A data disc, method and apparatus for forming the disc are disclosed. The data disc includes a first substrate structure bonded to a second substrate structure, with two curable material layers disposed on different sides of at least one of the two substrate structures, and at least one groove formed on a surface of one of the two curable material layers.

Claims

22 · 3 independent · depth 4

22 granted claims

›1.independentA method for forming a data disc having a first substrate structure and a second substrate structure, the first substrate structure having a data laye…+12

›2.↳ 1The method of claim 1, wherein the at least one groove is formed by:nproviding at least one gas jet over the second curable material layer;rotating th…d2

›3.↳ 1The method of claim 1, wherein the at least one groove includes at least one of: a continuous spiral groove, a plurality of concentric circular groove…d2+3

›7.↳ 1The method of claim 1, further comprising:nforming the at least one groove at a radial distance in a range of about 15 mm to about 60 mm from a center…d2

›8.↳ 1The method of claim 1, further comprising:nforming the at least one groove with a width in a range of about 0.8 mm to about 1.2 mm.d2

›9.↳ 1The method of claim 1, further comprising:nforming the at least one groove with a depth of at least 4 μm.d2

›10.↳ 1The method of claim 1, further comprising:ndirecting the at least one gas jet at an angle in a range of about 45 degrees to about 90 degrees with resp…d2

›11.↳ 1The method of claim 1, wherein the first and second curable materials each has a property that results in respective first and second amounts of shrin…d2

›12.↳ 1The method of claim 1, further comprising:nforming a third curable material layer over the second curable material layer, andforming a layer of materi…d2+1

›14.independentThe method of any of the preceding claims, wherein the data layer of the first substrate structure has a Blu-ray disc (BD) format, and the data layer …

›15.independentA data disc comprising:na first substrate structure bonded to a second substrate structure, the first substrate structure having a data layer with a f…+7

›16.↳ 15The disc of claim 15, wherein the at least one groove includes at least one of: a continuous spiral groove, a plurality of concentric circular grooves…d2

›17.↳ 15The disc of claim 15, wherein the at least one groove is provided at a radial distance in a range of about 15 mm to about 60 mm from a center of the f…d2

›18.↳ 15The disc of claim 15, wherein the at least one groove is provided at a radial distance in a range of about 20 mm to about 55 mm from a center of the f…d2

›19.↳ 15The disc of claim 15, wherein the at least one groove has a width between about 0.8 mm to about 1.2 mm.d2

›20.↳ 15The disc of claim 15, wherein the at least one groove has a depth of at least 4 μm.d2

›21.↳ 15The disc of claim 15, further comprising at least a third curable material layer over the second curable material layer, and a layer of material selec…d2

›22.↳ 15The disc of claim 15, wherein the data layer of the first substrate structure has a Blu-ray disc (BD) format, and the data layer of the second substra…d2

Classifications

4 codes

IPC · International Patent Classification

Section G — Physics

G11B7/24

USPC · US Patent Classification

428/64.1430/270.11428/64.4

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Pendency

3.7 y

1,365 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Elizabeth Mulvaney

art unit 1785 · TC 1700

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Citations: 39 back · 0 forward

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Priority chain

2 priority documents

Priority

23 Jun 2009

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 61269342	23 Jun 2009
related publication	US 20120141718 A1	7 Jun 2012

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