WO2001018799A1 - Multilayered optical disk - Google Patents

Multilayered optical disk Download PDF

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Publication number
WO2001018799A1
WO2001018799A1 PCT/JP2000/005952 JP0005952W WO0118799A1 WO 2001018799 A1 WO2001018799 A1 WO 2001018799A1 JP 0005952 W JP0005952 W JP 0005952W WO 0118799 A1 WO0118799 A1 WO 0118799A1
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WO
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Patent type
Prior art keywords
layer
recording
area
information
address
Prior art date
Application number
PCT/JP2000/005952
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French (fr)
Japanese (ja)
Inventor
Mamoru Shoji
Atsushi Nakamura
Takashi Ishida
Hironori Deguchi
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Matsushita Electric Industrial Co., Ltd.
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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
    • G11B7/007Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00745Sectoring or header formats within a track
    • 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
    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005Reproducing

Abstract

A multilayered optical disk having a plurality of information recording layers having the same reading-light incident surface, at least one information recording layer being capable of optically recording, wherein, a mirror-region taking-up proportion layer in the vicinity of an uneven address block than in a data region increases reflectance. Therefore, when a proportion occupied by an address region in a light spot to be shone on a layer other than a reproduction layer is large when data is to be reproduced, local variations occur in a reproduction signal to make it impossible to reproduce data correctly. The provision of a dummy groove or uneven pit row in the vicinity of an address block can reduce a mirror region in the vicinity of the address block and lower reflectance to thereby reduce local variations caused by an address region.

Description

Specification

Multi-layer optical disc technology field

The present invention includes a plurality of information recording layers incident surface of the reading light are the same, one layer of which also small relates recordable multilayer optical disc optically. BACKGROUND

Recently recordable optical disk is actively developed as a means for recording a large amount of data is performed, in order to achieve higher recording density, a narrow track pitch and, the linear density by recording a mark more have short improvement and, groove-like group tracks and both land group recording for performing recording on various Apuro over switch of the land track of inter-groove have been made. Although it could not be recorded and reproduced only for 1 layer recording layer from the laser light entrance surface prior already capable of reproducing two-layer information recording layer from the same laser light entrance surface in the reproduction-only multilayer optical disc multilayer optical disc has been developed, the development is expected in the recordable multilayer optical disk.

However it takes a management sector units for recording and reproducing data in a recordable multilayer optical disk, at the time of disc manufacturing, to form a guide groove for tracking control, address information of the sector is often formed as a pit . For thus la command tracks and multilayer optical disk capable of recording in both groups track, it is necessary to provide a sector address for identifying the sector land track, both the group track.

It shows a conventional multilayer optical disc in Fig. The multilayer optical disk 9 1, groove-like glue Butorakku 9 3, land track 9 2 between the grooves is provided. Recording of information is performed with respect to the track of the double side, one round of track is divided into one or more Adoresu region 9 4 and the data area 9 5.

Referring now to Figure 1 0. Figure 1 0 is an illustration of Ri in detail by the Adoresu region 9 4 of the multilayer optical disk 9 1. Address block 1 0 0 1 in 1 0 For example a groove track 9 3 a, 1 0 0 2 is provided, the address blocks 1 0 0 3 1 0 0 4 is provided on a land track 9 2 a ing. The address blocks adjacent Randoto rack, the address block Diagnostics slave tracks, since the shift position of the track direction has the effect of cross-talk caused stiffness difficult when reproducing the Adoresu information. Disclosure of the Invention

(Technical problem to be Solved by the Invention)

Figure 1 1 is a cross-sectional view of a conventional recordable dual-layer optical disc. In Figure 1 1, 1 1 0 1 and 1 1 0 2 transparent substrate such as poly force one Bonnet one preparative, 1 1 0 3 serial of the first layer, 1 1 0 4 incident than 1 1 0 1 translucent reflective film that transmits or reflects laser light, 1 1 0 5 second-layer recording layer, 1 1 0 6 1 1 0 1 than Les incident - reflective film which reflects the first light, 1 1 0 7 is an adhesive having a property of the light ^ Y is for causing Awa bonding the substrate 1 1 0 1 and the substrate 1 1 0 2.

Since the configuration shown in FIG. 1 1, for example, when reproducing the second layer recording film 1 1 0 5 The signal recorded in the, in the recording film 1 1 0 3 part of the laser beam first layer It is reflected and focused to off Otoditekuta. Similarly, when reproducing the signal recorded on the first layer of the recording film 1 1 0 3 also, a second layer portion of the laser light is transmitted through the recording film 1 1 0 3 of the first layer reflected by the recording film 1 1 0 5 eye is focused on the photodetector passes through the first layer recording film 1 1 0 3 again. The first layer as, even at a time of reproducing the signal recorded on the recording film of the second layer of either layer will Rukoto affected by stray light other layers not play.

To obtain a stable reproduction signal is therefore a possible to minimize the amount of light reflected from Iob, it is important to reduce the variation in the amount of light coming from ΙίίΙΕ other layer. The amount of light initially reflected from the other layer, the reproduction amplitude of the signal recorded in each layer from constraint that must be sufficiently ensured, but more to some extent be reduced to the optimization of the recording film, the degree of freedom of control small, it is.

Then although the variation of the amount of light reflected from ¼Il, which the laser beam spot 內 irradiated to another layer data region occupied: ^ and Adoresu region in if occupied, varies greatly. As shown in FIG. 1 0, as compared with the address regions 9 4 Data area 9 5, grooves nor not the ratio of plane mirror area is large pit, correspondingly, less of connexion reflected light diffraction of light growing. Therefore when playing for instance a second layer, the ratio of Adoresu area occupied in the optical spot irradiated to the first layer is large, unnecessary DC component is superimposed on the reproduction signal amplitude of the second layer, the result variation occurs in the regenerated signal. This is shown in Figure 1 2.

1 2, 1 2 1 a recording mark recorded on the second layer, is 1 2 2 1 2 3, 1 2 4 is a light spot for reproducing the second layer. The 1 2 5, 1 2 6 1 2 7 is a light spot for irradiating the first layer when reproducing the signal recorded on the second layer. Light spot 1 2 2 1 2 5 1 2 3 1 2 6, 1 2 4 1 2 7 has been temporally corresponding, a set of light spots irradiating the first layer and the second layer respectively is there. Note the spot diameter of the laser beam to be irradiated to each layer, 6 5 0 nm wavelength of the laser beam, NA and zero pair objective lens 6, and the distance between the two layers and 4 0 m, the second layer power;. 1 m degree, the first layer is 6 0 / xm about.

Further, 1 2 9 is the envelope of the reproduction signal obtained by reproducing the signal recorded on the second layer of the two-layer optical disc. Incidentally, 1 2 8 at the time of reproducing the signal recorded on a single-layer optical disc having a second layer equivalent to recording performance, which is the envelope of the reproduced signal. 1 2 8 1 2 9 In locally envelope compared to fluctuates. This near the position of the light spot Tsu sheet 1 2 3, to occupy the first-layer light spot in Preparative the light spot 1 2 6 illuminates the corresponding the address area, the amount of light reflected from the mirror region, This is because the superimposed second layer of a reproduction signal.

Such unwanted DC component and is superposed local variations occur in the reproduced signal, section 1 2 1 0 and 1 at 2 1 envelope variations such as 1 large to correctly 2 I Jikaka the reproduction signal it becomes impossible. Conversely by increasing the operating frequency of the binarization circuit for obtaining a binary signal, when so as to follow the rapid change of the envelope, now the degree of follow up the signal that should not be to follow naturally like Difuekuto , resulting in reproduction performance is deteriorated.

Thus, when using conventional address setting method of a two-layer disc, Enbero - at variation of flop is large, it is 2 Nei匕 incorrectly reproduced signal, there is a problem that can not play the correct data. The present invention has been made in view of the above problems, and purpose that provides a multi-layer optical disc that enables reproduction data correctly without being affected layers other than the reproduction layer. (The Resolution)

To solve this problem, a multilayer optical disc of the present invention has an information recording layer of the plurality of layers, in a multilayer optical disc of at least one layer optically recordable in the information recording layer, said optically recordable when reproducing an information recording layer other than the recording layer, variation in diffraction efficiency due to the light beam irradiated on the optically recordable information storage 錄層 is, it is within the specified range in the information recording layer .

Further, the multilayer optical disc of the present invention is to solve this problem, has an information recording recording layer of the plurality of layers, in a multilayer optical disc at least one layer capable of recording optically in the information recording layer, the optical a recordable layer, and a data area has a Adoresu area identifying the location of the data area, wie Adoresu region is composed of pit rows of irregularities, in the vicinity of § address block of the Adoresu region, grooves or irregularities to have a pit row.

Further, the multilayer optical disc of the present invention is to solve this problem, the input elevation surface of the reading light has two information recording layers are identical, the groove in the vicinity of Adoresu blocks Adoresu region of one of the layers a, it has a pit row of the unevenness in the vicinity of § address blocks Adoresu region of the other layer.

Further, Adoresu region of the multilayer optical disk of the present invention in order to solve this problem is constituted by the pit row of the irregularities, the section adjacent to the address area and direction, with a pit array of grooves or unevenness.

The Adoresu region of the multilayer optical disk of the present invention in order to solve this problem is constituted by the pit row of concave convex, the section adjacent to the address area and the circumferential groove if Ku has a pit row of the unevenness.

Further, the multilayer optical disc of the present invention in order to solve this problem, the greater the distance of the address area or al, is smaller the width of the groove or irregularities pits. (Valid effect than the prior art)

According to the present invention, it eliminates the variation of the transmittance by even undetectable sector of Adoresu during recording to record a pseudo data, when recording to the other layer, uniform power of Hikaribi over beam can do.

According to the present invention, by recording dummy data in a specific area other than the area for recording data, when recording to the second recording layer located on the same radius around said specific area it can be - the power of the arriving light beam average. BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a cross-sectional view of a two-layer optical disc in the embodiment of the present invention.

Figure 2 is a plan view of a two-layer optical disc in the embodiment of the present invention.

Figure 3 is an enlarged view of Adoresu region in the exemplary embodiment of the present invention.

Figure 4 is an explanatory diagram of a reproduction signal in the embodiment of the present invention.

Figure 5 is a sectional view of a two-layer optical disc in the embodiment of the present invention.

Figure 6 is a plan view of a two-layer optical disc in the embodiment of the present invention.

Figure 7 is an enlarged view of Adoresu region in the exemplary embodiment of the present invention.

Figure 8 is an explanatory diagram of a reproduction signal in the embodiment of the present invention.

Figure 9 is a plan view of a two-layer optical disc in the prior art.

Figure 1 0 is an enlarged view of Adoresu area in a conventional example.

Figure 1 1 is a cross-sectional view of a two-layer optical disc in the prior art.

1 2 is a diagram depicting the reproduction signal in a conventional example.

Figure 1 3 is an enlarged view of the address area in the embodiment of the present invention.

1 4 is an enlarged view of Adoresu region in the embodiment of the present invention.

Figure 1 5 is an enlarged view of the address area in the embodiment of the present invention.

Figure 1 6 is an enlarged view of the address area arranged randomly in the embodiment of the present invention.

Figure 1 7 is a diagram depicting the arrangement address area in a spiral in the embodiment of the present invention.

Figure 1 8 is a diagram depicting the Adore source region disposed discretely vortex wind-field in the embodiment of the present invention.

Figure 1 9 is an enlarged view of the address area in FIG 7.

Figure 20 (a), (b) is an enlarged view of the case of arranging in the enlarged view and a vertical direction (radial direction) when arranged in the inclination direction of the address area in FIG 8.

Figure 2 1 (a), (b) is an enlarged view of the case of arranging in the enlarged view and a vertical direction (radial direction) when arranged in the inclination direction of the address area in FIG 7.

Figure 22 is an exploded perspective view of a two-layer optical disc used in the recording apparatus of the embodiment of the present invention.

Figure 23 is a proc view of the form of the recording apparatus of the present invention.

FIG. 24 (a), the illustration of the recording how the (b), (c), (d), (e), (f), the present invention.

Figure 25 is a plan view of a two-layer optical disc used in the recording apparatus of the embodiment of the present invention.

Figure 26 is an explanatory view showing a recording state of the two-layer optical disc used in the recording apparatus of the embodiment of the present invention.

Figure 27 (a), (b), (c) is an explanatory diagram showing the recording state of the recording light Dace click by a conventional recording apparatus.

Figure 28 is an explanatory diagram that shows the optical characteristics of the phase change recording medium. BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1)

Hereinafter As the multi-layer optical disc in the embodiment of the present invention, it will be described with reference to the drawings Te. Figure 1 is a cross-sectional view of a two-layer optical disc of the first embodiment according to the present invention. In Figure 1, 1 0 1 and 1 02 are transparent substrates such as polycarbonate, 1 03 first-layer recording film, 1 04 you transmitting or reflecting laser light incident from 1 01 translucent reflection film, 1 05 second layer of the recording film, 1 06 1 0 1 reflective film that reflects lasers first light incident from, 1 07 the property of transmitting light for bonding the substrate 10 1 and the substrate 102 an adhesive agent having.

Referring now to Figure 2. Figure 2 shows the sector structure of the two-layer optical disc shown in FIG. The two-layer optical disc 21, a groove-shaped groove tracks 23 is provided with land tracks 22 between the grooves. Information is recorded cracking line for both tracks, one round of track is divided into one or more Adoresu region 24 and the data area 25. If one round of track is divided into a plurality of sectors, an address area 24 and the data area 25 for each sector is assigned. In this case, each § dress region 24 is also referred to as a Sekutadoresu area. The land track and the group track with the configuration of the track may be the ivy disk connected to a continuous spiral in every lap.

Referring now to Figure 3. Figure 3 shows a two-layer optical disc 2 1 a Adoresu region 24 more detailed. The groove track 23 is illustrated a, 23 b, 23 c, and the land track 22 a, 2 2 b is Adoresu region indicating the address of each sector respectively assigned. For example in order to indicate the address of the groove track 23 a, in the address region 24, two address blocks consisting of a plurality of pit rows 3 1, 32 is provided. The land tracks 22 a information, comprising a plurality of pits two address blocks 33, 34 are provided. Further, 3 1 1, 3 1 2, 3 1 3 3 1 4, 3 1 5 is a groove in the dummy. Each of § address block 3 1, 32, 33, 34, are shown by circles in the figure, in fact, composed of a plurality of pre-pits which are arranged in succession in the track direction. The groove 3 1 1 dummy, 31 2, 3 1 3 3 14, 3 1 5 it Zorewa is shown in landscape rectangle in the figure, actually, along connexion successively in the track direction may be composed of a plurality of pre-pits which are arranged, it may be constituted by an elongated rectangular groove of one. Further, one elongated rectangular groove may be interrupted by the mirror portion in the middle.

Detection of the dummy groove, or if carried out by a dummy groove itself, there is a case where the distance between the mirror portion before or after the dummy groove. For example, a case where the dummy groove itself, the groove of the dummy 3 1 1, 3 1 2, 3 1 3 3 14, 3 1 5 respectively, do not appear on the actual recording data pit array (one elongate or also include) a rectangular groove, or by a special pit array indicating the dummy groove, completion and data dresses blocks, and distinguishable from the data recorded on the track. Further, as a case of a mirror part of the interval before or after the dummy groove, the groove 3 1 1 dummy one, 3 1 2, 3 1 3 3 1 4, 3 1 5 each front portion or after provided mirror portion having a predetermined width in a square section, performs discovery of the dummy groove by the detection of such a mirror unit.

The address blocks adjacent land tracks, since the shift track position of the address block of dull one Butorakku has the effect of crosstalk is hardly when reproducing the Adoresu information. Incidentally, the grooves 3 1 1, 3 1 2 dummy, for example, consists of a rectangular groove of width substantially equal, crosstalk Ingredient does not occur.

Referring now to Figure 4. 4, 4 1 a recording mark recorded on the second layer,

4 2, 4 3, 4 4 is an optical spot for reproducing the second layer. Also 4 5, 4 6, 4 7 a Hikarisu pot irradiating the first layer when reproducing the signal recorded on the second layer. Light spot 4 2 and 4 5, 4 3 and 4 6, 4 4 and 4 7 are temporally corresponding is the set of light spots irradiating the first and second layers, respectively. Note the diameter of the laser beam spot irradiating the layers, 6 5 0 nm wavelength of the laser beam, NA and 0 of the objective lens. 6, when the distance between the two layers and 4 0 m, the second layer 1 about m, a first layer forces S 6 0 mu about m.

The 4 8, 4 9, 4 1 0 a envelope of the reproduction signal, 4-8 at the time of reproducing the signal recorded on the single layer optical disc having a recording performance of the same or the like and the second layer, the reproduction signal it is an envelope. The 4-9 at the time of reproducing the signal recorded on the second layer of conventional double-layer optical Dace click having no dummy groove, which is the envelope of the reproduced signal. 4, 4 9 locally envelope compared to 8 fluctuates. In the vicinity of this light spot 4 3 position, to the first layer of the light spot 4 6 corresponding occupied address area light spot to be irradiated, the amount of light reflected from the mirror region, the second layer because superimposed on playback signals. In 4 9 sections 4 1 1 4 1 2 can not be correctly binarizing the reproduced signal.

Meanwhile 4 1 0 at the time of reproducing the signal recorded on the second layer of the two-layer optical disc having a dummy groove of the present invention, an envelope of the reproduced signal. To the address area of ​​the first layer has a dummy groove, mirror area is reduced, unnecessary DC component superposition for the second layer of the reproduction signal decreases. Thus becomes small local variations of the reproduction signal can be correctly 2 Nei匕 the reproduction signal can and reproduced correctly child recording data.

In the present embodiment has described a multilayer optical disc incident surface of the reading light has two information recording layers are identical, the information recording layer is not limited to two layers, it may be more .

As for the information recording layer, it is not necessary that all the information recording layers is recordable, an information recording layer of at least one layer recording, the remaining layers may be read-only information recording layer.

In the present embodiment, in order to suppress the local variations of the reproduction signal, it is provided with the dummy groove, the dummy groove if the mirror area is reduced, and at the smaller the crosstalk component is negligible not limited to, it may be in other shapes such as a dummy of the pit.

In the present embodiment, near the dummy of § address blocks of all Adoresu region - are provided grooves, as long as reducing local variations of the reproduced signal, the configuration of the dummy grooves in different configurations it may be filed.

Note multilayer optical disc of the present embodiment, has the dummy grooves or pits in the near vicinity of § dress proc of Adoresu region, the may have a some sort of information the groove or pit Bok. As an example, within a range that does not affect the crosstalk, the dummy grooves provided on the land track, the dull one Butorakku by providing a dummy pit, it is possible to identify the land track and group tracks. Similarly, the dummy grooves provided in the first layer, by the this providing a dummy pit 2 Bimoku can identify the first and second layers.

In the present embodiment has been described a signal recorded on the second layer as an example, the same applies to the signal recorded on the first layer, the dummy in the vicinity of the address block of the address region of the second layer of by providing the groove, it is possible to reduce the local variations of the reproduction signal at the time of play back signals recorded on the first layer. In this case, a small light spot narrowed to the surface of the recording film of the first layer is formed, large light spot on the surface of the serial in the second layer is formed. Note Adoresu regions of the present embodiment is configured by two Adoresubu lock comprising a plurality of pitch Bok, if the address pit the shape of the irregularities may be in another configuration.

The § address blocks Ya dummy grooves of this embodiment, are disposed at the center position of the track, as shown in FIG. 1 3, the groove of the address block and the dummy, the boundary position of the run-de track and group tracks According, also it has been placed in.

Incidentally address area of ​​the present embodiment, although the arrangement aligned in the radial direction, even if § address region lined irregularly, by providing the dummy groove, a portion of the track, the track without it is possible to reduce the difference in reflectance of a portion, it is possible to reduce the local variations of the playback signals.

Note dummy grooves of this embodiment, with respect to the track center, but is provided at a position separated by a half tracks in the radial direction, as long as reducing local variations of the reproduced signal, it may be provided in a different position.

Note multilayer optical disc of the present embodiment, it has the dummy grooves or pits in the near vicinity of § address blocks Adoresu region, so that there is no local variations due to the address area of ​​the layer other than the reproduction layer, Ryo it is also possible to arrange to distribute the dress area. Be arranged to distribute the address area, but-out Baratsu diffraction efficiency due to the light beam becomes small, the same effect as this embodiment can be obtained. A As a method of arranging dress area dispersing the, in the case of providing a random Shi desirable to place Iga, address area for each predetermined capacity of the data area as shown in FIG. 1. 6, FIG. 1 7 in the shown Suyo example for each track, substantially arranged as a fixed address area in the disc central angle 0 (angle definitive in the center of the disk) is shifted, it may be arranged so that the address area is arranged in the vortex wind-shaped . In this embodiment, the sequence of address regions, when observing the number 10 tracks, so as not aligned in the radial direction. That is, the tangential direction of the sequence of the address area is, so as not coincide with the radial direction. Disc shown in FIG. 1 7 is also good good A disk of a constant angular velocity (CAV type), may be a disk of a constant linear velocity (CLV type). In Figure 1 7, although the spiral direction of the first and second layers are the same, it may be arranged to have opposite directions. Further, as shown in FIG. 1 8, several zones of the disk in the radial direction (e.g., inner zone, central zone, an outer zone) divided into an address area 1 80 1 for each zone,

It may be arranged to shift the 1 803. Between two Adore scan area adjacent to the track direction is a data area 1 802, 1 804. Disc shown in FIG. 1 8 also may be a disc of constant angular velocity (CAV type), may be a disk of a constant linear velocity (CN type). 1 8, in particular, spacing Adoresu area adjacent to the track direction are summer to be constant. Sorting et al is in each zone, arc tangent of the arcuate Adoresu region 1 80 1 arranged in, 180 3, so as not to coincide with the radial direction of the disk. Thus, against the radially inclined a collection of Adoresu region Adoresu regions are arranged as inclined Adoresu territory Ikigun.

It shows an enlarged view of FIG. 1 7 1 9 (direction of rotation of the vortex depicted in Figure 1 7 and Adoresu region in FIG. 1 9 is decreased to the contrary). The address area of ​​the first layer may not overlap the address area of ​​the second layer.

Note the concentration of Adoresu region, unless they give local variations that can not be followed slice level a reproduction signal of the other layers, the arrangement of the address regions is not limited to this, there a different arrangement and it may be. The dummy groove or pits may not be formed, may be formed.

Next, FIG. 20, refer to FIG. 21. 20, 2 1 is shown when playing the second layer, the state of the light spot 1 90 1 which is irradiated to the first layer. 20 (a) is intended to correspond to the disk shown in FIG. 1 8, inclined address area group 1 902 in one zone, the light spot 1 901, is shown the state included Sutsubori cage, FIG. 20 (b), there is no collection of vertical Adoresu area groups 1 903 f ^ g direction are arranged the Adoresu area), the state contained in the light spot 1 90 1 Suttsu Helsingborg is shown . Also, FIG. 2 1 (a), which corresponds to the optical disc shown in FIG. 1 7, inclined Adoresu area groups 1 905 force spot 1 90

1 are shown across the state obliquely, FIG. 20 (b), vertical address area group

State 1 906 force light spot Bok 1 901 traversed vertically is shown.

By occupying a light spot 1 90 1 內 is Adoresu area, superimposed amount of light reflected from the Mi La part of Adoresu region for the second layer of the reproduction signal, the reproduction apparatus to local variation of the reproduction signal amplitude due to superposition slice level can not be can be not made the correct play follow-up of.

Here comparing vertical address area group 1903 shown in FIG. 20 (a) inclined address region group 1902 and Figure 20 (b). Width W of the inclined Adoresu area group 1902 and the vertical Adoresu area group 1 903 equal. As state illustrated, in the state where the address area group is contained in the light spot comfortably, the ratio of the area address area group occupies the light spot Tsu the TMG, the case 20 of (a) , equal Les, in the case of FIG. 20 (b). However, the time the light spot 1901 is the track direction with the lapse of 厶 t, that is, when shifted to the left or right, for example, FIG. 20 (a), the the position of the shown to light spot Bok 1901- a in FIG. 20 (b) If displaced, while some delta s inclined Adoresu region group 1902 is shifted out of the light spot 1901 _ a, vertical Adoresu region group 19 03, the light spot 1901- a, a state in which still contained wholly since the subsequent, the ratio of the area occupied by the light spot 1901- a is towards the vertical Adoresu region group 1903 by the remote inclined Adoresu region group 1902 decreases.

Furthermore over time delta t, light spot I, when was not to the position of the light spot 1901- b, a portion of the inclined Adoresu area group 1902 (about 2 delta s) are outside of the light spot 1 90 1-b while shifts in approximately half of the vertical address area group 1903 (about 2 厶 s), shifted out of the light spot 1 901 and b.

If Adoresu region with respect to time of the change delta t is a variation delta s of the area occupied by the light spot 1901 內 the decrease of F, increase or decrease the degree of F is expressed by the following equation.

F = A s / Δ t

If from the example above, ^ Adoresu region group 1902 ^ is increased or decreased degree F s is whereas a 厶 s / delta t, in the case of vertical address area group 1903, increase or decrease the degree Fv is 2 delta s Roh 厶 t, and the increase or decrease of F is about 2 times. Decrease of F s in the case of inclined Adoresu region group 190 2, varies with the width W of the angle and area groups of tilt, but compared to the increase or decrease of Fv in the case of vertical § address area group 1903, always smaller. The 增減 degree F is proportional to the slope in the section 41 1, 412 of the envelope signal 49 of Figure 4. As described above, it the inclination is small is preferred since, towards the inclined Adoresu region group 1902 than vertical address area group 1 903 is preferred. Therefore, the Adoresu region extending radially by placing obliquely with respect to the light spot moving direction, it is possible to increase the reproduction performance than arranged vertically. Next, FIG. 2 1 (a), comparing ^ # DOO address area group 1 9 0 5 perpendicular Adoresu area group 1 9 0 6 in FIG. 2 1 (b). Than itlW inclined Adoresu area group 1 9 0 5, is narrower width W e of the apparent measured in the inclined direction. Than the width W of the vertical Adoresu group 1 9 0 6, since towards the width W e of the apparent tilt Adoresu group 1 9 0 5 is narrow, increase or decrease of the cases I around swash Adoresu area group 1 9 0 5 F s , compared with 增減 of FV in the case of vertical Adoresu area group 1 9 0 6, small les. Accordingly, FIG. 2 1 (a), also in FIG. 2 1 (b), by placing the address area extending radially obliquely relative to the light spot moving direction, higher reproduction performance than arranged vertically can do. Such playback performance when the time of reproducing the second layer there is leakage of the first layer, the arrangement of the address regions, the spot diameter, the reflectivity of the second layer, the first layer reflectance at the eye, the first layer transmission, but that depend on the response speed such as a plurality of items of the slice level, the arrangement of the address regions as described above, the design and the recording film, for the design of reproduction apparatus it is possible to have a margin.

Note the arrangement of second layer address area when playing the first layer Nitsu and is also, by Rukoto be arranged obliquely to the radial direction of the address area with respect to the light spot moving direction, it is possible to increase the reproduction performance than arranged vertically.

In the layer is not a reproducing layer as described above, with respect to the light spot moving direction address area by not arranged vertically, it is a child prevent deterioration of reproduction performance of the reproducing layer.

Note also Adoresu region over several tracks are arranged perpendicularly to the optical spot moving direction, the width of the multiple tracks is less than or equal to nearly as small Le ,, for example 1 0% negligible relative to the optical spot diameter if so, a plurality of tracks may be arranged vertically.

Note multilayer optical disc of the present embodiment has been described Adoresu area composed of the pit row of the unevenness, is the same for realm servo area and the other composed of pit rows of irregularities, dummy groove by and pits, the same effects as long as reducing the mirror area in the vicinity of the address proc. (Embodiment 2)

Will be described with reference to the drawings multilayer optical disk according to different embodiments of the present invention follows. Figure 5 is a sectional view of a multilayer optical disc of the second embodiment according to the present invention. 5, 5 0 1 and 5 0 2 transparent substrate such as polycarbonate, 5 0 3 first-layer recording film, 5 0 4 5 0 1 translucent to transmit or reflect laser light incident from reflective film, 5 0 5 second-layer recording film, 5 0 6 reflective film that reflects laser first light you incidence than 5 0 1 5 0 7 bonded substrate 5 0 1 and the substrate 5 0 2 an adhesive having a property of transmitting light for Ru combined.

Referring now to Figure 6. 6 shows the sector structure of the multilayer optical disk shown in FIG. The multi-layer optical disc 61, a groove-shaped groove tracks 6 3, is provided a land track 6 2 between the grooves. Data area 6 5 are eclipsed set the groove track, Adoresu region 6 4 is provided on a land track.

If one round of track is divided into a plurality of sectors, and § de Les region 6 4 and a data region 6 5 is assigned to each sector. In this case, each address region 6 4 with Adoresu region calls * is.

Referring now to Figure 7. Figure 7 shows a Adoresu region 6 4 of the multilayer optical disc 61 more detailed. The illustrated with that land track 6 2 a, 6 2 b, 6 2 c, respectively Group tracks 6 3 a, 6 3 b, 6 3 Adoresu region showing Adoresu of each sector of the c is allocated. For example in order to show the § address of the groove track 6 3 a, in the address area of ​​the land track 6 2 a is three address comprising a plurality of pin Tsu preparative column block 7 2, 7 3, 7 4 arranged It is. To demonstrate the Sekutadoresu of the groove track 6 3 b Similarly, in Adoresu area of ​​the land track 6 2 b includes three § address block including a plurality of pit strings

7 5, 7 6, 7 7 is provided. Further, 7 1 1, 7 1 2, 7 1 3, 7 1 4, 7 1 5, 7 1 6 is a groove in the dummy.

Referring now to Figure 8. 8, 8 1 a recording mark recorded on the second layer,

8 2, 8 3, 8 4 is an optical spot for reproducing the second layer. The 8 5, 8 6, 8 7 when reproducing the signal recorded on the second layer, a light spot illuminating the first layer. Optical spot 8 2 and 8 5, 8 3 8 6, 8 4 and 8 7 temporally pair 2

15 has response is the set of light spots irradiating the first and second layers, respectively. Incidentally spot diameter of the laser beam for irradiating each layer, 6 5 0 nm wavelength of the laser beam, and NA of the objective lens 0.6, when 4 0 μ πι the distance between the two layers, the second layer but about lm, the first layer is about 6 0 im.

The 8 8 8 9 8 1 0 is the envelope of the reproduced signal, 8 8 at the time of reproducing the signal recorded on the single layer optical disc having a recording performance of the same or the like and the second layer, the reproduction signal it is an envelope. The 8 9 at the time of reproducing the signal recorded on the second layer of conventional double-layer optical Dace click having no dummy groove, a Enbe rope reproduced signal. 8 8 locally envelope in 9 compared to 8 fluctuates. This is near the position of the light spot 8 3, to the first layer of the optical spot 8 6 corresponding occupied address area light spot 內 irradiating amount of reflected light from the first layer is reduced, the first Ri of less superposition of DC component generated at the time that irradiates the non Oite Adoresu region layer, apparently, because the reproduction signal of the second layer is reduced. In 8 9 sections 8 1 1 8 1 2 can not be correctly binarizing the reproduced signal in.

Meanwhile 8 1 0 at the time of reproducing the signal recorded on the second layer of the two-layer optical disc having a dummy groove of the present invention, an envelope of the reproduced signal. For adjacent to the address area of ​​the first layer has a dummy groove, Kunar size time constant of decrease in the amount of reflected light. For time constant was larger summer, even decrement comparable amount of reflected light, local variations of the reflected light amount is reduced, occurs time allowance for binarizing the reproduction signal correctly reproducing recorded data correctly be able to.

In the present embodiment has described a multilayer optical disc incident surface of the reading light has two information recording layers are identical, the information recording layer is not limited to two layers, it may be more .

The information recording layer Nitsu, even not need all the information recording layers is recordable, an information recording layer of at least one layer recording, the remaining layers be read-only information recording layer good.

In the present embodiment, in order to alleviate the local variations of the reproduction signal, it is provided with the dummy groove, rather than limited to the dummy groove as long as it has the same effect, the dummy it may be in other shapes, such as pit. In the present embodiment, it is provided with the groove of the dummy one in the vicinity of § address blocks of all Adoresu region, if reducing local variations of the reproduced signal may be different configurations.

Note multilayer optical disc of the present embodiment, Ryo has the near-near the dummy grooves or pits § address block dress area, the groove or any force to pitch Bok, may have the information. As an example, the dummy groove is provided on the first layer, by providing a dummy pit in the second layer, it is possible to identify the first and second layers. In the present embodiment, the signal recorded in the second layer has been a connexion explained as an example, also for the signal recorded on the first layer, the vicinity of Adoresu blocks Adoresu region of the second layer to by providing the dummy groove, it is possible to alleviate the local variations of the reproduction signal at the time of play back signals recorded on the first layer.

Note Adoresu regions of the present embodiment is configured by three Adoresupu lock comprising a plurality of pits, if the address pit the shape of the irregularities may be in another configuration.

Incidentally address area of ​​the present embodiment, although the arrangement aligned in the radial direction, also in order, irregular § address region, by providing the dummy groove, a portion of the address pit Bok, can mitigate the variation of the reflectivity of the portion having no Adoresupitto, it is possible to relax the local variations of the reproduced signal.

Note dummy grooves of this embodiment, with respect to completion dress proc, if alleviate local variations of the force reproduced signal are provided at the same position in the direction, they are arranged in different positions good.

Although dummy grooves of this embodiment is rectangular, as shown in FIG. 1 4, the groove width closer to the address block may be thicker. The farther away mosquitoes Ru direction from the address block, by narrowing the groove width, it is possible to alleviate the local variations of more playback signals.

Further, instead of the groove of the dummy of the present embodiment, a plurality of dummy pits, and, as the pit width near the address blocks may be summer thick. In a direction away from the address block, by narrowing the pit width can mitigate local variations of more playback signals. The dummy groove shown in FIG. 7, and not the force lengths having a length comparable to the address area is not limited to this, as shown in FIG. 1 5, for example, between the address area groove of the dummy may be provided continuously to. Thus, it is possible in all of the data area is substantially uniform the effect of DC component caused by the other layer. Note multilayer optical disc of the present embodiment has been described Adoresu area composed of the pit row of the unevenness, is the same for realm servo area and the other composed of pit rows of irregularities, dummy groove by and pits, the same effects as long as reducing mirror a region in the vicinity of the address block.

Described so as have, having an information recording layer of the multilayer incident surface is the same reading light, in at least one layer recordable multilayer optical disk is optically in the information recording layer, in a concavo-convex of the address pit the section you adjacent constituted address area and ^ direction, by providing the pit row of the dummy grooves or irregularities, due to Adoresu region of layer different from the reproducing layer, localized in the reproduction signal of the reproducing layer to reduce the fluctuation, data can be reproduced correctly.

Also has an information recording layer of the multilayer incident surface is the same reading light, at least one layer of said information recording ^ Y in recordable multilayer optical disk is optically constructed in a concavo-convex of the address pit Bok the section adjacent to the address area in the circumferential direction, by providing the pit row of the dummy grooves or irregularities, due to the address area of ​​the layer different from the reproduction layer, relax the local variations in the reproduction signals of the reproducing layer , it is possible to correctly reproduce the data.

In the above, by preliminarily providing that the pit row of the dummy grooves or irregularities on the surface of the multi-layer optical disc has been described a multilayer optical disc so as to mitigate an abrupt change of the reflected light from the multilayer optical disc, in the following, multilayer when locally can Miki zone by scratches on the front surface of the optical disc, so as to relieve the sudden Heni spoon of the reflected light from the force mowing area, recording a mark for preventing reflection to the non-serial zone About recording method and apparatus it will be described.

(Embodiment 3)

By the way the optical disk has a generally sector structure, the recording operation is performed for each sector, unless abnormality such as tracked Ichipo or focus servo comes off during the recording, the recording of the data in the middle of the sector It will not be terminated. Incidentally order to increase the reliability at the time of reproduction in the data, since the error correction code in a unit, called a block composed of a plurality of sectors are added, recorded data is usually carried out block units.

Now consider the reliability of the data, but reliable at the time of reproduction by the error one correction code described above increases, but still, initial defect when the optical disc manufacturing, the recording film by performing and scratches in use, the repetitive recording there is that it can not recording and reproducing the data by the deterioration. Contrast is taken the countermeasure as described below.

- Ways to record actual data, examines the correctly recorded has' Luke playing immediately thereafter, a method of re-recording in a different location if it is not correctly recorded. Another method also can not be detected is address assigned to the sector, or triplication, etc. more than two can not be detected in the address recorded is quadruple, when it can not clear the address detection criterion, that sector as a poor reliability, without recording the block containing the pre-Symbol sector or the sector, is a method for recording on area allocated as a spare in its instead.

Incidentally, recording information on an optical disk having a plurality of recording layers as described above - when you play, there is a problem mentioned below. The normal recording layer, for use phase change materials, an organic dye film and the like, data, by irradiation with light beams is recorded by forming pits of varying optical JP '(4 medium surface. Thus, If viewed from the irradiation morphism surface of the light beam is recorded on the back of the recording layer, the difference in optical science properties by recording 'unrecorded before the recording layer, different light beam power that reaches the back of the recording layer, the recording - there was that play to give an adverse effect.

The two-layer disk as an example connexion be described. 2 6 in the first recording layer showing one illustration Pawa of the light beam reaching the second recording layer in the case of recording and non-recording. In the figure, 2 2 0 2 the first recording layer, the 2 2 0 4 second recording layer, 2 6 0 1 unrecorded area of ​​the first recording layer, 2 6 0 2 first recorded area of ​​the recording layer, from 2 6 0 3 2 6 0 5 are each light beam.

The first recording layer 2 2 0 2 and the second recording layer 2 2 0 4 is a phase change material. The first recording layer 2 2◦ a further 2 has the optical characteristics shown in FIG 8. Recording layer is Miki recording state shown in the left of FIG. 2 8 is a crystalline state, is irradiated with a light beam, it becomes Amorufu § scan state shown on the right, forming pits. The unrecorded state of the left, 2 0% of the incident light anti shines, 4 0% is absorbed, 4 0% is transmitted. 1 0% of the incident light is reflected at the right of the recording state, 3 0% is absorbed, 6 0% is transmitted.

Light beam power that reaches the second recording layer at this time when irradiated with light beam 2 6 0 3, 2 6 0 4 2 6 0 5 having the same Pawa scratch, in descending order, the light beam 2 6 0 3 2 6 0 4, 2 becomes 6 0 5. This is the first recording layer is for having the optical properties there is a difference in transmittance during the crystal state and Amorufu § scan. Therefore people during amorphous than in crystals with optical properties is high transmittance, as the light beam a total area is large pit occupied in spot within bets of the first light beam of the recording layer is easily transmitted. Chi words, even a light beam of a power that reaches the second recording layer when the total area of ​​the pit Bok of the first light beam spot 內 recording layer is irradiated with the largest light beam 2 6 0 3 top growing. The difference in power of the light beams, and out variations in pit shapes formed, problem or out distortion in the reproduction signal is likely to occur.

To solve such a problem, for example, a method is conceivable that performs recording than the near Rere recording layer on the irradiated surface of the light beam. Since this makes it possible to uniform the transmittance of front recording layer is effective also to equalize the power of the light beam when recording the back of the recording layer.

However, only records the data from the first recording layer, recording the area allocated when not clear the address detection criterion as described above, as a preliminary Instead of recording the block including the sector or the sector the so that the Shimare ,, the first recording layer will remain Miki zone go. Thus, the conventional recording method, for example, scratched or the front layer, such as address adhering fingerprints can not be detected, when the area of ​​unrecordable has 增大, the transmittance of the front of the recording layer change, the effective power of # ^ to the light beam to be recorded on the back of the recording layer is disadvantageously changed. As previously mentioned spare area in addition, When the user is not necessarily recorded area exists in recording data, the rest is the area between the unrecorded state, the back near the same radius as the fffB region when the effective power of the light beam changes when the recording layer Rere / JP00 / 05,952

There has been a 20 cormorant problem.

It is an object of this embodiment, the recording method of the optical information which is not affected by the optical characteristics of recording and non-recording of another layer, to provide a recording apparatus.

Recording method of the optical information in this embodiment, the incident surface of the reading light has an information recording surface of the double several layers of the same, at least one layer of said information recording surface data optically recordable optical disc the recording method of an optical information recording and records the dummy datum to the determined area and unrecordable during data recording.

The recording method Niore optical information in this embodiment Te,, to determine the unrecordable are not satisfy a predetermined Adoresu reading conditions, the case.

The recording method for an optical information in this embodiment, the incident surface of the reading light has an information recording surface of the same Der are multiple layers, at least one layer of said information recording surface on a recordable optical disc optically the recording method of an optical information recording data, recording the dummy data in a specific region other than the region to record the data.

In the recording method of the optical information in the form of this embodiment, the information recording surface is composed of a plurality of zones divided in radial direction, it said specific region is a region of the boundary of adjacent zones.

In the recording method of the optical information in the form of this embodiment, the specific area is an area for recording disc management information.

2 2 is a block diagram of an optical disk in this embodiment.

In the figure, 2 2 0 1 The first substrate, 2 2 0 2 the first recording layer, 2 2 0 3 adhesive resin, the 2 2 0 4 second recording layer, the 2 2 0 5 second 2 of substrate, 2 2 0 6 clamp hole 2 2 0 7 lead-in area, 2 2 0 8 defect list area, 2 2 0 9 Wasupe § region, 2 2 1 0 is a data area . The first substrate 2 2 0 1, second substrate 2 2 0 5, constituted by poly force one Bonnet Ichito resin, the first recording layer 2 2 0 2 及 Pi second recording layer 2 2 0 4 to protect. The 2 2 1 1 Ridin region, 2 2 1 2 the defect list area, 2 2 1 3 spare area, is 2 2 1 4 is a data area.

The first recording layer 2 2 0 2, the second recording layer 2 2 0 4 has a plurality of tracks in a spiral shape or concentric circular shape. Track consists of a plurality of sectors. Note in the present embodiment is recorded at the beginning of the first recording layer 2 2 0 2, in a region where recording is ended in the first recording layer 2 2 0 2, the recording on the second recording layer 2 2 0 4 Assumed to be performed. In this case the first recording layer 2 2 0 to after confirming the state in which the recording is terminated in the second whole surface may begin recording the second recording layer 2 2 0 4, the data area 2 2 1 0, when 2 2 1 4 is divided into a plurality of zones as shown in FIG. 2. 3, after confirming the state in which the recording is terminated in the first specific zone of the recording layer 2 2◦ 2, said zone it may be recorded in the second recording layer 2 2 0 4 zones that are located on the same radial position.

Also to each sector in the present embodiment a quadruple Adoresu is toying concavo-convex pits. By thus addresses the multiple, in particular it is possible to increase the reading rate of address at the time of reproduction. Incidentally address is not limited to quadruple, also may not be formed in each sector, or may be formed by a method other than the pit as Woburingu track.

Prescribed modulation rule is on each sector, for example, it records the modulated information 1- 7 modulation scheme as a pit. Formation of pits is performed by changing the optical properties of the material of the recording layer by a light beam of power. Light beam is irradiated from the first substrate 2 2 0 1 side. Reproducing the second recording layer 2 2 0 4 is performed by the light beam transmitted through the first recording layer. The first recording layer 2 2 0 2 materials in the present embodiment, a phase change material having optical characteristics as shown in FIG 8. The material of the recording layer may be an organic color Motomaku like not limited to the phase change material. The optical properties is also an example, it has such may be those having other characteristics. Adhesive resin 2 2 0 3, bonding the first recording layer 2 2 0 2 and the second Kimatoi 2 2 0 4. Clamp bore 2 2 0 6 is provided for passing a pintle for transmitting rotation of the spindle motor.

Referring now to Figure 2 3. Figure 2 3 is a block diagram of a recording apparatus of the optical information in the embodiment of the present invention. 2 3, 2 0 0 optical disc drive, 2 0 1 optical disc, 2 0 2 Supindonoremo Ichita, 2 0 3 head to light, the 2 0 4 Hikaribi

- beam control circuit, 2 0 5 servo circuit, the 2 0 6 reproduction binarizing circuit, 2 0 7 Digi tal signal processing circuitry, the 2 0 8 recording compensation circuit, the 2 0 9 CPU, 2 1 0 is a host Bok PC.

Optical disc drive 2 0 0, the optical disc 2 0 1, spin de Sole motor 2 0 2, head 2 0 3 to the light, the light beam control circuit 2 0 4, the servo circuit 2 0 5, the reproduction binarization circuit 2 0 6, digital signal processing circuit 2 0 7, constitutes the recording compensation circuit 2 0 8, CPU 2 0 9.

Optical disc 2 0 1 is the same as that described in FIG 2. The spindle motor 2 0 2 is a motor for rotating the optical disc 2 0 1. Light head

2 0 3 irradiates a light beam to the optical disc 2 0 1. Further, by converting the reflected light of irradiating light beam to the optical Dace click 2 0 1 into an electrical signal and outputs it as a reproduced signal. Light beam control circuit 2 0 4 controls the Pawa one light beam output from the head 2 0 3 to light. Control is performed based on an instruction from the CPU 2 0 9. Sa Ichibo circuit 2 0 5, the position control of the optical heads 2 0 3, the focus, tracking control, the spindle motor

Performing 2 0 2 of the rotary control. Play binarizing circuit 2 0 6, the reproduced signal obtained from the optical head 2 0 3, amplifies, binarizes process to generate a binarized signal. Also the internal PLL (not shown), and generates a clock synchronized with the binary signal.

Digital signal processing circuit 2 0 7, Adoresuri one de during the predetermined demodulation processing to the binary I No. 匕信 of Adoresu unit, for address extraction process. Reproducing data is predetermined demodulation process on the binarized signal of the data unit, generates reproduction data subjected to error correction processing. Data recording error correction code adding process in a recording de one data, performs predetermined modulation processing to generate a modulated data. Also the generation of the dummy data to be described later performed by the digital signal processing circuit 2 0 7.

Recording compensation circuit 2 0 8 converts the modulated data into optically modulated data from the pulse train, further pulse width of the light modulation data, subtly adjust the amplitude or the like, into a recording pulse signal suitable for pit formation . CPU 2 0 9 controls the overall optical disc drive. Host PC 2 1 0 is constituted by a computer (not shown) and application (not shown), an operating system (not shown), performs recording and reproducing request to the optical disc drive 2 0 0.

Referring now to Figure 2 4. Figure 2 4 is a diagram showing the presence or absence of the recording for each block of the data region 2 2 1 0, spare area 2 2 0 9, the defect list area 2 2 0 8. Slight 2 4, portions of the fill Te is recorded is any data, it indicates that indicates that blank portions are unrecorded. Optical disc SL 552 with reference to FIG. 2 to 4

A record at the time of the operation of the 23 recording and reproducing apparatus will be explained.

Against host PC210 from CPU 209, when the recording request of the data is performed to the first recording layer (in this case shall be recorded from the block BO 1 data area 2210 until BO 5), Sa Ichibo circuit 205, the optical head 203 is moved to the vicinity of a sector having a Adoresu the recording request. Digital signal processing circuit 207, head 203 to light Adoresuri based on binarized signal obtained through reproduction binarization circuit 206 - performs the process of de. Upon reaching the head sector of the block B 01, performed again Adoresuri one de, if possible Adoresu detection criteria Kuria, digital signal processing circuit 207, a recording compensation circuit 208, the light beam control circuit 204, via the optical head 203 modulation by a light beam irradiation, recording data from the blocks B 01 in this order as shown in FIG. 24 (a). At that time, the light beam output from the optical head, that is controlled by the light beam control circuit 204 to the power value instructed by a predetermined amount of CPU 209. Incidentally address detection criterion in the present embodiment, among the quadruple address, on two or more are with what can be detected.

Here, during the recording of the block BO 3, consider the case could not be cleared address detection reference sector B 07. Dijitanore signal processing circuit 207, which adds an error correction code block unit composed of a plurality of sectors, when it detects a sector which can not Kuria the even one Adoresu detection criterion in the block to be recorded once the recording of the data is discontinued, the optical head 203 is moved to the spare area 2209 performs Oite address read processing instruction address of CPU 209 (e.g., address of the head sector of the block B09), if clear address detection criteria, just one block re is recorded in the block B 09 as shown in FIG. 24 (c) data. Note it is assumed that data already is recorded in the block B 08.

When re-recording is completed, head 203 to the light is moved to the data area 2210 again, as shown in FIG. 24 (d), the block B 0 which can not be cleared address detection criteria

The remaining data is recorded in the third is a continuation block B04 and B05.

When a series of data recording is completed, the optical head 203 is moved to the defect list area 2208, as shown in FIG. 24 (e), the proc B 14 according to the instructions of the CPU 209, the head Adoresu information of the defect blocks, re-recording the one block top Adoresu information of the spare area 220 9 records went.

When the recording of the defect list area 2 2 0 8 is completed, head 2 0 3 to the light is moved to the data area 2 2 1 0 Again, as shown in FIG. 2 4 (f), the defective block B 0 3 to record the dummy data to. Note that when recording the dummy data, performs address read processing, and OK if detecting any one of the example quadruple address, if the clear if Ku is Adoresu detection criteria of the previous sector it says to the OK sea urchin, if there is to be recorded on the mistake other sectors, the recording of dummy data by loose Adoresu detection criteria than ¾ ^ to record the data. The dummy data is recorded single frequency signal having a VFO signal to the head, for example.

With the configuration described above, by recording the dummy data even if undetectable sector address during recording, to eliminate the variation of the transmittance in those recording layer, in recording the other layer, of the light beam it can be made uniform power.

Incidentally processing algorithms defective sectors in the present embodiment is an example, dummy

- like the recording of Adoresu information in the defect list area 2 2◦ 8 after recording data, but other algorithms if the dummy data is recorded sector which can not be cleared Adoresu detection criteria. The spare area 2 2 0 9 is also not limited to the inner peripheral portion as in this embodiment.

In the present embodiment, although § address detection criteria in the data recording is performed to record the dummy data to the block containing the Kinaka ivy sector Kuria, some abnormality during recording is not limited to Adore scan detection criteria , for example by the focus servo during recording abnormal or tracking service Ichibo abnormality can not perform the recording operation of the sector unit, means pursuant also recording of dummy data to the block containing the while remaining sectors of the non-record state good.

Also in this embodiment, recording is performed in the dummy data in blocks, while the sector only paragraph shall be recorded in the dummy datum to left unrecorded state. Further, in this embodiment, although the dummy data recorded user has performed can the data is recorded, may be performed in an initial test called Thirty Huai performed when the optical disc of the follower one mat . This time may be the data used in Thirty Huai as dummy data. In addition the Adoresu detection criteria in the Thirty Huai T / JP00 / 05952

25 when there can not sector Kuria, instead of recording the dummy one de one data block by block as in the data recording, dummy in sectors - de - be recorded data good les.

The time of recording of the dummy data, so as not to accidental erasure of data of adjacent tracks, the data may be performed record of pit at a lower power value than the case of recording.

Also when recording the data when Fomatsuto of the optical disk 20 1 or the first, the defect list area 2208 may be previously recorded dummy data in the spare area 2209. Defect list area 2208, by recording the Damide one data in the spare area 2209, the second recording layer, when recording to the second recording layer disposed on the same radial position as the region it can be made uniform power of the light beam reaching the.

Further, as the data area 22 1 0 shown in Figure 25, the Rutoki are divided into a plurality of zones, for example, speed or different for each zone in the case of ZCLV recording, the number of sectors per track is different from from several tracks of zones boundary even if you are unrecorded state, when that records data in Fomatsuto time or first, may be previously recorded dummy data. This Figure 27

To avoid a situation such as in (b), however, the Pawa one light beam reaching the time for recording on the second recording layer located on the same radius around the said region can be made uniform. FIG. 27 (a) is the first recording layer indicates the case of recorded, FIG 2 7 (b), the first recording layer indicates the case of some recorded, FIG. 27 (c) the first recording layer showing the case of unrecorded. Also, FIG. 2 7 (a), has been shown (b), each of the bottom, the waveform of the light beam power that reaches the second record layer (c). The dotted line waveform in FIG. 27 (a) is, for comparison, are displayed as is.

Furthermore not only the above-mentioned spare area and a defect list area or zone boundary area, by recording dummy data in a specific area other than the area for recording data, the are arranged in the same vicinity as the specific region a light beam of power it reaches when recording to the second recording layer can be made uniform.

Claims

The scope of the claims
1. At least the first layer and has an information recording surface of the second layer, wherein the information disc least first layer of the recording surface is recordable information recording plane optically recording information of the second layer when reproducing the surface, variation strength of the diffraction efficiency due to the light beam to be irradiated on the information recording surface of the first layer;, JP ^ to be within the specified range by the information recording surface 內 of the first layer [ optical disk to be.
2. At least the first layer and has an information recording surface of the second layer, the optical disc is the first layer is a recordable information recording surface optically least of said information recording surface, the information recorded in the first layer the face, and a data area has address areas for specifying the location of the data area, the address area is composed of a pit sequence of irregularities, in the near vicinity of the address area, the pit array of at least groove or irregularities optical disc and having either one.
3. Also the second layer is a recordable information recording plane optically, has a groove in the vicinity of the address area on the information recording surface of the first layer, the address area in the information recording surface of the second layer optical disk according to claim 2, characterized in that it has a pit row of the convex in the vicinity.
4. The Adoresu area and in the section radially adjacent, optical disc of claim 2 Symbol 载 characterized by having a pit array of grooves or unevenness.
5. The Adoresu region and the section adjacent to the circumferential direction, the optical disk according to claim 2, wherein a pit Bok rows of grooves or unevenness.
6. The A larger distance from the dress area, the optical disc of claim 5, wherein a width of the groove or irregularities of pits is reduced.
7. At least the first layer and has an information recording surface of the second layer, wherein the information disc least first layer of the recording surface is recordable information recording plane optically recording information of the first layer the surface has a data area, the address area identifying the location of the data area, the address area is composed of a pit sequence of irregularities, an optical disk, wherein the address regions are arranged randomly .
8. At least the first layer and has an information recording surface of the second layer, the optical disc is the first layer is a recordable information recording surface optically least of fiilS information recording surface, recording information of the first layer the face, and a data area has address areas for specifying the location of the data area, before Ϊ himself address area is composed of a pit sequence of irregularity, each of the address area is offset a predetermined amount in the radial direction of the disk the optical disc to feature that Adoresu area is arranged to be shifted (angle at the center of Dace h) substantially constant disk center angle theta.
9. At least the first layer and has an information recording surface of the second layer, the first layer of the information recording Rokumen of the information at least a first layer of the recording surface is recordable information recording surface optically disc recording method of the optical information in the recording method of the optical information, characterized in that to determine impossible or can be recorded for every predetermined area, to record dummy data in the recording is judged impossible area for recording data on.
1 0. Determination of ttrlB recording impossible, the claims, characterized in that certain areas in the reading of given address information respectively, the case does not satisfy the predetermined reading condition
Recording method of an optical information according 9.
1 1. At least the first layer and has an information recording surface of the second layer, the information recording of the information recording surface of the least the first layer of the first layer is a recordable information recording surface optically disc recording method Niore optical information recording data on the surface Te, recording how the optical information, characterized by recording the dummy datum in a specific area other than the area for recording data.
1 2. SfllS information recording surface is composed of a plurality of zones divided in the radial direction, prior Symbol particular regions, according to claim 1, characterized in that the region of the boundary zone of ¾
Recording method of the optical information 1 wherein.
1 3. The specific area is a recording method of claim 1 1 optical information according to that the area for recording disc management information.
PCT/JP2000/005952 1999-09-02 2000-09-01 Multilayered optical disk WO2001018799A1 (en)

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