WO2007105799A1 - 記録装置、記録制御信号生成装置、転写型の製造方法、転写型及び磁気ディスク - Google Patents
記録装置、記録制御信号生成装置、転写型の製造方法、転写型及び磁気ディスク Download PDFInfo
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- WO2007105799A1 WO2007105799A1 PCT/JP2007/055245 JP2007055245W WO2007105799A1 WO 2007105799 A1 WO2007105799 A1 WO 2007105799A1 JP 2007055245 W JP2007055245 W JP 2007055245W WO 2007105799 A1 WO2007105799 A1 WO 2007105799A1
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- speed
- substrate
- recording
- deflection
- control signal
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/855—Coating only part of a support with a magnetic layer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/317—Electron-beam or ion-beam tubes for localised treatment of objects for changing properties of the objects or for applying thin layers thereon, e.g. for ion implantation
- H01J37/3174—Particle-beam lithography, e.g. electron beam lithography
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/304—Controlling tubes
- H01J2237/30455—Correction during exposure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/30—Electron or ion beam tubes for processing objects
- H01J2237/304—Controlling tubes
- H01J2237/30472—Controlling the beam
- H01J2237/30483—Scanning
Definitions
- the present invention relates to a recording apparatus that uses an exposure beam such as an electron beam, a laser beam, or a charged beam, and more particularly to a recording apparatus that manufactures a master disk of a recording medium such as an optical disk or a magnetic disk using the exposure beam, and a recording apparatus
- the present invention relates to a control signal generator, a transfer mold manufacturing method, a transfer mold, and a magnetic disk.
- Beam recording apparatuses that perform lithography using exposure beams such as electron beams and laser beams are used in digital versatile discs (DVDs), optical discs such as Blu-ray discs, and hard discs for magnetic recording. Widely applied to large volume disc master production equipment.
- DVDs digital versatile discs
- optical discs such as Blu-ray discs
- hard discs for magnetic recording. Widely applied to large volume disc master production equipment.
- a predetermined uneven pattern along the track is formed on the master, and this master force also forms a disk stamper. Then, using the disc stamper, a synthetic resin or the like is subjected to hot press processing or injection molding to perform metal vapor deposition on the recording surface on which the pattern is transferred from the master, and then a translucent substrate or the like is formed.
- the pattern recording on the master is performed by a beam recording apparatus.
- a spiral or concentric track trajectory is controlled to be drawn on the substrate recording surface by rotating the substrate recording surface serving as a master while appropriately sending the beam in the radial direction.
- Non-Patent Document 1 Non-Patent Document 1
- a pit pattern was recorded by beam deflection control instead of beam on-Z off control (see Patent Document 1).
- Non-Patent Document 1 Y. Uda et al., “High-density recording using an electron beam recording device”, Japan 'Journal of Applied Physics, Vol. 40, 1653—1660 (2001) ("High- Density Recording using an Electron Beam Recorder, Y. Wada et al "Jpn. J. Ap pi. Phys. Vol. 40 (2001), pp.l653-1660) (Page 1655, Fig. 4)
- Patent Document 1 Japanese Unexamined Patent Publication No. 2000-315637 (Page 3, Figure 2)
- the conventional technique for realizing a data space portion by performing beam blanking has a problem in that a beam current is lost.
- defocusing occurs when the beam deflection increases, so it is necessary to perform blanking for a long space. Therefore, the realization of a high-throughput beam recording apparatus with no loss of beam current has been desired.
- the problems to be solved by the present invention include the above-described problems as an example.
- the invention according to claim 1 is a recording apparatus that forms a latent image on the resist layer by irradiating the resist layer on the substrate with an exposure beam
- the drawing speed setting means for variably setting the drawing speed in forming the latent image
- the beam deflecting means for moving the irradiation position of the exposure beam relative to the substrate, and the moving speed of the substrate are adjusted.
- the invention according to claim 2 is characterized in that, in the configuration according to claim 1, the drawing speed is a speed in a circumferential direction or a radial direction of the substrate.
- the invention according to claim 11 generates a recording control signal for forming a latent image on the resist layer by irradiating the resist layer on the substrate with an exposure beam.
- the recording control signal generation device is a reference for controlling the deflection speed of the exposure beam so as to eliminate or reduce the irradiation blocking time to the resist layer of the exposure beam.
- a drawing speed setting means for variably setting the drawing speed, and a recording control signal for generating a recording control signal for changing the deflection speed of the exposure beam and the moving speed of the substrate in accordance with the change in the drawing speed. Control signal generator Having a stage.
- the invention according to claim 12 is the invention according to claim 11, wherein the drawing speed is a speed in a circumferential direction or a radial direction of the substrate.
- the invention according to claim 13 is the invention according to claim 11, wherein the recording control signal includes a beam deflection control signal for moving an irradiation position of an exposure beam and a substrate for adjusting a movement speed of the movement of the substrate. And a speed control signal.
- the invention of claim 20 variably sets a drawing speed in forming a latent image to be formed by drawing an electron beam on a resist layer on the substrate while moving the substrate.
- a drawing speed setting step a beam deflection step for moving the irradiation position of the exposure beam relative to the substrate, a substrate speed adjustment step for adjusting the moving speed of the substrate, a deflection speed of the exposure beam, And a control step of changing the moving speed of the substrate in accordance with the change of the drawing speed, a latent image forming step of forming a latent image on the resist layer, and transferring the latent image to have an uneven shape.
- a transfer mold forming step for forming a transfer mold.
- the invention of claim 21 variably sets a drawing speed in forming a latent image to be formed by drawing an electron beam on a resist layer on the substrate while moving the substrate.
- a drawing speed setting step a beam deflection step for moving the irradiation position of the exposure beam, a substrate speed adjustment step for adjusting the movement speed of the substrate, the deflection speed of the exposure beam, and the movement speed of the substrate
- a latent image forming step for forming a latent image on the resist layer, and transferring the latent image to form a transfer mold having an uneven shape.
- a transfer mold forming step is forming a drawing speed setting step, a beam deflection step for moving the irradiation position of the exposure beam, a substrate speed adjustment step for adjusting the movement speed of the substrate, the deflection speed of the exposure beam, and the movement speed of the substrate.
- the invention of claim 22 variably sets a drawing speed in forming a latent image to be formed by drawing an electron beam on a resist layer on the substrate while moving the substrate.
- a drawing speed setting step a beam deflection step for moving the irradiation position of the exposure beam, a substrate speed adjustment step for adjusting the movement speed of the substrate, the deflection speed of the exposure beam, and the movement speed of the substrate
- a latent image forming step for forming a latent image on the resist layer, and transferring the latent image to form a transfer mold having an uneven shape.
- Transfer mold formation A transfer step of pressing the transfer mold to transfer the concavo-convex shape onto a base substrate for a magnetic recording medium; and a transfer product forming step of peeling the transfer mold to form a transfer product having the concavo-convex shape
- the magnetic disk is manufactured by a method for manufacturing a magnetic disk.
- FIG. 1 is a block diagram schematically showing the configuration of the recording apparatus (electron beam recording apparatus) of the present embodiment.
- This embodiment is an embodiment in which the present invention is applied to a disk mastering apparatus that uses an electron beam to produce a master for manufacturing an optical disk.
- an electron beam recording apparatus 10 includes a vacuum chamber 11, a turntable 16 disposed in the vacuum chamber 11, and a resist applied to the surface placed on the turntable 16.
- a substrate 15 for the master disc a spindle motor 17 that rotationally drives the turntable 16 around the vertical axis of the main surface of the disc substrate, and a feed stage (hereinafter referred to as an X stage) 18 provided with the spindle motor 17 at the top, It has an electron beam column 20 attached to the vacuum chamber 11 and a controller 30! /.
- the vacuum chamber 11 is installed via a vibration isolator (not shown) such as an air damper, and transmission of vibration from the outside is suppressed.
- the vacuum chamber 11 is connected to a vacuum pump (not shown), and the interior of the vacuum chamber 11 is set to a vacuum atmosphere at a predetermined pressure by evacuating the chamber. Yes.
- the vacuum chamber 11 is provided with a light source 36A for detecting the height of the surface of the substrate 15, and a photodetector 36B including, for example, a position sensor, a CCD (Charge Coupled Device), and the like. (Detailed functions will be described later).
- the turntable 16 also has a dielectric, for example, ceramic force, and has an electrostatic chucking mechanism (not shown).
- a powerful electrostatic chucking mechanism includes a turntable 16 (ceramic) and an electrode provided in the turntable 16 and having a conductive force for causing electrostatic polarization.
- a high voltage power source (not shown) is connected to the electrode, and the substrate 15 is held by suction by applying a voltage from the high voltage power source to the electrode.
- the X stage 18 is coupled to a feed motor 19 which is a transfer (translational drive) device, and is connected to a spindle.
- the motor 17 and the turntable 16 can be moved in a predetermined direction (x direction) in a plane parallel to the main surface of the substrate 15.
- the stage 18 and the spindle motor 17 and the turntable 16 can be used to move the X ⁇ stage. Is configured.
- a reflecting mirror 35 A which is a part of the laser interference system 35, is disposed on the X stage 18.
- the laser interference system 35 measures the distance to the X stage 18 using the reflected light from the reflector 35A by the distance measuring laser beam from a light source (not shown), and the distance measurement data, that is, the X stage 18 Send feed (X direction) position data to stage drive unit 37.
- a rotation signal of the spindle motor 17 is also sent to the stage drive unit 37.
- the rotation signal includes a rotation synchronization signal indicating the reference rotation position of the substrate 15 and a pulse signal for each predetermined rotation angle from the reference rotation position.
- the stage drive unit 37 obtains the rotation angle, rotation speed, rotation frequency, and the like of the substrate 15 from the rotation signal.
- the stage drive unit 37 is position data representing the position of the electron beam spot on the substrate based on the feed position data from the X stage 18 and the rotation signal from the spindle motor 17 obtained as described above. Is supplied to the controller 30.
- the controller 30 outputs a control signal to the stage drive unit 37 based on this position data, and the stage drive unit 37 drives the spindle motor 17 and the feed motor 19 based on the control signal from the controller 30. That is, the controller 30 controls the rotation angle X of the turntable 16 (that is, the substrate 15) and the feed amount force stage drive unit 37 of the stage 18 which are the drive amounts of the spindle motor 17 and the stage 18.
- stage driving unit 37 drives the XY system stage to control the X and Y positions of the beam spot. Constructed, ok.
- an electron gun (emitter) 21 for emitting an electron beam for emitting an electron beam
- a converging lens 22 for converging the emitted electron beam for converging the emitted electron beam
- a blanking electrode 23 for converging the emitted electron beam
- a blanking electrode 23 for converging the emitted electron beam
- a blanking electrode 23 for blanking the emitted electron beam
- the focus lens 27 and the objective lens 28 are arranged in this order, and further include a alignment electrode for correcting the position of the electron beam based on the beam position correction signal from the controller 30.
- the electron gun 21 is a cathode to which a high voltage supplied from an acceleration high-voltage power supply (not shown) is applied.
- An electron beam (EB) accelerated to several lOKeV by (not shown) is emitted.
- the blanking electrode 23 performs on-Z-off switching (ONZOFF) of the electron beam based on the modulation signal from the blanking control unit 31 controlled by the control signal from the controller 30. That is, by applying a voltage between the blanking electrodes 23 to greatly deflect the passing electron beam, the electron beam can be prevented from passing through the aperture 24 and the electron beam can be turned off.
- ONZOFF on-Z-off switching
- the beam deflection electrode 25 performs deflection control of the electron beam at high speed based on a control signal from the beam deflection unit 33 (beam deflection means) controlled by a control signal from the controller 30. With this deflection control, the position of the electron beam spot relative to the substrate 15 is controlled.
- the focus lens 27 is driven based on a drive signal of a focus control unit 34 force controlled by a control signal from the controller 30, and focus control of the electron beam is performed.
- a detection signal from the height detection unit 36 is input to the focus control unit 34. That is, the photodetector 36B receives the light beam emitted from the light source 36A and reflected by the surface of the substrate 15, and supplies the received light signal to the height detector 36.
- the height detection unit 36 detects the height of the surface of the substrate 15 based on the received light signal and generates a detection signal, and the focus control unit 34 performs focus control of the electron beam based on the detection signal.
- the controller 30 is supplied with information data (recording data) RD to be recorded.
- the recording data RD is modulation data used for disk recording, for example, modulation data by 8Z16 modulation for a DVD disk.
- the controller 30 Based on the recording data RD, the feed position data, and the rotation position data, the controller 30 sends blanking control signals SB and SB to the blanking control unit 31, the beam deflection unit 33, and the focus control unit 34, respectively.
- a deflection control signal SD (a signal from an adder 46 to be described later and a signal from a feed driving unit 37B) and a focus control signal SF are sent to perform recording (exposure or drawing) control. That is, the resist on the substrate 15 is irradiated with an electron beam based on the recording data, and a latent image corresponding to the recording pit is formed only at a portion exposed by the electron beam irradiation, and recording is performed.
- blanking control unit 31, beam deflection unit 33, focus control Forces shown for main signal lines with respect to the unit 34 and the stage drive unit 37 These components are both connected to the controller 30 and configured to be able to transmit and receive necessary signals.
- the controller 30 divides the recording section into a plurality of predetermined sections, and before executing the recording of the recording data RD, the controller 30 sets an optimum drawing speed corresponding to the desired purpose and operation mode for each divided section.
- the recording control is performed by changing the deflection speed and the substrate speed for each section according to the drawing speed.
- FIG. 2 is a functional block diagram showing an example of a detailed configuration of a part of the controller 30 that performs beam deflection control and substrate 15 position control.
- the controller 30 includes a deflection substrate speed signal generator 41 (control means) that generates a beam deflection signal and a substrate speed signal, a deflection amount corrector 45, an adder 46, and an optimum speed generator 47. (Rendering speed setting means).
- the stage drive unit 37 is provided with a substrate speed change and a rotation drive unit 37A and a feed drive unit 37B as substrate speed adjusting means.
- the optimum velocity generator 47 generates each drawing point (recording section) based on the recording data RD input via a predetermined operation means (or other external device) (not shown) provided in the electron beam recording apparatus 10. ) Is calculated and the corresponding signal is output.
- the optimum speed generator 47 is, for example, a resist It corresponds to various lithography conditions such as sensitivity, layer thickness, ambient temperature, etc., or recording conditions such as pit width and track pitch, and is set with a certain width so that appropriate pit recording can be performed.
- the target value for example, the beam deflection angle is zero (corresponding to the state where the beam is incident perpendicularly to the disk).
- the deflection / substrate speed signal generator 41 includes a low-pass filter (not shown). This low-pass filter extracts the components below the predetermined high-frequency cutoff frequency fc (details will be described later) corresponding to the mechanical tracking limit of the X ⁇ stage system from the signal that is the base of the substrate velocity signal Vsub.
- the substrate speed signal Vsub is supplied to the substrate speed converter 38 in the stage drive unit 37.
- a band pass filter (BPF) or the like can be used instead of the low pass filter.
- the substrate speed change 38 decomposes the substrate speed signal Vsub into a ⁇ component and an X component, and supplies them to the rotation drive unit 37A and the feed (X direction) drive unit 37B, respectively.
- the rotation drive unit 37A and the feed drive unit 37B correspond to the fact that the X ⁇ stage system including the spindle motor 17 and the X stage 18 has a mechanical tracking limit as described above, and the substrate speed of the substrate 15
- the spindle motor 17 and the X stage 18 are driven using a predetermined frequency component of the ⁇ component and the X component of the signal Vsub. This will be explained in detail with reference to FIG.
- FIG. 3 is an explanatory diagram schematically showing the tracking frequency band of the 0 stage and the X stage, the pass frequency band of the low pass filter (LPF), and the frequency band for performing the recording operation.
- LPF low pass filter
- the tracking limit frequencies of the 0 stage and the X stage are represented by fl and f 2, respectively, and the high-frequency cutoff frequency of the low-pass filter is represented by fc.
- the X ⁇ stage system can follow mechanically.
- the rotation drive unit 37A and the feed drive unit 37B drive the spindle motor 17 and the X stage 18 out of the ⁇ component and the X component of the substrate speed signal Vsub of the substrate 15, so as to drive the limit frequency. Extract the rotation component ( ⁇ 0) and feed component (X0) of frequencies below fl and f 2 respectively.
- the rotation component ( ⁇ 0) and the feed component (X0) of the frequency below the ⁇ component and the X component limit frequency fl, f2 of the substrate velocity signal Vsub of the substrate 15 extracted as described above. Is supplied to the spindle motor 17 and the feed motor 19 from the rotation drive unit 37A and the feed drive unit 37B.
- the rotation component ( ⁇ 1) and feed component (XI), which are residuals exceeding the above limit frequencies (fl, f2) are sent from the rotation drive unit 37A to the deflection amount corrector 45 or feed drive.
- the beam is supplied from the unit 37B to the beam deflection unit 33, respectively.
- the deflection amount corrector 45 generates a deflection amount in accordance with the rotation direction residual component ( ⁇ 1) and the radial position of the substrate speed signal Vsub, and outputs it to the adder 46.
- the adder 46 adds the beam deflection signal Vbeam supplied from the deflection / substrate velocity signal generator 41 and the correction signal from the deflection amount corrector 45, and supplies the result to the beam deflection unit 33. .
- the residual error of the operating band is narrowed and the mechanical system (X ⁇ stage system) is added to the beam deflection signal Vbeam by feedforward, and is corrected by the deflection of the beam.
- the frequency above the cut-off frequency (fc) of the low-pass filter (LPF) is used for pit recording.
- FIGS. 4 (a) and 4 (b) are diagrams showing the basic principle behind the present embodiment.
- the drawing speed Vexp from the optimum speed generator 47 is constant.
- the amount of deflection of the electron beam (EB) when performing electron beam drawing under the conditions where the substrate velocity Vsub output from the substrate velocity signal generator 41 is constant. It is explanatory drawing which showed typically.
- the electron beam column 20 is shown to move relative to the movement of the substrate, and the deflection amount of the electron beam is exaggerated.
- FIG. 4 (a) and FIG. 4 (b) when moving to the left in the figure at the substrate speed Vsub, as described above, the electron beam (EB) for recording each pit is recorded as described above.
- the deflection is controlled by the substrate speed signal generator 41. Also, in the space, V is not deflected, and high-speed deflection is performed so that the beam is immediately advanced to the recording position of the next pit without blanking the electron beam.
- FIG. 4 (a) shows that the pits of the recording data (modulation data) are dense (pit duty).
- An example in the case of recording a pit pattern with a large ratio) is shown.
- the electron beam column 20 moves from the relative position A1 to the relative position A2. Since the duty ratio of the pit is large, the recording position shifts backward (moving direction of the substrate 15) with respect to the column position.
- the beam deflection amount Vbeam is 1 Dl
- the deflection angle is a 1 It becomes.
- the beam deflection amount Vbeam and the deflection angle a are defined with reference to a predetermined irradiation position, for example, with respect to a position where the beam is irradiated perpendicularly to the substrate.
- FIG. 4 (b) shows an example of recording a pit pattern in which the pits of the recording data are sparse (pit duty ratio is small).
- the column position moves from A1 to A2
- the recording position shifts forward (opposite to the movement of the substrate 15) with respect to the column position
- the beam deflection amount at the recording position P2 is + D2
- the deflection angle is ⁇ 2.
- the deflection amount (Dl, D2) increases, the deflection angle of the beam with respect to the substrate increases, and the beam convergence characteristics such as increase and deformation of the beam spot diameter decrease, and the recording accuracy may decrease. is there.
- FIGS. 5A and 5B are diagrams schematically illustrating the basic behavior of the recording control of the present embodiment.
- FIG. 6 is an explanatory diagram schematically showing the deflection amount of an electron beam (EB) when electron beam drawing is performed in R2 and R3.
- Fig. 5 (a) shows the case where the duty ratio of the pit is smaller than the predetermined value (pit is sparse) in the recording section R2 (when the ratio of the pit portion to the space in the section is less than the predetermined value). Showing
- the recording section R2 in which the duty ratio of the pit is relatively small ( outside the predetermined range) ,
- FIG. 5 is an explanatory diagram schematically showing the amount of deflection of an electron beam (EB) when electron beam writing is performed in R5 and R6.
- EB electron beam
- the drawing thickness increases in the radial direction of the substrate 15.
- FIG. 6 (a) and 6 (b) show an example in which the line width is increased in order to perform the above correction.
- Fig. 6 (b) shows continuous recording sections R7 to R9 (the above lines).
- FIG. 6 (a) is an explanatory view schematically showing the track of the substrate 15 in the recording section R8 (in which the width is increased).
- FIG. 6 (a) is indicated by an arrow a in FIG. 6 (b) of the section R7 to R9.
- FIG. 6 is an explanatory diagram schematically showing the amount of deflection of an electron beam (EB) when performing electron beam writing on a track.
- EB electron beam
- Vsubl—Vbea ml Vexpl, which is slower than the recording interval R7, and for the track indicated by arrow a, As illustrated, the drawing thickness increases in the radial direction of the substrate 15.
- FIG. 7 shows the control executed by the deflection / substrate velocity signal generator 41 and the optimum velocity generator 47 of the controller 30 in order to execute the operations described in FIGS. 6 (a) and 6 (b). It is a flowchart showing a procedure.
- the recording operation is started with the drawing speed Vexp, electron beam (EB) deflection speed Vbeam, and substrate speed Vsub at each drawing point (recording section). It is set in advance.
- step S5 the optimum velocity generator 47 and the deflection / substrate velocity signal generator 41 input the recording data RD from a predetermined operating means (or other external device) as shown above as described above. .
- step S10 the optimum velocity generator 47 sets the velocity to be set in the thick drawing region where the line width is increased in order to reduce the influence of backscattering (in the above example, the arrow a If the track is not in the recording section R8), it is determined whether it is a normal drawing area. If it is a normal drawing area, this determination is satisfied, and the routine goes to Step S15.
- step S15 the optimum speed generator 47 sets the drawing speed to normal Vexpl, and the process proceeds to step S20.
- step S20 the deflection / substrate velocity signal generator 41 determines that the pits of the recording data (modulation data) RD in the recording section are relatively dense (pit duty ratio) based on the input recording data RD. Is greater than a predetermined threshold). If the duty ratio is large, the process proceeds to step S25, and the substrate velocity signal generator 41 sets the substrate velocity Vsub and the deflection velocity Vbeam to normal Vsubl and Vbeaml, respectively. If the duty ratio is small, the process proceeds to step S30, and the substrate velocity signal generator 41 increases the substrate velocity Vsub and the deflection velocity Vbeam by V ( ⁇ V> 0) to Vsubl + ⁇ V and Vbea ml +, respectively. Set each.
- step S10 the optimum velocity generator 47 uses the thick drawing region in which the line width is increased in order to reduce the influence of backscattering in the region where the velocity is to be set (the above example). If the track indicated by the arrow a is in the recording section R8), the determination in step S10 is not satisfied, and the routine proceeds to step S40. In step S40, the optimum speed generator 47 sets the drawing speed to Vexpl ⁇ AVexp obtained by reducing AVexp ( ⁇ Vexp> 0) from the normal Vexpl, and the process proceeds to step S45.
- step S45 the deflection substrate velocity signal generator 41 sets the substrate velocity Vsub to normal Vsubl, and the deflection velocity Vbeam to Vbeaml + increased by AV (AV> 0). To do.
- step S25, step S30, and step S45 are completed as described above, the process proceeds to step S35, and the recording data input in step S5 by the deflection / substrate velocity signal generator 41 or the optimum velocity generator 47. Determine whether the speed setting for the corresponding recording section has been completed for all data in RD. Until all the data are completed, the determination in step S35 is not satisfied, and the process returns to step S10 and the same procedure is repeated. When the speed setting has been completed for all data, the determination in step S35 is satisfied, and this flow is terminated.
- the normal region In the flow of FIG. 7, only three types of classification are performed: the normal region, the region where the drawing speed Vexp is reduced to suppress the influence change of the backscattering, and the region where the duty is small.
- it is not limited to three types. That is, for example, it can be extended to areas where the drawing speed Vexp is increased to suppress the change in the influence of backscattering by changing the sign, or areas where the duty is larger than usual, etc. It can be extended to do.
- the recording apparatus 10 in the present embodiment irradiates the resist layer formed on the substrate 15 with the exposure beam EB corresponding to the recording signal while moving the substrate 15.
- the beam deflecting means (in this example, the beam deflecting unit 33) that moves the irradiation position of the exposure beam EB relative to the substrate 15 and the substrate 15 based on the deflection amount of the exposure beam EB by the beam deflecting means 33
- Substrate speed adjusting means in this example, rotation driving part 37A and feed driving part 37B of stage driving part 37
- the substrate 15 on which the resist layer is formed is moved, and the resist layer is irradiated with the exposure beam EB corresponding to the recording signal, thereby forming a latent image.
- the irradiation position of the exposure beam EB on the substrate 15 is moved by the deflection of the beam deflection means 33, and the circumferential movement speed Vsub of the substrate 15 is adjusted by the substrate speed adjustment means 37A, 37B based on the beam deflection amount.
- the control means 41 uses the drawing speed setting means 47 to change the circumferential deflection speed Vbeam of the exposure beam EB by the beam deflection means 33 and the circumferential movement speed Vsub of the substrate 15 by the substrate speed adjustment means 37A and 37B. It changes according to the circumferential drawing speed Vexp when forming a latent image that is variably set.
- the portion in which the circumferential distribution of the drawing pattern is relatively sparse is the circumferential movement speed Vsub of the substrate 15 and the exposure beam EB.
- Deflection speed in the direction Vbeam is relatively fast, and the circumferential distribution of the drawing pattern is relatively dense (in the example of Fig. 5 (a), the recording sections Rl and R3) move in the circumferential direction of the substrate 15
- the exposure blocking time of the exposure beam EB to the resist layer is reduced by relatively slowing the speed Vsu b and the deflection speed Vbeam in the circumferential direction of the exposure beam EB. ) Can be eliminated (or reduced).
- the control means 41 includes the exposure beam EB.
- the circumferential deflection speed Vbeam of the exposure beam EB by the beam deflection means 33 and the circumferential movement speed Vsub of the substrate by the substrate speed adjustment means 37A and 37B It is characterized by controlling either or both of these.
- the drawing speed setting means 47 sets the drawing speed Vexp in the circumferential direction in the normal drawing regions R1 to R3, R4, R5 to be substantially constant
- the control means 41 includes Among the normal drawing areas, the circumferential distribution of the drawing pattern in the sparse areas R2 and R5 in which the circumferential distribution of the drawing pattern is sparser (represented as “relatively” in this embodiment) than the predetermined condition.
- the moving speed Vsub is made relatively high, and the deflection speed Vbeam in the circumferential direction of the exposure beam EB by the beam deflecting means 33 is changed so as to be made relatively high.
- the drawing speed Vexp is substantially constant
- the circumferential movement speed Vsub of the substrate 15 and the circumferential deflection speed Vbeam of the exposure beam EB are substantially constant
- the circumferential distribution of the drawing pattern is relative.
- the movement of the substrate 15 in the circumferential direction is greater than in the dense regions Rl, R3, and R4.
- the blanking controller 31 controls the blanking speed while keeping the drawing speed Vexp substantially constant by relatively increasing the speed Vsub and relatively increasing the deflection speed Vbeam of the exposure beam EB in the circumferential direction. Can be eliminated (or reduced).
- the drawing speed setting means 47 uses the drawing pattern of the resist layer on the substrate 15 as compared with the other drawing regions R4 and R5 (normal drawing regions).
- the drawing speed Vexp in the circumferential direction in the thick drawing area R6 to be thickened in the radial direction is set slower than the drawing speed Vexp in the circumferential direction in the other drawing areas R4 and R5.
- the drawing speed setting means 47 is a dense region (FIG. 6) in which the radial distribution of the drawing pattern is denser than the predetermined condition in the resist layer on the substrate 15.
- the circumferential drawing speed Vexp in the recording section R7, R9) is set relatively fast, and the radial distribution of the drawing pattern in the resist layer on the substrate 15 is the predetermined condition.
- the drawing speed Vexp in the circumferential direction in the sparse area that is less sparse (the recording section R8 in the examples in Figs. 6 (a) and 6 (b)) is set to be relatively slow.
- a recording control signal generation device (so-called formatter) 100 is connected to the video recording device and generates and inputs a control signal for forming a latent image in the electron beam recording device.
- the recording signal generating apparatus 100 includes a beam deflecting unit 33 that relatively moves the irradiation position of the exposure beam EB with respect to the substrate 15 on which the resist layer is formed, and the beam deflecting unit.
- the substrate speed adjusting means in this example, the rotation driving unit 37A and the feed driving unit 37B for adjusting the circumferential movement speed Vsub of the substrate, and the substrate speed adjusting means 37A, 37B Recording that forms a latent image on the resist layer by irradiating the resist layer with the exposure beam EB whose irradiation position is moved by the beam deflecting means 33 while moving the substrate 15 at the circumferential movement speed Vsub adjusted in
- a recording control signal generation device 100 for generating a control signal for forming a latent image for the apparatus, the recording signal RD
- the beam deflecting means 33 serves as a reference for controlling the circumferential deflection velocity Vbeam of the exposure beam EB so as
- Drawing speed setting means (optimum speed generator 47 in this example) that variably sets the circumferential drawing speed Vexp in formation, and the circumferential deflection speed Vbeam of the exposure beam EB by the beam deflection means 33 according to the recording signal RD Further, the beam deflection means 33 and the substrate speed adjustment means 37A, which change the circumferential movement speed Vsub of the substrate 15 by the substrate speed adjustment means 37A and 37B in response to the change of the circumferential drawing speed Vexp. It has a deflection 'substrate speed setting means (in this example, deflection' substrate speed signal generator 41) for generating a control signal to 37B.
- deflection 'substrate speed setting means in this example, deflection' substrate speed signal generator 41
- the recording control signal generating apparatus 100 includes a deflection / substrate speed setting means 41 and a drawing speed setting means 47, and the deflection / substrate speed setting means 41 is used for the exposure beam EB by the beam deflection means 33.
- the moving speed Vsub of the substrate 15 by the deflection speed Vbeam and the substrate speed adjusting means 37A, 37B is changed in accordance with the drawing speed Vexp at the time of forming the latent image variably set by the drawing speed setting means 47.
- the moving speed Vsub in the circumferential direction of the substrate 15 and the deflection speed Vbeam in the circumferential direction of the exposure beam EB are relatively increased, and the drawing pattern
- the portions Rl and R3 having a relatively dense distribution in the circumferential direction can be obtained by relatively slowing the movement speed Vsub in the circumferential direction of the substrate 15 and the deflection speed Vbeam in the circumferential direction of the exposure beam EB. It is possible to eliminate (or reduce) the time to shut off the layer.
- the deflection / substrate speed setting means 41 eliminates (or reduces) the irradiation interruption time by making the substrate movement speed Vsub and the exposure beam deflection speed Vbeam increase / decrease ⁇ V substantially the same.
- the drawing speed setting means 47 of the recording control signal generator 100 is used to set the drawing speed in the circumferential direction.
- the moving speed Vsub on the substrate 15 side is relatively slower than when the drawing speed Vexp is substantially constant, Elimination of exposure beam irradiation interruption time (or Can be drawn with a large reduction.
- the drawing speed setting means 47 sets the drawing speed Vexp in the circumferential direction in the normal drawing regions R1 to R3, R4, R5 to be substantially constant, and the deflection substrate speed setting means.
- 41 is a sparse region R2, R5 in which the circumferential distribution of the drawing pattern is sparser than the predetermined condition in the normal drawing region, and the dense region Rl in which the circumferential distribution of the drawing pattern is denser than the predetermined condition.
- the substrate speed adjustment means 37A, 37B moves the substrate 15 in the circumferential direction relatively faster Vsub, and the beam deflection means 33 deflects the exposure beam EB in the circumferential direction Vbeam. It is characterized by changing so as to be relatively fast.
- the deflection / substrate speed setting means 41 has a higher density in the regions R2 and R5 where the circumferential distribution of the drawing pattern is relatively sparse than in the dense regions Rl, R3, and R4.
- Blanking is performed while maintaining the drawing speed Vexp substantially constant by making the moving speed Vsub in the circumferential direction of the substrate 15 relatively fast and the deflection speed Vbeam in the circumferential direction of the exposure beam EB relatively fast. Can be eliminated (or reduced).
- the drawing speed setting means 47 uses the drawing pattern of the resist layer on the substrate 15 in the radial direction more than the other drawing regions R4 and R5 (normal drawing regions).
- the drawing speed Vexp in the circumferential direction in the thick drawing area R6 to be formed thickly is set slower than the drawing speed Vexp in the circumferential direction in the other drawing areas R4 and R5.
- the drawing speed setting means 47 has a drawing pattern radial distribution that is denser than a predetermined condition in the resist layer on the substrate 15 (in this embodiment, “ In the dense regions R7 and R9, which are expressed as “relatively dense”, the circumferential drawing speed Vexp is set relatively fast, and the radial distribution of the drawing pattern in the resist layer on the substrate 15 is The drawing speed Vexp in the circumferential direction in the sparse region R8 that is sparse (represented as “relatively sparse” in this embodiment!) Is set to be relatively slower than the predetermined condition.
- the number of drawing patterns in the radial direction distribution is smaller in the region where the radial distribution of the drawing patterns is relatively sparse than the region in which the other drawing pattern distribution is dense.
- track b of FIG. 9 when there is a track in which a drawing pattern is not distributed in a sparse region, it may be necessary to perform blanking by the blanking control unit 31 at that location as it is.
- the moving speed Vs ub of the substrate 15 shown in FIG. 5 (a) is increased ( ⁇ Vsub + AV) and the radial deflection speed Vbeam of the electron beam EB is set to this.
- Corresponding increase ( ⁇ Vbeam + AV) method also exceeds the deflection limit of the electron beam EB (it swings out), so it cannot be covered, and blanking must be performed. And the track b for blanking are repeated alternately, and the beam current is wasted.
- FIG. 11 is a flowchart showing a control procedure executed by the deflection / substrate speed signal generator 41 and the optimum speed generator 47 of the controller 30 in order to execute the operation described in FIG. .
- the same steps as those in Fig. 7 are given the same reference numerals.
- the drawing speed Vexp, the electron beam (EB) deflection speed Vbeam, and the substrate speed Vsub for each drawing point (recording section) are It is set in advance before the start of the recording operation.
- a flag FN and a flag FS which will be described later, are set to an initial value 0 in advance before the start of this flow.
- step S5 the optimum velocity generator 47 and the deflection / substrate velocity signal generator 41 input the recording data RD from the predetermined operation means (or other external device) not shown as described above.
- step S7 the optimum speed generator 47 uses this force to determine whether the recording section in which the speed is set is a space without drawing data (or whether the duty is smaller than a predetermined value). It is determined whether the flag FS indicating 1 is good. Initially, the flag FS is initialized to 0, so this determination is not satisfied, and the process moves to step S9.
- Steps S15 to S30 are the same as in FIG. 7.
- the deflection • substrate speed signal generation is performed in step S20.
- the device 41 determines whether the duty ratio of the pits of the recording data (modulation data) RD is larger than a predetermined threshold! /, Value. If the duty ratio is large, the substrate velocity signal generator 41 sets the substrate velocity Vsub and the deflection velocity Vbeam to normal Vsubl and Vbeaml in step S25, and if the duty ratio is small, step S30! Vsubl + Set to AV and Vbeaml + respectively.
- step S35 the deflection / substrate velocity signal generator 41 or the optimum velocity generator 47 finishes setting the velocity of the corresponding recording interval for all the recording data RD input in step S5 above. Judge whether or not the force is. When the speed setting has been completed for all data, the determination in step S35 is satisfied, and this flow is terminated. Until all the data is completed, the determination in step S35 is not satisfied, and the process returns to step S7 and the same procedure is repeated.
- the control means 41 is an area of the dies layer of the substrate 15 in which the radial distribution of the drawing pattern is relatively sparse (in this example, the recording sections R10, R12). ),
- the beam deflection means 33 is controlled so that a latent image is formed by dividing the same drawing pattern into a plurality of times (in this example, n times), and the drawing speed is set.
- Means 47 performs latent formation by dividing the same drawing pattern into a plurality of times. For a part (regions RIO, R12), the circumferential drawing speed Vexp is set according to the number n of latent image formations. It is characterized by that.
- the track where the drawing pattern is distributed is used as the part where multiple latent images are formed.
- the exposure beam EB force S approaches the track where the drawing pattern is not distributed! /
- the exposure beam EB is deflected radially to the track where the pattern is distributed to form the latent image n times.
- the drawing returns to the original track b 'and the drawing is continued.
- the latent image is formed by moving to another track separated in the radial direction so that blanking by the blanking control unit 31 is not performed. This can improve throughput.
- the circumferential drawing speed Vexp can be set relatively fast on the premise of the multiple formation. As a result, more efficient work can be performed.
- a recording control signal generation device (formatter) 100 uses the deflection • substrate speed setting means 41 for at least one of the regions RIO and R12 in the resist layer on the substrate 15 where the radial distribution of the drawing pattern is relatively sparse.
- the beam deflection means 33 is formed so that the same drawing pattern is divided into a plurality of times and a latent image is formed.
- the drawing speed setting means 47 divides the same drawing pattern into a plurality of times to form latent areas (regions RIO, R12) according to the number n of latent image formations. It is characterized by setting the drawing speed Vexp in the direction.
- the deflection 'substrate speed setting means 41 is exposed to the track where the drawing pattern is not distributed as a part where multiple latent images are formed! /
- the latent image was formed n times by deflecting the exposure beam EB in the radial direction to the track where the drawing pattern is distributed, and when this part is completed, the original track! Return to / to continue drawing.
- the drawing speed setting means 47 can set the circumferential drawing speed Vexp relatively fast on the premise of the multiple formation. As a result, more efficient work can be performed.
- Fig. 12 (a) is a top view schematically showing the drawing pattern of the track in this variation
- Fig. 12 (b) is an enlarged view of the portion A in the figure
- Fig. 12 (c) is a diagram. It is the figure which looked at the side force of the behavior of 12 (a).
- Vexp Vexp 1 as an area for forming a single latent image.
- Drawing speed for each section Vexpl, Vexp2, Vexp 3 may be set equal to each other, but as described above, for example, it corresponds to various lithography conditions such as resist sensitivity, layer thickness, and environmental temperature, or recording conditions such as pit width and track pitch,
- the optimum speed generator 47 may be set to different values to ensure proper pit recording.
- FIGS. 13 (a) and 13 (b) show an example of such a modification
- FIG. 13 (b) schematically shows a track on the substrate 15 including recording sections R30 to R32 that are continuous in the radial direction
- FIG. 13A is an explanatory diagram schematically showing the amount of deflection of the electron beam (EB) at the time of electron beam writing in the sections R30 to R32.
- the radial distribution of a substantially annular track is not uniform, and the distribution in the radial direction is desired, the radial distribution of the track is sparse.
- the recording interval R31 is a case where the radial movement speed Usub and the radial drawing speed Uexp of the substrate 15 are relatively increased, and the track radial distribution is dense (in this example, the recording interval R30, In R32), the radial movement speed Usub and the radial drawing speed Uexp of the substrate 15 must be relatively slow.
- the portion that cannot be followed (recording section R3 la, R32a) is optimally covered by deflecting the electron beam EB with the beam deflection section 33 (deflection amount X, deflection speed Ubeam). Increase / decrease switching of the radial drawing speed Uexp set by the speed generator 47 can be performed accurately and clearly.
- FIG. 14 is executed by the deflection / substrate velocity signal generator 41 and the optimum velocity generator 47 of the controller 30 in order to execute the operation described in FIGS. 13 (a) and 13 (b). It is a flowchart showing a control procedure.
- the drawing speed Uexp, electron beam (EB) deflection speed Ubeam, and substrate speed Usub for each drawing point (recording section) are preliminarily set before starting the recording operation based on the recording data RD. It is to set.
- step S105 as in step S5 described above, the optimum speed generator 47 and the deflection / substrate speed signal generator 41 are not shown as described above. From predetermined operating means (or other external device) Input recording data RD.
- step S110 the optimum speed generator 47 is to set the speed to be set from now on, for example, the area in which the radial distribution of the substantially annular track is relatively sparse (the example described above). Then, it is determined whether it is a normal drawing area (recording section R30, R32 in the above example), not a recording section (R31). If it is a normal drawing area, this determination is satisfied, and the routine goes to Step S115.
- step S115 the optimum speed generator 47 sets the drawing speed to normal Uexp 1, and proceeds to step S125.
- step S 125 the substrate velocity signal Usub and the substrate velocity Usub and the deflection velocity Ubeam are set to normal Usub 1 and Ubeam 1, respectively.
- the region in which the optimum speed generator 47 is going to set the speed is a region in which, for example, the radial distribution of the substantially annular track is relatively sparse (described above) In the case of the recording section R31), the determination at step S110 is not satisfied, and the routine goes to step S140.
- step S140 the optimum speed generator 47 sets the drawing speed to Uexpl + AUexp obtained by increasing the drawing speed by AUexp ( ⁇ Uexp> 0) from the normal Uexpl, and then proceeds to step S145.
- step S145 the deflection 'substrate velocity signal generator 41 sets the deflection velocity Ubeam to the normal Ubeaml and increases the substrate velocity Usub! /, By ( ⁇ > 0). Set to Usubl +.
- step S150 the deflection's substrate velocity signal generator 41 is the region where the velocity is to be set from now on, the region where the radial distribution of the track is relatively sparse (the example described above)
- step S155 the optimum velocity generator 47 performs a predetermined correction for covering the mechanical response delay with respect to the deflection velocity Ubeam set in step S145.
- step S125, step S150, and step S155 are completed as described above, the process proceeds to step S135, and the deflection / substrate speed signal generator 41 or the optimum speed generator 47 is input in step S105.
- Recorded data For all data in RD, determine whether or not the force has been set for the speed of the corresponding recording interval. Until all the data is completed, the determination in step S135 is not satisfied, and the process returns to step S110 and the same procedure is repeated. When the speed setting is completed for all the data, the determination in step S135 is satisfied, and this flow is finished.
- the normal region and the region in which the drawing speed Uexp is increased because the radial distribution of the substantially annular track is relatively sparse are divided into two types. Not limited to two types. That is, for example, by changing the sign, substantially annular It can be extended to a region where the radial distribution of the track is relatively dense, and further, it can be extended so as to be continuously performed in multiple steps depending on the extent.
- the latent image is applied to the resist layer by irradiating the resist layer formed on the substrate 15 with the exposure beam EB corresponding to the recording signal while moving the substrate 15.
- a drawing speed setting means in this example, an optimum speed generator 47 that variably sets a radial drawing speed Uexp in forming a latent image, and exposure relative to the substrate 15.
- Beam deflection means 33 for moving the irradiation position of the beam EB, substrate speed adjustment means 37A, 37B for adjusting the radial movement speed of the substrate 15 based on the deflection amount of the exposure beam EB by the beam deflection means 33, and beam deflection Control for changing the radial deflection speed Ubeam of the exposure beam EB by means 33 and the radial movement speed Usub of the substrate 15 by the substrate speed adjusting means 37A, 37B in accordance with the change of the radial drawing speed Uexp.
- Means 41 and Characterized in that it has.
- the radial drawing speed Uexp is set relatively high, and the substrate 15
- the radial moving speed Usub is made relatively fast, and the portion where the radial distribution of the substantially annular track is relatively dense (in the above example, the recording sections R30 and R32) is set to the radial drawing speed Uexp. It is possible to eliminate (or reduce) the irradiation blocking time of the exposure beam EB to the resist layer by setting the substrate relatively slow and relatively slowing the moving speed Usub in the radial direction of the substrate 15.
- control means 41 is configured so that the exposure beam EB radial direction of the exposure beam EB by the beam deflecting means 33 is eliminated so as to eliminate or reduce the irradiation blocking time of the exposure beam EB to the resist layer. It is characterized by controlling either or both of the deflection speed Ubeam and the radial movement speed Usub of the substrate by the substrate speed adjusting means 37A and 37B.
- the drawing speed setting unit 47 has a radial distribution of a substantially annular track for forming a latent image in the resist layer on the substrate 15 that is more than the predetermined condition ( In this embodiment, it is expressed as “relatively”, and the sparse region R31 is sparse.
- the radial drawing speed Uexp is set relatively faster than the dense regions R30 and R32 in which the radial distribution of the substantially annular track is denser than the predetermined condition.
- the substrate speed is adjusted compared to the dense regions R30 and R32 in which the radial distribution of the substantially annular track is denser than the predetermined condition. It is characterized in that the moving speed Usub in the radial direction of the substrate 15 by means 37A, 37B is changed so as to be relatively fast.
- control means 41 is configured so that when the movement speed Usub in the radial direction of the substrate 15 by the substrate speed adjustment means 37A, 37B changes, the movement speed Usub is changed.
- the radial deflection speed Ubeam of the exposure beam EB by the beam deflecting means 33 is changed corresponding to the mechanical response delay with respect to the change.
- a recording control signal generation device (formatter) 100 as shown in FIG. 8 can be configured.
- the recording control signal generating apparatus 100 includes a beam deflecting means 33 for moving the irradiation position of the exposure beam EB relative to the substrate 15 having the resist layer formed thereon, and the beam deflecting means 33.
- Substrate speed adjusting means 37A, 37B for adjusting the radial movement speed Usub of the substrate 15 based on the deflection amount of the exposure beam EB and the substrate 15 at the radial movement speed Usub adjusted by the substrate speed adjusting means 37A, 37B.
- Control for forming a latent image for a recording device that forms a latent image on the resist layer by irradiating the resist layer with the exposure beam EB whose irradiation position is moved by the beam deflection means 33 while moving A recording control signal generation device 100 for generating a signal, wherein the recording signal R Depending on D, the beam deflecting means 33 serves as a reference for controlling the radial deflection speed Ubeam of the exposure beam EB so as to eliminate or reduce the exposure blocking time of the exposure beam EB to the resist layer.
- the drawing speed setting means 47 for variably setting the direction drawing speed Uexp in formation, and the radial deflection speed Ubeanu of the exposure beam EB by the beam deflecting means 33 and the substrate by the substrate speed adjusting means 37A, 37B according to the recording signal RD
- the deflection direction which generates a control signal to the beam deflection means 33 and the substrate speed adjustment means 37A, 37B so that the radial movement speed Usub of 15 is changed in accordance with the change of the radial drawing speed Uexp.
- setting means 41 for variably setting the direction drawing speed Uexp in formation, and the radial deflection speed Ubeanu of the exposure beam EB by the beam deflecting means 33 and the substrate by the substrate speed adjusting means 37A, 37B according to the recording signal RD
- the deflection direction which generates a control signal to the beam deflection means 33 and the substrate speed adjustment means 37A, 37B so that the radial movement speed Usub of 15 is changed in accordance with the change of the
- the portion R31 in which the radial distribution of the substantially annular track is relatively sparse is relatively increased in the radial drawing speed Uexp by the drawing speed setting means 47 of the recording control signal generation device 100.
- Setting and deflection 'substrate speed setting means 41 makes the radial movement speed Usub of the substrate 15 relatively high, and the radial distribution of the substantially annular track is relatively dense.
- the drawing speed setting means 47 of the signal generator 100 sets the drawing speed Uexp in the radial direction relatively slow, and the deflection'substrate speed setting means 41 sets the radial movement speed Usub of the substrate 15 relatively slow.
- the drawing speed setting means 47 has a radial distribution of a substantially annular track for forming a latent image in the resist layer on the substrate 15 less than the predetermined condition.
- the radial drawing speed Uexp is set relatively high compared to the dense regions R30 and R32 in which the radial distribution of the substantially annular track is denser than the above-mentioned predetermined condition.
- the substrate speed setting means 41 is a dense region where the radial distribution of the substantially annular track is denser than the predetermined condition.
- the moving speed Usub in the radial direction of the substrate 15 by the substrate speed adjusting means 37A and 37B is changed to be relatively high.
- the deflection / substrate speed setting means 41 and the drawing speed setting means 47 respectively.
- the radial moving speed Usub and radial drawing speed Uexp of the substrate 15 are relatively increased.
- the radial distribution of the track can be made sparse, and conversely, the radial distribution of the track is made dense by relatively slowing the radial movement speed Usub and the radial drawing speed Uexp of the substrate 15. That's right.
- the deflection / substrate speed setting means 41 detects the movement speed Usub when the movement speed Usub in the radial direction of the substrate 15 by the substrate speed adjustment means 37A, 37B changes.
- the beam deflection means 33 changes the radial deflection velocity Ubeam of the exposure beam EB in response to the mechanical response delay with respect to the change of the beam.
- deflection's substrate speed setting means 41 changes the beam radial deflection speed Ubeam by the beam deflection means 33, and the beam EB is deflected in the following direction by the insufficient tracking. To cover. As a result, the non-uniformly spaced portions of the tracks can be eliminated and the track arrangement intervals can be made uniform (dense and uniform, sparse and uniform, etc.)
- FIGS. 15 (a) and 15 (b) show a modification when such a time constant is large, and FIG. 15 (b) shows a substrate 15 including recording sections R33 to R35 that are continuous in the radial direction.
- FIG. 13A is an explanatory diagram schematically showing the amount of deflection of the electron beam (EB) at the time of electron beam writing in the section R33 to R35.
- Fig. 15 (a) and (b) when shifting from a portion where the radial distribution of the track is dense (in this example, the recording section R33) to a sparse portion (in this example, the recording section R34), When returning to a dense part (in this example, the recording section R35), the radial movement speed Usub of the substrate 15 increases and decreases, respectively.
- the recording apparatus 10 in the above embodiment irradiates a resist layer formed on the substrate 15 with the exposure beam EB corresponding to the recording signal while moving the substrate 15, thereby forming a latent image on the resist layer.
- the irradiation speed of the exposure beam EB is moved relative to the substrate 15 and the optimum speed generator 47 that variably sets the circumferential drawing speed Vexp in forming the latent image.
- the recording interval R2 in which the circumferential distribution of the drawing pattern is relatively sparse corresponds to the circumferential movement velocity Vsub of the substrate 15 and the circumferential deflection velocity Vbeam of the exposure beam EB.
- the recording period Rl, R3, where the circumferential distribution of the drawing pattern is relatively dense, is made faster, and the circumferential movement speed Vsub of the substrate 15 and the deflection speed Vbeam of the exposure beam EB in the circumferential direction are relatively slow. This eliminates (or reduces) blanking) by the blanking control unit 31 for the exposure beam EB.
- the recording signal generating apparatus 100 in the above embodiment includes a beam deflecting unit 33 that relatively moves the irradiation position of the exposure beam EB with respect to the substrate 15 on which the resist layer is formed, and the beam deflecting unit 33.
- the rotation drive unit 37A and the feed drive unit 37B that adjust the substrate moving speed Vsub based on the deflection amount of the exposure beam EB by the rotation drive unit 37A
- the resist layer is irradiated with the exposure beam EB whose irradiation position is moved by the beam deflecting unit 33 while moving the substrate 15 at the circumferential movement speed Vsub adjusted by the feed driving unit 37B.
- the recording control signal generation device 100 generates a control signal for forming a latent image for the recording device that forms the image, and the beam deflecting unit 33 applies the exposure beam EB to the resist layer in response to the recording signal RD.
- An optimum speed generator 47 that variably sets the circumferential drawing speed Vexp in forming the latent image, which is a reference for controlling the circumferential deflection speed Vbeam of the exposure beam EB so as to eliminate or reduce the irradiation interruption time,
- the circumferential deflection speed Vexp of the exposure beam EB by the beam deflector 33 and the circumferential movement speed Vsub of the substrate 15 by the substrate speed adjusting means 37A, 37B are changed in the circumferential drawing speed Vexp. Vs. That changes by the beam deflection means 33, the rotational driving unit and the feed drive unit 37A, deflection to generate a control signal to 37B, and a substrate speed signal generator 41.
- the recording control signal generation device 100 includes a deflection / substrate velocity signal generator 41 and an optimum velocity generator 47, and the deflection / substrate velocity signal generator 41 is exposed to the exposure beam by the beam deflection unit 33.
- EB deflection speed Vbeam and rotation drive part 'feed drive part 37A, 37B movement speed Vsub of substrate 15 is changed according to drawing speed Vexp at the time of latent image formation variably set by optimum speed generator 47 .
- the moving speed Vsub in the circumferential direction of the substrate 15 and the deflection speed Vbeam in the circumferential direction of the exposure beam EB are relatively increased, and the drawing pattern
- the portions Rl and R3 in which the circumferential distribution is relatively dense can be obtained by making the movement speed Vsub in the circumferential direction of the substrate 15 and the deflection speed Vbeam in the circumferential direction of the exposure beam EB relatively slow so that the exposure beam EB It is possible to eliminate (or reduce) the irradiation blocking time on the resist layer.
- the electron beam recording device 10 and the recording control signal generation device 100 that create a master on which a drawing pattern of an optical disk is formed have been described.
- a magnetic material to be recorded is a space.
- the present invention can also be applied to the production of so-called discrete track media and pattern recording media separated from each other.
- the electron beam recording apparatus 10 includes a resist-coated substrate (corresponding to the substrate 15), a mechanism for moving the substrate in the horizontal direction (corresponding to the stage 18 and the like), and a rotating stage for rotating the substrate. (Corresponding to the turntable 16 described above), and an X- ⁇ type electron beam recording apparatus that draws a resist by irradiating it with an electron beam exposure beam.
- a dot pattern is formed by performing drawing at regular intervals while simultaneously rotating in the radial direction while rotating the stage. At that time, it is possible to provide the dot rows in a spiral shape without deflecting the electron beam during the rotation, but as disclosed in JP-A-2002-367241, the resist is arranged every rotation. It is also possible to draw concentric dot rows by performing exposure by gradually changing the amount of deflection of the electron beam in a sawtooth shape so as to draw concentric circles. In addition to the data dot pattern, a region provided with a servo pattern for address extraction or track position control may be created.
- a patterned magnetic recording medium is called a hard disk or a patterned medium as a patterned hard disk.
- the patterned magnetic recording medium 80 can be divided into a servo pattern portion 81 and a patterned data track portion 82.
- the dot pattern of the data track portion 82 is shown only on the outer peripheral portion and the inner peripheral portion, but it is deformed and omitted, and actually covers the entire effective radius of the disc. Exist.
- servo pattern portions 81 other than those shown in the figure.
- the swing arm head 83 is configured to be swingable in the radial direction of the magnetic recording medium 80, and reads or writes data recorded in the magnetic recording area of the magnetic recording medium 80.
- a recording medium pattern of dot rows arranged concentrically is formed.
- the servo pattern portion 81 a rectangular pattern indicating address information and track detection information, a line pattern extending in the radial direction across the track from which clock timing is extracted, and the like are formed.
- the servo pattern portion 81 has the same form as the current hard disk recording medium, but a new format optimized for patterned media.
- a single mat servo pattern may be used to adopt a pattern shape and form different from those of current hard disk media.
- the servo pattern portion 81 and the data track portion 82 by the electron beam recording apparatus 10, it is necessary to draw with different drawing pattern densities in the respective areas. .
- the length (time) blanked per unit length (time) in the circumferential direction in the servo pattern portion 81 and the data track portion 82. ) are different. For example, if the servo pattern 81 is blanked by 40% in the circumferential direction and the data track 82 is blanked by 60%, the servo pattern 81 is relatively dense in the circumferential direction and the data track 82 is relatively circumferential. Sparse.
- the first half of the method of manufacturing a pattern recording medium by manufacturing a transfer mold (mold) for imprint using a resist mask and performing transfer using the transfer mold for imprint. It constitutes.
- the pattern recording medium manufacturing method using this imprint method draws and exposes each medium. Therefore, mass production efficiency is improved and the mass production process can be used.
- an imprint transfer mold is manufactured by the electron beam recording apparatus 10, and this This is an example for manufacturing a patterned magnetic recording medium as an example of a magnetic recording medium by an imprint transfer mold.
- FIGS. 17 to 22 are sectional views showing an example of a process for manufacturing an imprint transfer mold according to this application example.
- an appropriately sized glass or silicon (Si) wafer is prepared as the substrate 71.
- a resist material necessary for pioneer turning is formed on the substrate 71 by spin coating or the like.
- an electron beam resist film 72 is formed in order to perform electron beam exposure by the electron beam recording apparatus 10.
- the electron beam resist film 72 is pre-betaned as necessary.
- the electron beam recording apparatus 10 in the above embodiment performs drawing by exposure with an electron beam as shown in FIG. 18, and forms a latent image 72a on the electron beam resist film 72 (latent image formation).
- beta PEB: Post Exposure bake
- the electron beam resist film 72 is developed, a groove 72b as shown in FIG. 19 is formed in the electron beam resist film 72.
- the electron beam resist film 72 is subjected to post-beta if necessary.
- the surfaces of the electron beam resist film 72 and the substrate 71 are coated with nickel as an initial conductive film as shown in FIG. Is formed.
- the nickel alloy thin film 73 is used as an electrode, and an electric plating (electrical plating) is applied, so that a nickel layer 74 (transfer type substrate) is formed. Material). Then, by removing the nickel layer 74 from the substrate 71, a master stamper 74A (imprint transfer mold: mold) such as nickel can be obtained as shown in FIG. At this time, the surface of the master stamper 74A is cleaned as necessary.
- an electric plating electrical plating
- the method of manufacturing the transfer mold 74A (master stamper) in the application example of the above embodiment is formed by drawing the electron beam EB on the resist layer on the substrate 15 while moving the substrate 15 (17).
- a drawing speed setting step for variably setting the drawing speeds Vexp and Uexp in forming a latent image to be formed, a beam deflection step for moving the irradiation position of the exposure beam EB relative to the substrate 15, and the substrate Adjust the movement speed Vsub, Usub of 15
- the transfer mold 74A (master stamper) in the application example of the above embodiment forms the latent image 72a to be formed on the resist layer 72 on the substrate 15 by drawing the electron beam EB while moving the substrate 15.
- a drawing speed setting step for variably setting the drawing speeds Vexp and Uexp
- a beam deflection step for moving the irradiation position of the exposure beam EB
- a substrate speed adjusting step for adjusting the moving speed of the substrate 15, and the above
- It is manufactured by a transfer mold manufacturing method having a latent image forming step for forming 72a and a transfer mold forming step for transferring the latent image 72a and forming a transfer mold 74A having a concavo-convex shape 72b.
- FIG. 23 to 27 are sectional views showing an example of a process for manufacturing an imprint transfer mold according to another form of this application example.
- FIG. 23 to FIG. 27 show manufacturing steps instead of the above-described FIG. 20 to FIG.
- the substrate 71 (substrate material) is formed by the electron beam resist film 72 as shown in FIG.
- Etching is performed using the resist pattern to be formed as a mask.
- the remaining electron beam resist film 72 is removed by oxygen plasma ashing or the like, and the substrate 71 is exposed as shown in FIG.
- nickel or the like is sputtered as an initial conductive film on the exposed surface of the substrate 71 by a sputtering apparatus (not shown) as shown in FIG. 25 to form a nickel alloy thin film 73.
- a sputtering apparatus not shown
- FIG. 25 the surface of the nickel alloy thin film 73 is electroplated by using the nickel alloy thin film 73 as an electrode.
- a nickel layer 74 is formed.
- a master stamper 74A imprint transfer mold: mold
- the surface of the master stamper 74A is cleaned as necessary.
- the imprint transfer mold and the imprint transfer product according to the present embodiment have a density of 500 Gbpsi (GbitZinch 2 ) or more, for example, 1 to: Ultra fine corresponding to a very high surface recording density of about LOTbpsi. Effective in pattern. Specifically, by using a transfer mold having a pattern with a pit interval of about 25 nm, it is possible to produce a high-density pattern recording medium having a recording density of about 1 Tbpsi.
- the method of manufacturing the mask having the concavo-convex portion includes the electron beam recording apparatus 10 capable of forming a high-definition pattern. Desirable to use.
- FIGS. 28 to 31 are cross-sectional views showing an example of a method for manufacturing a patterned magnetic recording medium.
- the process of producing a patterned magnetic recording medium is roughly divided into a transfer product formation process, an imprint process, an etching process, a nonmagnetic material filling process, and a protective film (lubricating film) formation process. It is done sequentially.
- a base substrate for a magnetic recording medium made of a special glass tempered glass, a Si wafer, an aluminum plate, or another material (corresponding to a substrate 116 described later).
- the recording film layer 101 is formed on the substrate 116 by sputtering or the like.
- the recording film layer 101 is a laminated structure such as a soft magnetic underlayer, an intermediate layer, and a ferromagnetic recording layer.
- a metal mask layer 102 such as Ta or Ti is formed on the recording film layer 101 by sputtering or the like as shown in FIG. Furthermore, on the metal mask layer 102, a heat coating such as polymethyl methacrylate resin (PMMA) is applied by spin coating or the like. A plastic resin resist is deposited as the transfer material 202.
- PMMA polymethyl methacrylate resin
- the transfer mold 74A is set in an imprint apparatus (not shown) so that the concavo-convex surface faces the transfer material 202. That is, the transfer mold 74A is set by being supported by a not shown mold holding mechanism.
- the inside of the working chamber (not shown) is depressurized as necessary. Thereafter, in this imprint apparatus, if necessary, the transfer material 202 is heated until it has fluidity and then pressed.
- this imprint apparatus is 120 to 200 ° C (eg about 160 ° C) above the glass transition temperature. Then, the transfer mold 74A is pressed against the transfer substrate 3 with a pressing force of 1 to: LOOOOkPa (for example, about lOOOOkPa).
- the inside of the working chamber 1 has an achieved vacuum of several hundred Pa or less (for example, It is desirable to have a vacuum state of about lOPa).
- the transfer material 202 unnecessary as an etching mask is removed by soft ashing using O gas or the like. Then, as shown in Figure 32,
- the tall mask layer 102 is formed using CHF gas or the like using the transfer material 202 as an etching mask.
- the remaining transfer material 202 uses a wet process or O gas.
- the recording film layer 101 is etched by dry etching using Ar gas or the like using the metal mask layer 102 as an etching mask.
- the remaining metal mask layer 102 is removed by a wet process or dry etching as shown in FIG.
- a material that is not recorded (in the case of a magnetic recording medium, non-magnetic material 104 such as SiO) is patterned in a sputtering or coating process.
- the groove portion is filled.
- the surface of the nonmagnetic material 104 is polished and flattened by etch back, chemical polishing, or the like.
- the recording material can be separated by the non-recording material 104.
- the protective film (lubricating film) forming step as shown in FIG. 38, for example, the protective film 105 and the lubricating film 106 of the recording film layer 101 are formed on the surface by a coating method or a dating method, The pattern recording medium is completed. Further, the pattern recording medium force can be incorporated into a hard disk drive housing to form a patterned medium in which the pattern recording medium is built in the hard disk drive housing. A patterned magnetic recording medium can be manufactured through the above steps.
- the magnetic disk (patterned magnetic recording medium) in the application example of the above embodiment is a drawing in the formation of a latent image to be formed by drawing the electron beam EB on the resist layer on the substrate 15 while moving the substrate 15.
- a drawing speed setting step for variably setting the speeds Vexp and Uexp
- a beam deflection step for moving the irradiation position of the exposure beam EB
- a substrate speed adjustment step for adjusting the moving speeds Vsub and Usub of the substrate 15, and the exposure described above.
- a control step of changing the deflection speed Vbeam, Ubeam of the beam EB and the moving speed Vsub, Usub of the substrate 15 in accordance with the change of the drawing speed Vexp, Uexp, and a latent image on the resist layer 72 A latent image forming step for forming 72a; a transfer mold forming step for transferring the latent image 72a to form a transfer die 74A having a concavo-convex shape 72b; A transfer step of transferring the concavo-convex shape onto a base substrate 116 for a magnetic recording medium, and a transfer product forming step of peeling the transfer mold 74A to form a transfer product having the concavo-convex shape. It is manufactured by the manufacturing method of the magnetic disk which is characterized.
- This patterned magnetic recording medium can also be produced by etching a recording material directly using a resist mask formed by creating and developing a latent image drawn and exposed by the above-mentioned pattern production method. .
- FIG. 39 to FIG. 41 are cross-sectional views showing an example of a method for producing a patterned magnetic recording medium. These FIGS. 39 to 41 show a part of the above-described transcript formation process (the above-described drawings). 28 to Fig. 30).
- a recording film layer 101 is formed on a substrate 116 serving as a body base by sputtering or the like.
- a metal mask layer 102 such as Ta or Ti is formed on the recording film layer 101 by sputtering or the like, and the transfer substrate 3 is formed. Further, on this metal mask layer 102, an electron beam resist film 72 is formed as a resist material necessary for patterning by spin coating or the like. The electron beam resist film 72 is subjected to prebeta or the like as necessary.
- the electron beam recording apparatus 10 performs drawing on the electron beam resist film 72.
- the electron beam recording apparatus 10 draws on the electron beam resist film 72 in a predetermined pattern corresponding to the pattern on which the magnetic material is to be formed in the data track portion 82 shown in FIG. As shown in FIG. 40, the electron beam resist film 72 on which a predetermined pattern is formed performs a post exposure bake (PEB) after exposure as necessary.
- PEB post exposure bake
- the electron beam resist film 72 is patterned by development. Note that the electron beam resist film 72 having such a pattern is subjected to post-beta if necessary.
- the transfer material 202 shown in FIGS. 31 and 32 is replaced with the electron beam resist film 72, and the etching process, non-magnetic material filling process, and protective film (lubricating film) formation shown in FIGS. It is the same as the process.
- FIG. 1 is a block diagram schematically showing a configuration of a recording apparatus according to an embodiment of the present invention.
- FIG. 2 is a functional block diagram showing an example of a detailed configuration of a portion of the controller that performs beam deflection control and substrate position control.
- FIG. 3 is an explanatory diagram schematically showing a tracking frequency band of a ⁇ stage and an X stage, a pass frequency band of a low-pass filter, and a frequency band for performing a recording operation.
- FIG. 5 is a diagram schematically illustrating the basic behavior of recording control according to an embodiment of the present invention.
- FIG. 6 is an explanatory diagram schematically showing the deflection amount of the electron beam and the track of the substrate in the continuous recording section.
- Deflection of the controller is a flowchart showing a control procedure executed by the substrate speed signal generator and the optimum speed generator.
- FIG. 10 is an explanatory view schematically showing the deflection amount of the electron beam and the track of the substrate in a modified example in which multiple latent images are formed.
- FIG. 15 is an explanatory view schematically showing the amount of deflection of the electron beam and the track of the substrate in a modified example having a large time constant during substrate movement control.
- ⁇ 16 A plan view showing an example of a patterned magnetic recording medium manufactured using a transfer mold.
- ⁇ 17 A cross-sectional view showing an example of a method for manufacturing an imprint transfer mold.
- FIG. 18 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 21 A sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 22 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 23 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 24 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- ⁇ is a cross-sectional view showing an example of a method for producing a 25 imprint transfer mold.
- FIG. 26 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 25 is a cross-sectional view showing an example of a method for producing an imprint transfer mold.
- FIG. 28 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 29 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 30 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 1 A sectional view showing an example of a method for producing a 31-pattern magnetic recording medium.
- FIG. 32 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 34 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- ⁇ is a cross-sectional view showing an example of a method for producing a 35-pattern magnetic recording medium.
- FIG. 36 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 38 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 39 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 40 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- FIG. 41 is a cross-sectional view showing an example of a method for producing a patterned magnetic recording medium.
- Beam deflection unit Beam deflection means
- Electron beam Exposure beam
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/293,017 US8130626B2 (en) | 2006-03-15 | 2007-03-15 | Recording apparatus, recording control signal generating apparatus, method of manufacturing imprint mold, imprint mold, and magnetic disc |
JP2008505207A JP4523059B2 (ja) | 2006-03-15 | 2007-03-15 | 記録装置、記録制御信号生成装置及び転写型の製造方法 |
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JP2006-070527 | 2006-03-15 | ||
JP2006070527 | 2006-03-15 |
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WO2007105799A1 true WO2007105799A1 (ja) | 2007-09-20 |
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PCT/JP2007/055245 WO2007105799A1 (ja) | 2006-03-15 | 2007-03-15 | 記録装置、記録制御信号生成装置、転写型の製造方法、転写型及び磁気ディスク |
Country Status (4)
Country | Link |
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US (1) | US8130626B2 (ja) |
JP (3) | JP4523059B2 (ja) |
TW (1) | TW200809854A (ja) |
WO (1) | WO2007105799A1 (ja) |
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WO2011115139A1 (ja) * | 2010-03-16 | 2011-09-22 | Hoya株式会社 | 電子ビーム露光方法および電子ビーム露光装置 |
CN107008980A (zh) * | 2017-05-04 | 2017-08-04 | 南京工程学院 | 一种振动辅助电弧铣削加工用内冲液振动旋转主轴 |
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JP5226943B2 (ja) * | 2006-08-31 | 2013-07-03 | 株式会社リコー | 描画方法及び描画装置、並びに情報記録媒体 |
JP2009015910A (ja) * | 2007-06-29 | 2009-01-22 | Toshiba Corp | 電子線描画方法 |
JP5098633B2 (ja) * | 2007-12-27 | 2012-12-12 | ソニー株式会社 | ディスク原盤、ディスク原盤製造方法、スタンパ、ディスク基板、光ディスク、光ディスク製造方法 |
US8018820B2 (en) * | 2008-08-15 | 2011-09-13 | Seagate Technology, Llc | Magnetic recording system using e-beam deflection |
CN104894534B (zh) * | 2015-06-26 | 2017-12-29 | 京东方科技集团股份有限公司 | 气相沉积设备 |
AU2019461917B2 (en) * | 2019-08-14 | 2022-08-25 | Ceramic Data Solutions GmbH | Method for long-term storage of information and storage medium therefor |
US11935572B2 (en) | 2020-07-03 | 2024-03-19 | Ceramic Data Solutions GmbH | Increased storage capacity for a method for long-term storage of information and storage medium therefor |
WO2022002444A1 (en) | 2020-07-03 | 2022-01-06 | Ceramic Data Solution GmbH | Information storage method and information storage medium with increased storage density by multi-bit coding |
EP3955248A1 (en) | 2020-08-11 | 2022-02-16 | Christian Pflaum | Data recording on ceramic material |
EP4085455A1 (en) | 2021-03-16 | 2022-11-09 | Ceramic Data Solutions GmbH | Data carrier, reading method and system utilizing super resolution techniques |
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Also Published As
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JP4491512B2 (ja) | 2010-06-30 |
JPWO2007105799A1 (ja) | 2009-07-30 |
TW200809854A (en) | 2008-02-16 |
US8130626B2 (en) | 2012-03-06 |
JP2010061805A (ja) | 2010-03-18 |
JP2010192908A (ja) | 2010-09-02 |
US20090207395A1 (en) | 2009-08-20 |
JP5432778B2 (ja) | 2014-03-05 |
JP4523059B2 (ja) | 2010-08-11 |
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