Optical data storage medium and use of such medium
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G11B-007/24
G11B-007/0045
G11B-007/005
G11B-007/007
출원번호
US-0517917
(2003-06-13)
등록번호
US-9324356
(2016-04-26)
우선권정보
EP-02077448 (2002-06-18)
국제출원번호
PCT/IB03/02832
(2003-06-13)
§371/§102 date
20041214
(20041214)
국제공개번호
WO03/107334
(2003-12-24)
발명자
/ 주소
Martens, Hubert Cécile François
Van Den Oetelaar, Ronald Joseph Antonius
출원인 / 주소
Koninklijke Philips N.V.
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
A multi-stack optical data storage medium (30) for recording and reading using a focused radiation beam (40) entering through an entrance face (41) of the medium (30) is described. It has a first substrate (31a) with present on a side thereof a first recording stack (33) named L0, comprising a recor
A multi-stack optical data storage medium (30) for recording and reading using a focused radiation beam (40) entering through an entrance face (41) of the medium (30) is described. It has a first substrate (31a) with present on a side thereof a first recording stack (33) named L0, comprising a recordable type L0 recording layer (35), formed in a first L0 guide groove (38a, 38b). A first reflective layer (39) is present between the first L0 recording layer (35) and the first substrate (31a). A second substrate (31b) with present on a side thereof a second recording stack (32) named L1 is present at a position closer to the entrance face (41) than the L0 recording stack (33) and formed in a second L1 guide groove (37). A transparent spacer layer (36) is sandwiched between the recording stacks (32, 33). The first L0 guide groove (38a, 38b) has a depth GL0100 nm. In this way a relatively high reflection value of the L0 stack is achieved at a radiation beam wavelength of approximately 655 nm.
대표청구항▼
1. A multi-stack optical data storage medium for recording and reading using a focused radiation beam having a wavelength of 655 nm entering through an entrance face of the medium during recording and reading, comprising: a first substrate having, on a side thereof, a first recording stack L0 compri
1. A multi-stack optical data storage medium for recording and reading using a focused radiation beam having a wavelength of 655 nm entering through an entrance face of the medium during recording and reading, comprising: a first substrate having, on a side thereof, a first recording stack L0 comprising a recordable type L0 recording layer comprising a dye, and formed in a first L0 guide groove, and a first reflective layer present between the L0 recording layer and the first substrate;a second substrate having, on a side thereof, a second recording stack L1 comprising a recordable type L1 recording layer, said second recording stack L1 being at a position closer to the entrance face than the first recording stack L0 and formed in a second L1 guide groove;a transparent spacer layer sandwiched between the first and second recording stacks; anda dielectric layer present at a side of the L0 recording layer opposite from the side where the first reflective layer is present,wherein the dielectric layer has a thickness in the range of 5 nm to 14 nm. 2. The multi-stack optical data storage medium as claimed in claim 1, wherein said multi-stack optical data storage medium further comprises a second reflective layer comprising a metal present at a side of the L0 recording layer opposite from the side where the first reflective layer is present. 3. The multi-stack optical data storage medium as claimed in claim 2, wherein the second reflective layer has a thickness in the range of 5 nm-15 nm. 4. The multi-stack optical data storage medium as claimed in claim 2, wherein the metal is selected from the group of Ag, Au, Cu, Al. 5. The multi-stack optical data storage medium as claimed in claim 1, wherein the effective reflection level of the stacks is at least 0.18 at a radiation beam wavelength of approximately 655 nm. 6. The multi-stack optical data storage medium of claim 1, wherein the multi-stack optical data storage medium has a modulation M of 75% and a reflection level of 70%, and wherein the modulation is M=(Rno-mark−Rmark)/Rno-mark, Rmark and Rno-mark being reflection levels from a read out laser beam when respectively a written mark and no mark are present. 7. The multi-stack optical data storage medium of claim 1, wherein a thickness of the spacer layer is between 40 μm to 70 μm. 8. The multi-stack optical data storage medium of claim 1, further comprising a third recording stack formed over the second recording stack L1, wherein the third recording stack includes a third guide groove in the first substrate, the third guide groove having a thickness from 25 nm to 40 nm, a dye layer formed over the third guide groove and having a thickness from 90 nm to 160 nm, and a third reflective layer formed over the dye layer and having a thickness of 100 nm. 9. A multi-stack optical data storage medium for recording and reading using a focused radiation beam having a wavelength of 655 nm entering through an entrance face of the medium during recording and reading, comprising: a first substrate having, on a side thereof, a first recording stack L0 comprising a recordable type L0 recording layer comprising a dye, and formed in a first L0 guide groove, and a first reflective layer present between the L0 recording layer and the first substrate, wherein the first L0 guide groove has a width of 500
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