 (en) * 1993-10-29 1999-11-08 株式会社名機製作所 Disk substrate and molding die used for molding the disk substrate
JPH09180251A (en) * 1995-12-22 1997-07-11 Pioneer Electron Corp Disk substrate, metal mold for molding the same, and optical disk

Also Published As

Publication number Publication date
AU4404299A (en) 1999-12-13
SE9801644L (en) 1999-11-13
WO1999062060A1 (en) 1999-12-02
SE9801644D0 (en) 1998-05-12
EP1086454A1 (en) 2001-03-28

Similar Documents

Publication Publication Date Title
CN101426638B (en) Molding of optical elements using a tool having an overflow volume
DE3769752D1 (en) SOLID POLYMERIC SUBSTRATE FOR OPTICAL DISC AND OPTICAL DISC, MADE FROM THIS SUBSTRATE.
AU1127388A (en) Continuous-wear lenses having improved physical properties
DE602005024967D1 (en) BAND DISCS nucleus pulposus IMPLANT
AU2002300442B2 (en) Method and Apparatus for Reducing the Shrinkage of an Optical Disc&#39;s Clamp Area, and the Resulting Optical Disc
US4316281A (en) Spacer for stacked recorded discs
SE9500791D0 (en) Pile of separator discs for centrifugal separator
KR20090092781A (en) Molds for use in contact lens production
ATE276452T1 (en) FRICTION PAD
US6473247B1 (en) Optical lens support and method for using same
SE512109C2 (en) Disc-shaped, optically readable information carrier
GB1418622A (en) Game having a flat surface and pucks slidable thereon
CN100511631C (en) Wafer storage container
AU637176B2 (en) Chip for gaming table
Meyer et al. Morphological variation of Cyclotella polymorpha sp. nov.(Bacillariophyceae)
EP0368006A3 (en) Copolymers containing polybenzoxazole polybenzothiazole and polybenzimidazole moieties
RU2007105145A (en) CONTAINER FOR A DIGITAL RECORDING MEDIA HAVING A DISC FORM
US4062147A (en) Horticultural container assembly with saucer drainage and ventilation passage
US5741131A (en) Stacking system for substrates
US2536922A (en) Plastic centering disk for phonograph records
DE20212355U1 (en) saucer
KR100728402B1 (en) Method of and device for determining the warpage of a wafer
ES2165088T3 (en) SUBMERSIBLE DISK MILK.
KR910013168A (en) Disc record players and centering devices for players
CN218507945U (en) Monolithic graphite plate for improving thickness uniformity of silicon wafer

Legal Events

Date Code Title Description
NUG Patent has lapsed