JP2695188B2 - Recordable optical information recording medium, optical information recording medium recording device, and master cutting device - Google Patents

Description

The present invention relates to a recordable optical information recording medium, and an optical information storage medium recording device for transmitting and receiving signals to and from the recordable optical information recording medium. The present invention relates to a master cutting device for manufacturing a master serving as a base of this recordable optical information recording medium.

[Conventional technology]

Conventionally, there are a piet edge method and a pit position method as a method for recording information on an optical information recording medium. The pit edge method is a binary information signal "1".
Signal (high level) or “0” signal (low level) corresponding to the rising edge and the falling edge of the signal are generated in order to generate a piet edge modulation signal, and the pit edge modulation signal can rise or fall. A recording method of forming the leading edge and the trailing edge of a recording portion (for example, a pit), which has been put to practical use in compact disks and video disks. On the other hand, the pit position method is the "1" of binarized information.
Is a recording method in which one pit is formed in response to the signal of "0" or the signal of "0", and is put to practical use in a recording type optical information recording disk having a recording layer made of a heat mode recording material.

In the pit edge method, since 2 bits of information can be recorded in one pit, the recording density can be made higher than that of the pit position method in which only one bit of information can be recorded in one pit.

[Problems to be solved by the invention]

By the way, as described above, the pit edge modulation signal is generated from a signal obtained by binarizing the original information signal by a desired modulation method such as the 2-7 modulation method or the EFM modulation method. Depending on the number of "1" signals or "0" signals included, the last signal of the piet-edge modulation signal may be "1" or "0". That is, in the case where the rising edge of the pit-edge modulated signal is generated corresponding to "1" of the binarized signal, it is determined that the number of "1" signals included in the binarized signal is an odd number. Becomes the end of "1", and if it is an even number, the end of the pit edge modulation signal becomes "0".

For optical information recording media, such as compact discs and video discs, where recorded information is formed in the form of a pit from the inner edge to the outer edge of the recording area, the cutting light source is turned off when the final signal is cut. As long as the final signal is "1" or "0", no special inconvenience occurs.

However, for an optical information recording medium such as a recording type optical information recording medium in which a pre-format portion having a pit row and a data portion having no prep row are repeatedly formed, the end of the pit edge modulation signal is "1". ,
When attempting to cut the prepit string in response to this "1" signal, the laser beam for prepit-cutting will continue to be emitted from the optical modulator even after cutting the prepit string, and the data section will be lost. When destroyed, it causes inconvenience. Further, in the case of writing the user information in the recordable optical information recording medium, if the end of the signal obtained by the pit-edge modulation of the user information becomes “1”,
Even after the desired user information has been recorded, the laser beam for recording continues to be emitted from the optical modulator, and if the preformat section is damaged, it will cause some trouble.

In the above, the "1" of the pit edge modulation signal is used.
Although the case has been described in which the pre-pit string is cut and the user information is recorded in correspondence with the signal No. 1, the same inconvenience occurs also in the case of corresponding to the signal "0" of the edge-edge modulated signal.

Due to the above-mentioned difficulties in production and use, it has been conventionally considered that the pit-edge method cannot be adopted in a recording type optical information recording medium, and a recording type optical information recording medium having a high recording density is required. It was difficult to provide.

The present invention is to solve the above-mentioned problems of the prior art, and exchanges signals between a recording type optical information recording medium capable of higher density recording and this recording type optical information recording medium. It is an object of the present invention to provide a recording apparatus for performing and a master cutting apparatus for manufacturing a master as a base of this recording type optical information recording medium.

[Means for solving the problem]

In order to achieve the above object, the present invention relates to a recordable optical information recording medium, wherein a recording area is divided into a plurality of sectors, and each sector includes a preformat section including a sync pull-in section and an address section and desired user information. In a recordable optical information recording medium composed of a data section for writing data, a phase correction section for inverting the phase of information recorded in the area to a non-recorded state is provided behind the preformat section and the data section. I made it a structure.

Regarding the master cutting device, at least a laser light source, an optical head that focuses a laser beam from the laser light source on the master, and an optical modulator arranged on the optical path from the laser light source to the optical head, The optical modulator is provided with a cutting optical system having an address signal and a signal generation source for applying a fixed pattern signal other than the address signal, and the preformat section in which the address signal and the fixed pattern signal are recorded on the master and the optical disc. In a master cutting device that alternately forms an address signal and a data part in which a fixed pattern signal is not recorded, a pit edge modulation part that modulates the address signal with a pit edge and a pit edge modulation part from the signal generation source. The pit edge modulated address signal for one sector is output. After that, until the recording of the address signal and the fixed pattern signal in the pre-formatted section of the next sector is started, a reset function for interrupting the output of the address signal from the pit edge modulation section is provided. did.

Further, regarding the recording device, at least a laser light source, an optical head for focusing a laser beam from the laser light source on a recordable optical information recording medium, and information for signal-modulating the laser beam output from these laser light sources. As a recording type optical information recording medium, the recording area is divided into a plurality of sectors, each sector having a pre-format section including a sync pull-in section and an address section, and a desired user. A recordable optical information comprising a data section for writing information, and a phase correction section for inverting the phase of the information recorded in the area to a non-recording state after the preformat section and the data section. In an optical information recording medium recording device in which a recording medium is mounted, a pit edge that modulates an information signal with a pit edge is used as the information signal source. A modulation unit and a reset function for switching the output signal from the pit edge modulation unit to a recording stopped state after the recording operation of the pit edge modulated information signal to the required data unit in the pit edge modulation unit is completed. It is configured to be provided.

[Action]

By providing a phase correction unit that reverses the phase of the address signal recorded in the area to the non-recorded state behind the pre-format unit, the trailing edge of the last address bit can be formed in a closed shape. Further, if a phase correction unit that reverses the phase of the user information recorded in the area to the non-recorded state is provided behind the data section, the trailing edge of the last recording section (eg, pit) is formed in a closed shape. can do.

Therefore, it is possible to perform the pit-edge modulation recording of the address information and the user information, and it is possible to provide a recording type optical information recording medium having a high recording density.

Further, if the master disc cutting device is provided with a pit edge modulating unit at the signal generating source, the pit-edge modulated address pits can be cut on the master disc. Moreover, after cutting the address bits, the reset section is driven so that the intensity of the laser beam for pre-pit cutting is always in the exposure stop state, and the end of the edge-edge modulated address signal becomes "1". The trailing edge of the last address pit can be formed regardless of whether it is "0" or "0".

After cutting the address pit string,
By holding the exposure stopped state for a length of time according to the length of the data section, it is composed of a combination of multiple pit rows with different address pit row lengths, and user information can be recorded following this pre-format section. It is possible to cut a recording type optical information recording medium in which various data portions are pre-formatted.

Further, when the information signal generating source of the optical information recording medium driving device is provided with the pit edge modulating section, the pit edge modulated information signal can be recorded in the data section of the recordable optical information recording medium. Moreover, after recording the information signal,
When the reset section is driven and the intensity of the recording laser beam is set to the exposure stop state, regardless of whether the end of the user information that is modulated by the pit edge is "1" or "0", the end of the last recording section The edges can be formed.

Therefore, information can be written in the data area by the pit edge method with high recording density, and there is no inconvenience such as irradiating the pre-format area with a recording laser beam to destroy the pre-format area.

〔Example〕

First, an example of the pre-format of the recordable optical information recording medium according to the present invention will be described by taking a disk-shaped optical information recording medium as an example.

As shown in FIG. 1, the recording area 1 is formed in a ring-shaped area excluding the innermost peripheral portion and the outermost peripheral portion of the disk-shaped substrate 2. In this recording area 2, a large number of recording tracks 3a, 3b, 3c ... 3x are formed in a spiral or concentric shape, and the tracks on each circumference are composed of a plurality of sectors 4.
It is divided into a, 4b, 4c ... 4x. Therefore, on the plane of the disk-shaped optical information recording medium, the sectors 4a, 4b, 4c ...
The 4x boundary is observed as a straight line extending in the radial direction. Each sector 4a, 4b, 4c ... 4x is assigned a unique address (address) with reference to the innermost recording track and a specific predetermined sector on this recording track. There is.

Each of the sectors 4a, 4b, 4c ... 4x is composed of a pre-format section 5 and a data section 6 as shown schematically in FIG.

The pre-format unit 5 reads out the address information from the address unit 7, the address unit 7 in which the address information unique to the sector is recorded, the phase correction unit 8 for recording the address information in the address unit 7 by the piezo method. Synchronization pull-in unit 9 (VF
O section; Variable Frequency Oscillator) section.

As shown in FIG. 3, in the pre-format section,
A plurality of clock pits 11 having the same length are formed at positions corresponding to the sync pull-in portion 9, and an address start position pit indicating the start position of the address portion is provided at the beginning of the address portion 7.
12 is formed, and following this address start position pit 12, an address pit row 13 is formed in which the address information unique to the sector is signal-modulated.

As shown in FIG. 3, the address bit string 13 has a plurality of address bits 13a, 13b having different lengths, in which a leading edge and a trailing edge are sequentially formed in response to rising and falling of the edge-edge modulated address information 14. , 13c ... are formed. In this embodiment, the address bit 13 corresponds to the "1" signal of the pit edge modulation signal.
The case of forming a, 13b, 13c ... has been described,
It is also possible to form the address bits 13a, 13b, 13c, ... Corresponding to the "0" signal of the address information 14 which has been subjected to the pit edge modulation.

As shown in FIGS. 4 (a) and 4 (b), the phase correction unit 8 is an area for keeping the number of "1" information included in the modulation signal obtained by binarizing the address information always even. is there. That is, in the case where the binarized information includes an odd number of "1" information and the pieto-edge modulated signal 14 obtained by pieto-edge modulation of this information is a "1" signal, FIG. As shown in a), the rear end of the last address pit 13x is formed in the phase corrector 8. Further, when the binary information includes an even number of "1" information and the pieto-edge modulated signal obtained by pieto-edge modulation of this information is a "0" signal, FIG. ), No address pit is formed in the correction section 8.

The data section 6 is composed of a data recording section 14 for recording desired user information and a phase correction section 15 for recording the user information in the data recording section 14 in a piet-edge method.

In the data recording section 14, tracking information for guiding the recording / reproducing laser beam is preliminarily recorded. Based on this tracking information, as shown in FIG. 1, spiral or concentric recording tracks 3a, 3b, 3c.
.. is formed. The recording / reproducing laser beam follows the recording tracks 3a, 3b, 3c ... And writes information in the data part of the specified address, and also writes information already written in the data part of the specified address. read out.

The phase correction unit 15 has the same function as the phase correction unit 8 provided in the pre-format unit 5, and if the edge-edge-modulated information signal is a "1" signal, the final information This is a region that forms the trailing edge of the trailing edge and in which the information pit is not formed when the pit edge modulation signal is a signal of "0".

A recording layer made of a heat mode recording material is formed in a region corresponding to the recording region 1 of the substrate 2, and is formed in an appropriate form according to the type of the heat mode recording material forming the recording layer. Information is written. For example, for a recording layer made of a hole-type heat mode recording material, information is written in the form of through holes (pits), and
Information is written in the form of magnetization domains on a recording layer made of a magneto-optical recording material. Further, in the recording layer made of the phase change recording material, information is written in the form of phase change such as crystal-amorphous or crystal-crystal.

Further, in the above-mentioned embodiment, the pre-formatted portion 5
Although the case where only the clock pit sequence 11, the address start position pit 12, and the address pit sequence 13 are formed has been described above, a sector mark pit sequence indicating a division of each sector may be formed at the head of each pre-format section 5.

Furthermore, in the above-mentioned embodiment, the case where the tracking information is recorded in the entire data section 6 has been described.
For example, when the sample servo method is adopted, the tracking information can be recorded only in a part of the data section 6.

Next, an example of a master cutting device for manufacturing a master used as a basis for the above-mentioned disk-shaped optical information recording medium will be described with reference to a fifth embodiment.
Description will be made based on the drawings.

The master cutting device of the present embodiment includes a spindle motor 22 for rotating a disk-shaped master 21, and a laser light source.
23 and a laser beam 24 emitted from this laser light source 23
Is arranged on the optical path from the laser light source 23 to the optical head 26, and an objective lens 25 for focusing on the master 21 and a transfer motor 27 for transferring the optical head 26 including the objective lens 25 in the radial direction of the master 21. And an optical modulator 28 and a signal generator 29 for applying a drive signal to the optical modulator 28.

The parts other than the signal generating source 29 of the respective parts of the device are the same as those of the conventionally known master cutting device, and thus detailed description thereof will be omitted.

The signal generation source 29 includes a sector length counting unit 31 that counts the length of one sector, an address signal generation source 32 that generates address information according to each sector, and a predetermined fixed signal such as a clock signal. , A signal switching unit 34 for switching the output of the address signal generation source 32 and the output of the memory 33 at a predetermined timing, and a signal switching unit 34.
Modulator which modulates the output of the signal and applies it to the optical modulator 28
35 and a reset section 36 for setting the output of the modulator 35 to "0".

Address signal source 32, memory 33, signal switching unit 3
4.The reset unit 36 is synchronized with the count value of the sector length counting unit 31, and a clock signal or the like is preset at a predetermined position of each sector according to the count value of the sector length counting unit 31. A predetermined fixed signal and address information unique to each sector are cut.

As shown in FIG. 6, the modulator 35 is provided with a flip-flop 37, and the address information a binarized in other parts of the modulator 35 is input to the flip-flop 37 to input a peak edge. The modulated signal b is output. A reset unit 36 is connected to the reset terminal R of the flip-flop 37, and the reset signal c is used to appropriately return the pit edge modulation signal b to "0".

Hereinafter, a method of cutting a master using the master cutting device described above will be described.

First, the spindle motor 22 is activated to rotationally drive the master 21 at a constant angular speed, and the transfer motor 27 is activated to transfer the optical head 26 in the radial direction of the master 21 at a constant speed.

The position of the optical head 26 is controlled by the count value of the sector length counting section 31, and when the optical head reaches a predetermined cutting start position, the cutting of the master is started.

First, the signal switching unit 34 is switched to the memory 33 side, and the fixed pattern signal output from the memory 33 is input to the modulator 35. Then, the modulated signal is the optical modulator.
The light beam 24 emitted from the light source 23 and applied to the light source 28 is subjected to signal modulation, and the modulated light beam 24a is focused on the master 21 by the objective lens 25.

As a result, the clock pit row 11 is cut at the head of the first sector.

After cutting the clock pit sequence 11, when the address section is detected by the count value of the sector length counting section 31, the signal switching section 34 is switched to the address generating section 32 side, and the address information output from the address generating section 32. Is input to the modulator 35. In the modulator 35, the address information is binarized in accordance with a predetermined modulation method, and the modulation signal a is subjected to the pit-edge modulation by the flip-flop 37.

The pit edge modulated signal b is 2 as shown in FIG.
It is generated by sequentially inverting the phase of the signal corresponding to the information "1" of the binarized address information a. This pit edge modulation signal b is a drive signal for the optical modulator 28,
A light beam 24 having a sufficient intensity for cutting the master is emitted from the optical modulator 28 corresponding to the information "1", and a light beam 24a emitted from the optical modulator 28 corresponding to the information "0". The strength of is in the cutting standby state.

Therefore, the objective lens 23 irradiates the master 21 with the modulated light 24a which is signal-modulated by the pit edge modulation signal b, and the leading edge corresponding to the rising edge of this piet edge modulation signal b and the rising edge of this pit edge modulation signal b. The address pit sequence having the trailing edge corresponding to the downstream is cut.

When the last address bit to be formed in the address section is cut, as shown in FIG. 7, the reset signal c is applied from the reset section 36 to the reset terminal of the flip-flop 37. Therefore, as shown in FIG. 7, when the number of "1" signals contained in the binarized address information a is odd, the reset signal c causes the pit edge modulation signal b to change to " Invert from 1 "to" 0 ",
The trailing edge of the last prepit is formed in the phase corrector of the preformat.

Of course, when the last signal of the pieto-edge modulated address information a is a signal of "0", the piezo-edge modulated signal b is not inverted even if the reset signal c is applied, and the address part of the pre-format section 5 is not inverted. The desired address information is completed within 7.

As described above, when the cutting of the address bit string 13 is completed, the optical modulator 28 is activated by the reset signal c.
Since the modulated light 24a emitted from the device is in the cutting standby state, the data part 6 following the address part 7 (phase correction part 8) is not irradiated with the modulated light having an intensity capable of cutting the master. Therefore, destruction of the data section 6 is prevented. The length of the data section 6 is controlled by the count value of the sector length counting section 31.

Similarly, the signal switching unit 34 is switched each time the next sector is detected by the count value of the sector length counting unit 31, and the clock pit sequence 11, the address start position pit 12, and the address pit sequence unique to the sector. 13 and 13 are cut.

On the other hand, the tracking guide groove is formed by superimposing a DC signal on the pre-formatted signal or by using a laser light source.
The laser beam emitted from 23 is divided into two by a beam splitter, and one of them is irradiated without passing through a modulator to be cut. In the latter case, the pre-pit row and the guide groove for tracking can be pre-formatted by a so-called on-land recording method, and the guide groove for tracking is cut in the middle of two adjacent pre-pit rows.

Hereafter, a step of manufacturing a substrate on which the same pre-format as the one that has been cut from the master is transferred,
Then, a desired write-once recording information recording disk is manufactured through a step of forming a recording film on the pre-formatted surface of this substrate.

 Next, a second embodiment of the present invention will be described.

For example, like the ISO (International Organization for Standardization) 5-inch continuous servo format, the sync pull-in section and the address section are repeatedly provided in the pre-format section of each sector, and the address information is signaled by the 2-7 modulation method. In an optical information recording medium that is modulated and pre-formatted,
The remainder of the modulation signal recorded in the address part is recorded up to the next sync pull-in part, and the signal recorded at the beginning of the sync pull-in part becomes "1" or "0". Moreover, 2
-7 The phase inversion direction of the pit edge modulation signal is reversed depending on whether the number of "1" information included in the modulated address information is odd or even.
As shown in the figure, a drive signal having a phase like (d) and (g) and a drive signal having a phase like (e) and (f) are applied to the optical modulator. Therefore, when the leading edge and the trailing edge of the address pit are formed corresponding to the rising edge and the falling edge of the pit edge modulated signal,
Address start position pit trains having different phases are mixedly formed on the master.

The address start position pit must be surely read in order to reliably read the address, that is, to perform normal recording / reproduction. However, when the address start position pit trains having different phases are mixedly formed on the optical information recording medium, the phases of the address start position pit trains 12 of the adjacent sectors are aligned as shown in FIG. 9 (a). 9 and the case where the phase of the address start position pit row 12 of the adjacent sectors is reversed as shown in FIG. 9 (b), the number of pits existing in the laser spot 38 and the number of pits left are left. Differently, there is a possibility that the signal level of the read signal read by this may fluctuate. In particular, such an inconvenience becomes remarkable in the optical information recording medium in which the track pitch is narrowed due to the higher recording density.

It should be noted that the phase of the address start position signal can be made uniform by providing the same phase correction section as described in the first embodiment between each address section and the next synchronization pull-in section. However, this causes a problem that the pre-format section becomes long and the recording capacity of the data section becomes small. The second embodiment is characterized in that the above inconvenience is eliminated by using the head portion of the sync pull-in portion as the phase correction portion.

FIG. 10 shows the format of the optical information recording medium in the second example.

In this embodiment, the sync pull-in section 9 and the address section 7 are repeatedly provided in the pre-format section 5 of each sector a plurality of times, and the phase correction section is provided at the beginning of each sync pull-in section 9 from the second beginning of the pre-format section 5. 39 are included. The data section 6 is the same as the format of the first embodiment.

The size of the phase corrector 39 is the remainder of the modulation signal recorded in the address part. For example, when the address is signal-modulated by the 2-7 modulation method, it is formed to have a size of 6 bits.

The master cutting device applied to the manufacture of the optical information recording medium of the second embodiment will be described below.

As shown in FIG. 11, the master cutting device of the second embodiment has a phase determination signal generating memory 41 added to the signal generating source 29 of the master cutting device of FIGS. 5 and 6, and a modulator 35 thereof. In addition, the phase correction circuit 42 of FIG. 12 is provided. These phase determination signal generation memory 41
The parts other than the phase correction circuit 42 are the same as those of the device of the first embodiment, and detailed description thereof is omitted to avoid duplication.

The output timing of the phase determination signal generation memory 41 is controlled by the sector length counter 31, and the phase determination signal generation memory 41 outputs the phase determination signal i at a predetermined timing from the beginning of the sync pull-in section to the phase correction section 39.

As shown in FIG. 12, the phase correction circuit 42 includes two flip flops 43, 44, an AND gate 45, and a counter 46.
It is composed of

The AND gate 45 inputs the binarized pre-format signal h and the output j of the first flip-flop 43 into two input sections and outputs a gate output k. The output terminal of the AND gate 45 is connected to the trigger input terminal T of the second flip-flop 44, and the gate signal k becomes the trigger signal of the second flip-flop 44.

At the trigger input terminal T of the first flip-flop 43,
The phase determination signal i from the phase determination signal generation memory 41 is input.

The output of the second flip-flop 44 is input to the data input terminals D of the first flip-flop 43 and the second flip-flop 44.

In the counter 46, a value from when the phase determination signal i is input to the first flip-flop 43 to when the next "1" signal of the pre-format signal is input to the AND gate 45 is set as the count value. 1 flip-flop 43
When the Q output of reaches the preset value, this first
The flip-flop 43 of is reset and the Q output is returned to the original state.

From the Q terminal of the second flip-flop 44, a pit-edge modulated pre-format signal 1 is output.

The operation of the phase correction circuit 42 will be described below with reference to the case where the address information is signal-modulated by the 2-7 modulation method as an example.
A description will be given according to the timing chart in the figure.

The pre-format signal h (clock signal) is 2-7
Original signal (100 100 100 ...
The signal is generated in response to the "1" signal in () and is input to one input terminal of the AND gate 45.

When the sector length counter 31 counts the fifth bit of the original pre-format signal from the beginning of the sync pull-in unit 9, the phase determination signal generation memory 41 outputs the phase determination signal i.

When this phase determination signal i is applied to the trigger terminal T of the first flip-flop 43, the phase of the output (gate signal) j of the first flip-flop 43 is inverted from "1" to "0". The count value of the counter 46 is set to "4", and the first flip-flop 43 is reset when the count value of the Q output reaches this value. By this,
The phase of the output j of the first flip-flop 43 is again "1".
Flip to

Therefore, the exit signal k of the AND gate 45 is in a form in which the third signal "1" of the pre-format signal h is inverted to "0".

The pit edge modulation signal 1 rises corresponding to the odd-numbered signal of the exit signal k of the AND gate 45 and falls corresponding to the even-numbered signal of the exit signal k of the AND gate 45.
By inverting one of the "1" signals to "0", it is possible to change the phase of the subsequent piet edge modulation signal.

Therefore, as shown in FIG. 14, whether the leading signal of the sync pull-in unit 9 is “1” or “0”, or the signal recorded in the address unit 7 before the sync pull-in unit 9 is concerned. Irrespective of whether it ends in "1" or "0",
The phases of the address start position signals can be aligned.

Next, the configuration of the optical information recording medium driving device for exchanging information with the optical information recording medium will be described.

The optical information recording medium driving device of the present invention, as shown in FIG. 15, a spindle motor 52 for rotationally driving the optical information recording medium 51, a laser light source 53, and a laser beam 54 emitted from the laser light source 53. An optical system 55 that focuses on the optical information recording medium 51, a photodetector 57 that detects reflected light 56 from the optical information recording medium 51, and a laser beam emitted from a laser light source 53.
It comprises a recording system 58 for signal-modulating 54 and a reproduction system 59 for reproducing information from the output of the photodetector 57.

The recording system 58 includes a data setting unit 61, a modulating unit 62, and a piet edge modulating unit 63.

The reproduction system 59 includes an amplifier 64, a position signal detection unit 65 for detecting a signal indicating a specific position in the sector recorded on the optical information recording medium 51, and a synchronization signal indicating a specific position in the sector for writing a write area. It is composed of a counter 66 that counts until the end.

The bit edge modulator 63 is controlled by the counter 66, and when the counter 66 clocks from the synchronization signal indicating a specific position in the sector to the end of the write area, it outputs an end signal of the write area. Then, it returns to the unrecorded state.

Therefore, the pre-format section of the optical information recording medium 51 is not irradiated with the recording laser beam, and there is no inconvenience such as destruction of the pre-format section.

In the above embodiment, only the case of writing the pit-edge modulated information signal in the data part has been described.
By displaying a mark in one of the pre-format section and the data section indicating that the information in the data section is written in the pit position method, the information is written in the pit position method and the pit position method is used. The information written by the method can also be read.

Further, although the disk-shaped optical information recording medium has been described as an example in the above-mentioned embodiment, the same can be applied to optical information recording media of other shapes such as a card-shaped optical information recording medium.

〔The invention's effect〕

As described above, the recordable optical information recording medium of the present invention is provided with a phase correction unit that reverses the phase of the information recorded in the area to the non-recorded state behind the pre-format section and the data section, and the address section. Further, since the information can be recorded in the data area by the pit edge, the recording capacity can be remarkably improved as compared with the conventional optical information recording medium in which the information is recorded by the pit position method.

Further, according to the master disk cutting apparatus of the present invention, the address information can be cut in the pre-format section by the pit edge modulation method, and the data section is not destroyed. Therefore, it is possible to provide the recordable optical information recording medium in which the address signal and the information signal are recorded by the pit position method.

Furthermore, according to the optical information recording medium driving device of the present invention,
An information signal can be recorded in the data section by the pit edge modulation method, and there is no inconvenience that the pre-format section is irradiated with a recording light beam to destroy the pre-format section. Therefore, a recordable optical information recording medium in which an address signal and an information signal are recorded by the pit edge method can be put into practical use.

BRIEF DESCRIPTION OF THE DRAWINGS All the drawings are for explaining the embodiments of the present invention. FIG. 1 is a plan view of a disk-shaped recording type optical information recording medium, and FIG. 2 is the recording of FIG. FIG. 3 is an explanatory view illustrating an example of a pre-format of the medium, FIG. 3 is an explanatory view showing an example of a pre-pit pattern formed in each part of the pre-format, and FIGS. 4 (a) and 4 (b) show the function of the correction part. FIG. 5 is an optical circuit diagram showing an essential part of the master disk cutting device, FIG. 6 is a block diagram showing a piezo edge modulation part provided in the master disk cutting device, and FIG. 7 is an operation of the piezo edge modulation part. Timing chart, FIG. 8 is a timing chart for explaining the phase shift of the address start position pit, and FIGS. 9 (a) and 9 (b) are main part plan views for explaining the inconvenience caused by the phase shift of the address start position pit. , FIG. 10 is an explanatory view for explaining a second example of the pre-format, FIG. 11 is an optical circuit diagram showing a second example of the master cutting device, FIG. 12 is a block diagram of a phase correction circuit, and FIG. 13 is a phase correction. FIG. 14 is a timing chart showing the operation of the circuit, FIG. 14 is a timing chart showing the phase of the corrected address start position pit, and FIG. 15 is a block diagram showing the configuration of the optical information recording medium driving device. 1: recording area, 2: substrate, 3a, 3b, 3c ...: recording track,
4a, 4b, 4c ...: Sector, 5: Pre-format section, 6: Data section, 7: Address section, 8: Correction section, 9: Sync pull-in section, 1
1: clock pit, 12: address start position pit, 13: address pit, 14: data recording part, 15: correction part, 21: master, 22: spindle motor, 23: laser light source, 24: laser beam, 25: objective lens, 26: optical head, 27: transfer motor, 28: optical modulator, 29: signal generation source, 31: sector length counting unit, 32: address generation unit, 33: memory, 34: signal switching unit, 35: modulator, 36: reset part, 37: flip-flop, 38: laser spot, 39: correction part, 41: phase judgment signal generation memory, 42: phase correction circuit, 43, 44: flip-flop, 45: AND gate, 46: counter, 51: Optical information recording medium, 52: spindle motor, 53: laser light source, 55: optical system, 57: photodetector, 58: recording system, 59: reproducing system, 61: data setting section, 62: modulation section, 63: piet edge Modulator, 64: Position signal detector, 65: Counter.

Claims (11)

(57) [Claims] 1. A recordable optical information recording medium, wherein a recording area is divided into a plurality of sectors, and each sector comprises a preformat section including a sync pull-in section and an address section, and a data section for writing desired user information. 2. A recordable optical information recording medium according to claim 1, further comprising a phase correction unit that reverses the phase of the information recorded in the area to a non-recorded state, behind the preformat section and the data section. 2. The recording type optical information recording medium according to claim 1, wherein an address in which a leading edge and a trailing edge are formed in the address portion in correspondence with rising and falling of pit edge modulated address information. A recordable optical information recording medium characterized in that a pit row is formed. 3. The recordable optical information recording medium according to claim 1, wherein the pre-format section is formed with a plurality of columns alternately with the sync pull-in section and the address section. recoding media. 4. The recordable optical information recording medium according to claim 1, wherein an address start position pit string is formed at the beginning of the address part, the address start position pit string indicating a boundary between the sync pull-in part and the address part. A recordable optical information recording medium characterized by the above. 5. The recording type optical information recording medium according to claim 4, wherein the phase of the address start position pit row is formed to be the same for all sectors formed in the recording area. Optical information recording medium. 6. The recordable optical information recording medium according to claim 1, wherein pit edge modulated user information is written in the data portion. 7. A recordable optical information recording medium according to claim 1, wherein pit position modulated user information is written in the data section. 8. The recordable optical information recording medium according to claim 1, wherein a sector mark pit string indicating a delimiter of each sector is formed in advance at the head of the preformatted portion. Optical information recording medium. 9. A laser light source, and an optical head for focusing a laser beam from the laser light source on a master.
An optical modulator disposed on the optical path from the laser light source to the optical head, and a cutting optical system having a signal generation source that applies an address signal and a fixed pattern signal other than the address signal to the optical modulator, In the master cutting device for alternately forming the preformatted part in which the address signal and the fixed pattern signal are recorded on the master and the data part in which the address signal and the fixed pattern signal are not recorded, in the signal generation source,
A pit edge modulation section that modulates the address signal with a pit edge, and after the pit edge modulation address signal for one sector is output from the pit edge modulation section, the address signal to the preformat section of the next sector and A master cutting device comprising a reset function for interrupting the output of the address signal from the pit edge modulation section until the recording of the fixed pattern signal is started. 10. The master cutting device according to claim 9, wherein the signal generation source includes a phase inverting unit for inverting the phase of one of the fixed pattern signals, and a pre-format signal from the phase inverting unit for pit edge modulation. A master disc cutting device, which is provided with a pit edge modulation unit for 11. A laser light source, an optical head for focusing a laser beam from the laser light source on a recordable optical information recording medium, and an information signal generating device for signal-modulating the laser beam output from the laser light source. As a recording-type optical information recording medium, the recording area is divided into a plurality of sectors, each sector including a pre-format portion including a sync pull-in portion and an address portion and desired user information. A recordable optical information recording medium comprising a data section to be written, and a phase correction section for inverting the phase of the information recorded in the area to a non-recording state after the preformat section and the data section. In the optical information recording medium recording device in which the The pit edge modulation section is provided with a reset function for switching the output signal from the pit edge modulation section to a recording stopped state after the recording operation of the information signal which has been pit edge modulated to the required data section is completed. Optical information recording medium recording device.