JPH09320120A - Recording disk processing apparatus and processing method, and recording disk manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make enable processing an output of processing energy at high speed by controlling the processing energy output, so that when an energy giving position exists in an inner peripheral part of a recording disk, it is controlled to be smaller than the case when the position exists in the outer peripheral part. SOLUTION: A rotating device 7 holding an optical disk 1 to initialized is started to be rotated uniform speed at respective speeds Wo(rad/sec). Then, an exposure unit is moved, so that the position r of the energy giving position 10 in the disk radial direction of the exposure unit 2 on the optical disk 1 becomes the r imm, corresponding to the innermost peripheral part of the recording area of the optical disk 1. Simultaneously, a traverse motor 3 is rotated until the position r of the energy-giving position 10 ion the disk radial direction becomes the rf mm, corresponding to the outermost peripheral part of the recording area of the optical disk 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for performing a predetermined process on a recording disk such as a magnetic disk, a magneto-optical disk or a phase change type optical disk while applying optical energy such as laser light or magnetic energy. It also relates to a method for manufacturing such a recording disc.

[0002]

2. Description of the Related Art Magnetic disks, magneto-optical disks, phase change optical disks, etc. are widely used as recording disks. When manufacturing these recording disks, the recording film made of a magnetic material on a disk substrate made of resin, metal, glass, etc., the recording film having the Kerr effect, or a layer between the crystalline phase and the amorphous phase by heating and cooling is used. It is often the case that a recording film or the like that can be changed is formed, and this recording film is kept in a uniform state to some extent by a predetermined process. A part or all of such processing or a series of processing including this processing may be referred to as initialization processing.

The above process will be described below by taking a phase change type optical disc as an example of such a recording disc. The phase change type optical disc is, for example, a disc substrate made of a transparent resin such as polycarbonate, a first protective layer,
A recording layer, a second protective layer, and a reflective layer are formed in this order to form a film-formed disc, and two discs are adhered together or individually to form a recording disc. Further, this may be provided in a cartridge or the like.

The recording layer is, for example, chalcogenite-based GeSbTe-based, InSbTe-based, AgInSbTe-based, InSe-based, In
Te series, AsTeGe series, TeOx-GeSn series, FeSeSn series, SbSeBi series,
BiSeGe system, TeGeSbPd system, TeGeSbPdNb system, NbGeSbTe system, Pt
It is formed by depositing an alloy such as GeSbTe-based, NiGeSbTe-based, CoGeSbTe-based or an alloy containing these as a main component on the disk substrate on which the first protective layer has been formed by sputtering, ion plating or vacuum deposition. After that, a second protective layer, a reflective layer, and the like are laminated to form a film-formed disc.

The first and second protective layers are used for mechanical protection of the recording layer and for imparting resistance to moist heat, for example, ZnS.
, SiO ₂ , Ta ₂ O ₅ , ITO, ZrC, TiC, MgF ₂ , C
And the like, or a mixture thereof. The reflective layer is, for example, Zr, Cr, Ta, Mo, Si, Al, Au, Pd, Hf.
It consists of such metals and their alloys. These films are often formed by the same method as the recording film.

As a method for initializing such a recording film, Japanese Unexamined Patent Publication No. 4-366424 discloses a method of irradiating a single laser light beam on the optical disk while rotating the optical disk to measure the temperature of the recording film at that portion. A method is disclosed in which the temperature is raised to the crystallization temperature or higher, and after the laser light beam has passed, the site is allowed to cool to form a homogeneous crystal phase, and the initialization is thereby performed.

However, in such a method, while the optical disc is rotated while changing the angular velocity according to the radial position of the laser light irradiation portion, the laser light beam is scanned so as to scan the entire recording area of the optical disc. Since it is necessary to control the position, the operation becomes complicated, and the time required for the initialization is inevitably long, from several tens of seconds to several minutes.

[0008] Such a problem of processing is a problem common to other recording media using a disk, and has been a problem that can occur in both magnetic disks and magneto-optical disks.

[0009]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and perform a predetermined process on a recording portion of a recording disk by a simple control and a high-speed recording process. An object of the present invention is to provide a processing apparatus, a processing method, and a recording disk manufacturing method for a recording disk.

[0010]

According to the present invention, there is provided a rotation holding means for rotating a recording disk at a constant speed while holding the recording disk, and a processing unit for applying processing energy to the surface of the recording disk held by the rotation holding means. An energy applying part moving means for moving the energy applying part by the processing unit in the radial direction of the recording disc, and a processing energy output when the energy applying part is on the inner peripheral part of the recording disc. There is provided a recording disk processing apparatus comprising energy control means for controlling the processing unit so as to make the size smaller than that of the recording disk.

Another aspect of the present invention is a rotation holding means for rotating the recording disk at a constant speed while holding it, and energy having a radial spread on the surface of the recording disk held by the rotation holding means. A processing unit that applies processing energy to the application site and a processing energy output in the energy application site in the inner peripheral portion of the recording disk among the energy application sites are set to be smaller than the energy application site in the outer peripheral portion. Further, there is provided an apparatus for processing a recording disk, comprising: an energy control means for controlling the processing unit.

Further, a preferred aspect of the present invention provides the recording disk processing apparatus, wherein the energy applying area includes a plurality of areas different in the radial direction of the recording disk.

Further, in a preferred aspect of the present invention, the processing unit includes a plurality of energy generating means, and the plurality of parts respectively correspond to the plurality of energy generating means, respectively. The processing device is provided.

A preferred embodiment of the present invention provides the recording disk processing apparatus, wherein the energy applying portion has an elliptical shape whose major axis direction is substantially the same as the radial direction of the recording disk.

Further, in a preferred aspect of the present invention, the energy control means controls the processing unit so that the processing energy is substantially proportional to the distance from the center of the recording disk to the energy application site. A recording disk processing device is provided.

Further, in a preferred aspect of the present invention, the energy control means includes a processing unit so that the processing energy output substantially maintains a proportional relationship with an offset with respect to a distance from the recording disk center of the energy applying portion. A processing device for a recording disk according to any one of claims 1 to 6, which is for controlling.

Further, a preferred aspect of the present invention provides a processing apparatus for a recording disk, wherein the processing unit includes a light beam generating means and / or a magnetic generating means.

Further, according to the present invention, when the processing energy is applied to the recording disk surface while rotating the recording disk at a constant speed, the energy application site on the recording disk surface is the inner circumference of the recording disk. There is provided a method of processing a recording disk, wherein the processing energy is controlled so that the processing energy when the recording disk is in a partial area is smaller than that when the recording disk is in an outer peripheral area.

Further, the present invention is a method for producing a recording disk in which a recording film is formed on a disk substrate and a predetermined process is performed while applying energy to the recording film while rotating the disk substrate at a constant speed. Thus, there is provided a method for manufacturing a recording disk, wherein the energy is controlled so that the energy when the energy applying portion is in the inner peripheral portion of the disc substrate is smaller than that in the outer peripheral portion.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings by taking an initialization process of a phase change type optical disk as an example.

FIG. 1 is a model diagram showing the main part of the initialization device of the present embodiment (first embodiment). In FIG. 1, the initialization device includes a disc rotation device 7 that rotates the optical disc 1 while holding it, an exposure unit 2 that irradiates the optical disc 1 with a laser light beam, and a traverse that moves the exposure unit 2 in the radial direction of the optical disc 1. Mechanism 6
And a control unit 8 for controlling the traverse mechanism 6, the disc rotating device 7, and the exposure unit 2.

The disc rotating device 7 rotates the optical disc 1 at a constant angular velocity ω while holding it. A range of 100 to 1000 [rad / sec] is used as each speed ω, and the rotation speed is controlled so that the speed fluctuation range is, for example, about 0.1% or less. As the motor used for rotation, a pulse motor or a DC or AC motor servo-controlled by an encoder is preferably used. In this embodiment, for example,
A simple pulse motor with speed control is used.

The exposure unit 2 comprises a semiconductor laser 2a and an imaging lens 2b. The semiconductor laser 2a generates a laser beam, and the imaging lens 2b irradiates the optical disk 1 surface with light energy in a concentrated manner. In the case of initializing a phase change type optical disc, the semiconductor laser 2a has a wavelength λ = 670 to 850 [n
m], maximum power applied to the energy application site 10 on the surface of the optical disc P = 10 to 1000 [mW], beam spot spot diameter (area circle equivalent diameter) D = 1 to 200 [μm], or within the beam spot Maximum average power density W = 3 × 10 ^{8 to} 3 × 10
^It is preferable to use one having a condition range of about ¹⁰ [mW / cm2]. The power of the semiconductor laser 2a (output) is controlled by the control unit 8 according to the radial position r of the energy application site 10 as described later.
The power Pm when applying energy to the outermost periphery of 1 is called the maximum power.

The traverse mechanism 6 is a mechanism for changing the position (radial distance from the disc center) r of the energy applying portion 10 on the surface of the optical disc 1 of the exposure unit 2 in the disc radial direction. It consists of a ball screw 4 and a ball screw 5. The ball screw 5 is fixed to the exposure unit 2 while being screwed to the ball screw 4. The ball screw 4 is fixed to the traverse motor 3. As a result, when the traverse motor 3 rotates, the exposure unit 2 moves in the disk radial direction of the optical disk 1 in parallel with the disk surface, thereby moving the position r of the energy applying portion in the disk radial direction.

The control unit 8 moves the rotation of the traverse motor 3 at a constant speed from the innermost peripheral side to the outermost peripheral side so that the energy applying portion on the optical disk 1 by the exposure unit 2 is rotated so that the rotating device 7 is driven at a constant speed. Control each as you would. Further, the power of the semiconductor laser 2a is controlled so as to be smaller when the energy is applied to the inner peripheral portion of the disk than when the energy is applied to the outer peripheral portion.

The initialization device configured as described above operates as follows.

First, the rotating device 7 holding the optical disk 1 to be initialized is activated and rotates at a constant speed at each speed ω ₀ [rad / sec].

Next, the position r of the energy applying portion 10 of the laser light of the exposure unit 2 on the optical disc 1 in the radial direction of the disc becomes ri [mm] corresponding to the innermost peripheral portion of the recording area of the optical disc 1. The exposure unit moves to.

Next, the irradiation of the laser light from the exposure unit 2 is started. The laser power P at this time is P _i [W]
Then, the spread of the beam spot in the radial direction of the disc (full width at half maximum of power) is D _r [μm], and the spread in the disc circumferential direction is D _c [μm]. The area of the beam spot is
It is S [μm2]. If the beam pot is circular, S = π
It becomes D _r 2/4. In the case of an elliptical shape whose major axis direction or minor axis direction coincides with the disk radial direction, S = πD _r D _c / 4.

At the same time, the traverse motor 3 rotates until the position r of the energy applying portion 10 in the radial direction of the disc reaches r _f [mm] corresponding to the outermost periphery of the recording area of the optical disc 1. The moving speed v _t of the energy applying site 10 in the radial direction of the disk is determined by v _t = (1-f) D _r (ω ₀ / 2π) (1). Where f is an overlap index between 0 and 1 (see Fig. 2).

In this way, the laser light is emitted from the optical disc 1
The entire recording area is sequentially irradiated. Focusing on a certain small portion (having a spread smaller than the spot size of light) on the recording area, the recording film of this small portion is initialized by the passage of the energy applying portion 10 (beam spot). That is, the recording film material in the small portion is heated to a temperature equal to or higher than the crystallization temperature by the energy application, and after the energy application site 10 is moved, the energy is not applied and the temperature of the recording film material is lowered to be in a crystalline state. Of.

In this case, the total energy density x [J / cm ₂ ] applied to the small portion (the position r in the radial direction of the disk) at one passage of the energy application portion 10 is such that the beam center passes through the portion. Then, x = PD _c / (r ω ₀ S) (2). Let x be x _{0 at} this time. Total energy density
Ideally, x is constant over the entire recording area, and in order to do so, it is preferable that P / r be a constant value. In practice, unless the beam spot is rectangular in shape, the total energy density at the portions where both ends of the beam spot in the disc radial direction pass is lower than when the central portion passes.

FIG. 2 shows this state. Assuming that the beam spot at a certain moment is 10, and the beam spot after the optical disk 1 makes one rotation is 10 ', the overlapping portion 12 of 10 and 10' receives energy twice, but it is imparted by one pass. The minimum total energy density x _min is x ₀
× (D _cmin / D _c ). Here, D _cmin is the maximum length of the overlapping portion 12 in the disc circumferential direction. Although the above assumes that the power density in the beam spot is uniform, the power density at the end of the beam spot is about 0.5 times that at the center, so the minimum total energy density becomes smaller. The larger the overlap index f is, the larger D _cmin becomes, and the total energy density received by each part of the recording area becomes closer to that uniform, but the initialization time becomes longer.

In the above discussion, it is assumed that the applied energy does not dissipate from the energy application site during energy application. If the time required to apply energy (application time) is long and the energy is dissipated during that time, the above equation (2) is modified as follows.

X = PD _c / (r ω ₀ S) -E _d (3) Here, the density E _d of the energy to be dissipated is defined by the beam spot area S 1, the irradiation time, the layer structure of the disk, the irradiation energy, etc. Although it is a complicated function, it is assumed to be proportional to the irradiation time for simplicity. In this case, since the rotational angular velocity of the disk is constant, the equation (3) becomes x = PD _c / (r ω ₀ S) -b / r (4). Here, b is a function that does not depend on the position r in the radial direction of the disk. It can be seen that in order to keep the total energy density x constant, the laser power P should be in the form of P = Ar + B (5). Therefore, when it is necessary to consider energy dissipation as described above, the processing energy has a component proportional to the position r in the disk radial direction of the energy application site and an offset component not depending on r. It is preferable that there is a proportional relationship with an offset with respect to the position in the disk radial direction.

As described above, the value of x is preferably uniform in each part of the recording film, but is a value sufficient to initialize the temperature of the recording film to the crystallization temperature or higher (essential energy density).
And a value (safe energy density) that is small enough not to cause damage to the recording film, the film of another optical disk, and the disk substrate, it can be said to be substantially uniform. Therefore, in the present invention, even if D _cmin is smaller than D _c , P / r fluctuates, or the angular velocity ω ₀ of the rotating device 7 fluctuates, the energy is applied by a single energy application to each part of the recording area. If the total energy density x is equal to or more than the essential energy density and is equal to or less than the safe energy density, all are substantially uniform. The essential energy density and the safe energy density can be defined in the same manner whether the recording disk is a magneto-optical disk or a magnetic disk.

Therefore, the control unit 8 detects the position r in the disk radial direction of the energy application site by the exposure unit 2 and controls the output of the semiconductor laser 2a to be proportional to this value. The value of P may be changed stepwise within the range where the density x is uniform.

Next, with reference to FIG. 3, a second embodiment of the present invention in which a plurality of energy irradiation sites are processed while irradiating energy by taking advantage of the fact that the rotation angular velocity of the recording disk rotating device 7 can be made constant. Will be explained. Figure 3
Portions common to and are omitted. In this embodiment, the exposure unit 2 has a plurality of semiconductor lasers and an imaging lens, and has a plurality of energy irradiation parts 10a.
, 10b, 10c and 10d can be energized at the same time. That is, the energy irradiation site
10 has a radial spread. Thereby, initialization can be performed at a speed proportional to the number of energy irradiation sites. At this time, the positions of the respective energy irradiation sites in the radial direction of the disk are r _a , r _b , r _c , r _d , and the applied powers P _a , P _b , P _c , P of the respective energy irradiation sites.
_d , beam spot area S _a , S _b , S _c , S _d , spread of beam spot in the disc circumferential direction D _ca , D _cb , D
_cc and D _cd are P _a D _ca / (r _a ω ₀ S _a ) = P _b D _cb / (r _b ω ₀ S _b ) = P _c D _cc / (r _c ω ₀ S _c ) = P _d Set so that D _cd / (r _d ω ₀ S _d ) (3) is satisfied. However, the above-mentioned equal signs shall be established when they are uniform in the above meaning. That is, the expression (3) means that each term of the expression (3) is equal to or more than the essential energy density and equal to or less than the safe energy density.

As a case where the formula (3) is satisfied, for example, a laser beam having the same specifications is used for each energy application site, and P _a / r _a = P _b / r _b = P _c / r _c = P _d / The power of each semiconductor laser may be controlled so as to satisfy r _d . That is, this is a case where the respective processing energies are made substantially proportional to the distances from the disc center of the respective energy application sites. In this case, since r _a > r _b > r _c > r _d holds, control is performed so that the energy application site on the inner circumference of the disc has a smaller power application than the energy application site on the outer circumference side. To be done. Even in this case, the power of each laser is increased as the energy application site moves to the outer peripheral side as the traverse motor 3 is driven, but if a sufficiently large number of energy application sites can be provided, the exposure unit 2 The difference between the initial position and the final position of is sufficiently small, and even if the power of each laser is kept at the initial setting value, if formula (3) is satisfied, uniform initialization can be reliably performed in a short time. The structure of the control unit 8 is simplified.

Next, the third aspect of the present invention will be described with reference to FIG. In FIG. 4, the shape of the energy application site is mainly shown, and other members are omitted. In the present embodiment, the imaging lens is configured such that the shape of the energy application portion is an elliptical shape such that the major axis direction is substantially the same as the disk radial direction. Also in this case, the power of the semiconductor laser is controlled so as to satisfy the expression (2) or the expression (3).

However, as in the above-mentioned embodiment, when the spread _Dr of the energy application site in the disk radial direction is larger than the position r of the energy application site in the disk radial direction, it can be ignored. It is preferable that the power density in the range in which the position r 1 of each part in the disk radial direction is the same is integrated in the disk circumferential direction so as to be substantially proportional to r 1. Also, if the radial expansion of the energy application site is large enough, it is not necessary to move it in the disk radial direction if the conditions such as the power density inside it are set as described above, and the disk is not rotated during a few rotations. Predetermined processing can be performed.

In the present invention, the energy applying means of the processing unit is a coherent light source such as a laser or LE.
Non-coherent light sources such as D, halogen lamps and HID lamps are considered. When the recording disk is a magnetic disk or a magneto-optical disk, an electromagnet or a permanent magnet that gives magnetic energy can be used alone or in combination with the above light sources. Particularly, in the case of a magneto-optical disk, it is preferable to use the light source and the magnet at the same time.

A semiconductor laser is preferable as a laser because it is suitable for dynamically changing the power, but when a large absolute power is desired, a gas laser (for example, an argon ion laser) or a solid-state laser (for example, a YAG laser) is used.
However, a die laser is preferably used when it is desired to change the laser wavelength dynamically.

[0044]

【Example】

Example 1 An example of using the phase change type optical disc initialization device of the 5.25 inch standard having the configuration of FIG. 1 will be described. As an optical disk to be initialized, on a transparent polycarbonate substrate,
A layer of Al _0.979 Hf _0.02 Pd _0.001 is 70 [nm] as a reflective layer, a layer of (ZnS) ₇₂ (SiO ₂ ) ₁₈ C ₁₀ is 35 [nm] as a protective layer, and Nb _0.006 Pd _0.001 Ge _17.3 Sb _{0.26 is} a recording layer. 23 layers of Te _0.5
[nm], a layer of (ZnS) ₇₈ (SiO ₂ ) _19.5 C _2.5 as a protective layer
150 [nm] is formed in this order, and a UV resin overcoat is used. The recording site extends from the radial position r _i = 22 [mm] to r _f = 59 [mm].

The spread of the initialization beam spot in the disc radial direction is D _r = 55 [μm], and the spread in the disc circumferential direction is D _c = 0.85 [μm]. The rotation angular velocity of the disk is 280
Stabilizes to [rad / sec] and the beam spot position is r = r _i
The energy applied to the energy application site on the optical disc surface at the time of is 200 [mW], the energy at r = r _f is 360 [mW], and the laser power of the exposure unit is changed so as to change linearly between them. Control. In this case, the power of the laser has a proportional relationship with the offset with respect to the position in the disk radial direction. Overlap index f is 37%
(The radial length of the overlap portion is about 20 μm.) The time required for the initialization at this time is about 40 seconds.

For example, when the energy dissipation of the recording layer and the protective layers before and after the recording layer is negligible, the energy application site on the optical disk surface when the beam spot position is r = r _{i in} the above case. The energy applied to is 135 [mW], and the energy when r = r _f is
It becomes 360 [mW], and the laser power of the exposure unit is controlled so that it changes linearly between them. In this case, the energy applied to the energy application site is proportional to the radial position r of the energy application site.

Example 2 An example using the same apparatus as in Example 1 except that it has the configuration of FIG. 3 and has four laser beams is shown. The disk to be initialized is the same as that in the first embodiment. Set the innermost position of the beam spot of each beam to 22, 31.25, 40.5, respectively.
And 49.75 [mm], and the energies at that time are 200, 240, 280 and 320 [mW], respectively. Also, the area in charge of each beam is set to 1/4 in the radial direction of the disk,
In the boundary region, 110 [μm], which is twice the spread D _r (55 [μm]) of the energy application site in the disk radial direction, is overlapped. The overlap of this area is D
_It is preferably 1 times or more of _r , and more preferably 2 times or more.

If the overlap index is the same as above, the time required for initialization is about 10 seconds. Again,
The laser power has a proportional relationship with an offset with respect to a position in the disk radial direction.

Further, the power of each beam is set to 220,
It can also be initialized by setting 260, 300 and 340 [mW] (that is, adjusted to the power between the innermost peripheral portion and the outermost peripheral portion of each disk of each of the above-mentioned Embodiment 2) constant.

Comparative Example With the configuration of FIG. 1, the disk rotating device 7 was not constant in angular velocity, the linear velocity of the laser beam was constant at 6.2 [m / sec], and the power of the laser beam was constant at 194.4 [mW]. Other than that, an example using the same device as in Example 1 is shown. The disk to be initialized is the same as that in the first embodiment. The time required for initialization is 69 seconds.

In this case, it is necessary to control the rotational speed of the disk in inverse proportion to the radial position of the energy application site. Further, when energy is applied simultaneously to the energy application site having a large spread in the disk radial direction as in the present invention, it is necessary to perform complicated power control for each radial position of the energy application site.

[0052]

According to the recording disk processing apparatus, the processing method, and the recording disk manufacturing method of the present invention, the processing energy output is obtained when the energy-applying portion of the processing energy is located in the inner peripheral portion of the recording disk. Since the control is performed so as to be smaller than that in the case of the outer peripheral portion, the above processing can be performed at high speed with simple control of constant speed rotation.

According to another aspect of the recording disk processing apparatus of the present invention, since the energy application portion has a spread in the radial direction of the disk, the processing can be performed at a higher speed.

[Brief description of drawings]

FIG. 1 is a model diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a shape of an energy application site and a state of overlap in the present invention.

FIG. 3 is a model diagram showing a schematic configuration of an embodiment of the present invention.

FIG. 4 is a model diagram showing a schematic configuration of an embodiment of the present invention.

[Explanation of symbols]

 1: Optical disc 2: Exposure unit 2a: Semiconductor laser 2b: Imaging lens 3: Traverse motor 4: Ball screw 5: Ball screw 6: Traverse mechanism 7: Rotating device 8: Control unit 10: Energy application site 12: Energy application site Overlapping part

Claims (10)

[Claims] 1. A rotation holding means for rotating a recording disk at a constant speed, a processing unit for applying processing energy to the surface of the recording disk held by the rotation holding means, and energy application by the processing unit. An energy application site moving means for moving the site in the radial direction of the recording disk, and a processing energy output when the energy application site is in the inner peripheral part of the recording disk,
An apparatus for processing a recording disk, comprising: energy control means for controlling the processing unit so that the processing unit is smaller than that at the outer peripheral portion. 2. A rotation holding means for rotating the recording disk at a constant speed while holding the recording disk, and a processing energy is applied to an energy application portion which is held by the rotation holding means and which is spread in a radial direction on the surface of the recording disk. Energy for controlling the processing unit so that the processing energy output in the energy applying portion in the inner peripheral portion of the recording disk among the energy applying portion and the energy applying portion in the outer peripheral portion is smaller than that in the outer peripheral portion. A recording disk processing apparatus comprising a control means. 3. The recording disc processing apparatus according to claim 2, wherein the energy application portion includes a plurality of portions that differ in a radial direction of the recording disc. 4. The processing unit includes a plurality of energy generating means, and the plurality of parts respectively correspond to the plurality of energy generating means, respectively.
The recording disk processing device described in 1. 5. The processing apparatus for a recording disk according to claim 2, wherein the energy application portion has an elliptical shape whose major axis direction is substantially the same as the radial direction of the recording disk. 6. The energy control means controls the processing unit so that the processing energy output is substantially proportional to the distance from the center of the recording disk to the energy application site. The processing device for a recording disk according to any one of claims. 7. The energy control means controls the processing unit so that the processing energy output substantially maintains a proportional relationship with an offset with respect to a distance of the energy applying portion from the center of the recording disk. The processing device for a recording disk according to any one of items 1 to 6. 8. The processing apparatus for a recording disk according to claim 1, wherein the processing unit includes a light beam generating unit and / or a magnetic generating unit. 9. When applying processing energy to the surface of the recording disk while rotating the recording disk at a constant speed,
A recording disk for controlling the processing energy so that the processing energy output when the energy application site on the recording disk surface is in the inner peripheral portion of the recording disk is smaller than that in the outer peripheral portion; Processing method. 10. A method of manufacturing a recording disk, comprising: forming a recording film on a disk substrate; performing a predetermined process while applying energy to the recording film while rotating the disk substrate at a constant speed. A method for manufacturing a recording disk, wherein the energy output is controlled so that the energy output when the applied portion is in the inner peripheral portion of the disk substrate is smaller than that in the outer peripheral portion.