Imprint stamper, method for manufacturing the same, recording medium, method for manufacturing the same, information recording/reproducing method, and information recording/reproducing apparatus

Abstract

An imprint stamper for manufacturing a recording medium includes a first transfer region which corresponds to a servo region of a recording medium using a sector servo system and has a pattern with a plurality of quadrilateral recess or protrusion portions formed in a surface thereof, and a second transfer region which corresponds to a data region of the recording medium and has a pattern with a plurality of dots of recess or protrusion portions arrayed in a form of a hexagonal lattice in a surface thereof.

1 . An imprint stamper for manufacturing a recording medium comprising: 
 a first transfer region which corresponds to a servo region of a recording medium using a sector servo system, and has a pattern with a plurality of quadrilateral recess or protrusion portions formed in a surface thereof; and    a second transfer region which corresponds to a data region of the recording medium, and has a pattern with a plurality of dots of recess or protrusion portions arrayed in a form of a hexagonal lattice in a surface thereof.    
     
     
         2 . The imprint stamper for manufacturing a recording medium according to  claim 1 , 
 wherein the recording medium is a magnetic recording medium.    
     
     
         3 . The imprint stamper for manufacturing a recording medium according to  claim 1 , further comprising: 
 a third transfer region which corresponds to a data positioning signal region of the recording medium, and has a pattern comprised of a quadrilateral section formed out of a plurality of dot-like recess or protrusion portions arrayed in a form of a hexagonal lattice in a surface thereof and a quadrilateral flat section.    
     
     
         4 . An imprint stamper for manufacturing a recording medium comprising: 
 a second transfer region which corresponds to a data region of a recording medium using a sector servo system, and has a pattern with a plurality of dots of recess or protrusion portions arrayed in a form of a hexagonal lattice in a surface thereof;    a third transfer region which corresponds to a data positioning signal region of the recording medium, and has a pattern comprised of a quadrilateral section formed out of a plurality of dot-like recess or protrusion portions arrayed in a form of a hexagonal lattice in a surface thereof and a quadrilateral flat section; and    a second non-transfer region which has a flat surface and located in conformity with the servo region of the recording medium.    
     
     
         5 . A method for manufacturing a magnetic recording medium manufacturing imprint stamper comprising: 
 forming a mold pattern of quadrilaterals in a first transfer region of a stamper material corresponding to a servo region of a magnetic recording medium by an artificial drawing method;    forming a flat surface in a first non-transfer region of the stamper material located in conformity with a data region of the magnetic recording medium so as to form a servo region master imprint stamper which corresponds to the magnetic recording medium using a sector servo system;    forming recess portions in a region of a resist film formed on a substrate while locating the region in conformity with the data region of the magnetic recording medium;    filling the recess portions in a surface of the substrate with a self-assembled material;    giving a phase-separation to the self-assembled material in the substrate;    processing the recess portions in the substrate surface so as to form a molded pattern with a plurality of dots arrayed in a form of a hexagonal lattice;    transferring the molded pattern to a stamper material to thereby produce a data region master imprint stamper having a mold pattern with a plurality of dots arrayed in a form of a hexagonal lattice in a second transfer region corresponding to the data region of the magnetic recording medium;    pairing the servo region master imprint stamper and the data region master imprint stamper with each other;    transferring the mold patterns of the paired master imprint stampers in turn to a master substrate so as to form a master having a molded pattern in a surface thereof; and    transferring the molded pattern of the master to a stamper material to thereby form a composite-type medium imprint stamper having a mold pattern.    
     
     
         6 . A recording medium using a sector servo system, comprising: 
 a plurality of servo regions which have a plurality of quadrilateral recording materials; and    a plurality of data regions which are formed in regions segmented by the plurality of servo regions, and have a plurality of recording dots arrayed in a form of a hexagonal lattice.    
     
     
         7 . The recording medium using a sector servo system according to  claim 6 , 
 wherein each data region further includes a data positioning signal region which has a pattern comprised of a quadrilateral section formed out of a plurality of recording dots arrayed in a form of a hexagonal lattice and a quadrilateral section having no recording material.    
     
     
         8 . The recording medium using a sector servo system according to  claim 7 , 
 wherein each data region further includes a guide zone having no recording material.    
     
     
         9 . The recording medium using a sector servo system according to  claim 7 , 
 wherein the recording material is a magnetic recording material.    
     
     
         10 . The recording medium using a sector servo system according to  claim 8 , 
 wherein the recording material is a magnetic recording material.    
     
     
         11 . A method for manufacturing a magnetic recording medium comprising: 
 forming a mold pattern of quadrilaterals in a first transfer region of a stamper material corresponding to a servo region of a magnetic recording medium by an artificial drawing method;    forming a flat surface in a first non-transfer region of the stamper material located in conformity with a data region of the magnetic recording medium so as to form a servo region master imprint stamper which corresponds to the magnetic recording medium using a sector servo system;    forming recess portions in a region of a resist film formed on a substrate while locating the region in conformity with the data region of the magnetic recording medium;    filling the recess portions in a surface of the substrate with a self-assembled material;    giving a phase-separation to the self-assembled material in the substrate;    processing the recess portions in the substrate surface so as to form a molded pattern with a plurality of dots arrayed in a form of a hexagonal lattice;    transferring the molded pattern to a stamper material to thereby produce a data region master imprint stamper having a mold pattern with a plurality of dots arrayed in a form of a hexagonal lattice in a second transfer region corresponding to the data region of the magnetic recording medium;    pairing the servo region master imprint stamper and the data region master imprint stamper with each other;    transferring the mold patterns of the paired master imprint stampers in turn to a master substrate so as to form a master having a molded pattern in a surface thereof, the surface including a region patterned with a plurality of quadrilaterals and a region patterned with a plurality of dots arrayed in a form of a hexagonal lattice;    transferring the molded pattern of the master to a stamper material to thereby form a composite-type medium imprint stamper having a mold pattern; and    transferring the mold pattern of the composite-type medium imprint stamper to a magnetic recording medium substrate so as to produce a magnetic recording medium having magnetic recording materials arranged in a molded pattern.    
     
     
         12 . The method for manufacturing a magnetic recording medium according to  claim 11 , 
 wherein the self-assembled material is a self-assembled material by which portions of the composite-type medium imprint stamper corresponding to the recording materials are formed as recess portions in the forming the mold pattern; and    wherein the transferring the mold pattern of the composite-type medium imprint stamper to the magnetic recording medium substrate so as to produce a magnetic recording medium having a molded pattern, the transferring includes:    transferring the mold pattern of the composite-type medium imprint stamper to a resist film formed on a magnetic recording medium producing substrate having a magnetic layer so as to form a molded pattern in the resist film; and    processing the magnetic layer based on the molded pattern of the resist film on the magnetic recording medium producing substrate.    
     
     
         13 . A method for manufacturing a magnetic recording medium comprising: 
 forming a mold pattern of quadrilaterals in a first transfer region of a stamper material corresponding to a servo region of a magnetic recording medium by an artificial drawing method;    forming a flat surface in a first non-transfer region of the stamper material located in conformity with a data region of the magnetic recording medium so as to form a servo region medium imprint stamper which corresponds to the magnetic recording medium using a sector servo system;    forming recess portions in a region of a resist film formed on a substrate while locating the region in conformity with the data region of the magnetic recording medium;    filling the recess portions in a surface of the substrate with a self-assembled material;    giving a phase-separation to the self-assembled material in the substrate;    processing the recess portions in the substrate surface so as to form a molded pattern with a plurality of dots arrayed in a form of a hexagonal lattice;    transferring the molded pattern to a stamper material to thereby produce a data region medium imprint stamper having a mold pattern with a plurality of dots arrayed in a form of a hexagonal lattice in a second transfer region corresponding to the data region of the magnetic recording medium;    pairing the servo region medium imprint stamper and the data region medium imprint stamper with each other; and    transferring the mold patterns of the paired medium imprint stampers in turn to a magnetic recording medium substrate so as to form a magnetic recording medium whose surface has a region patterned with a plurality of quadrilaterals and a region patterned with a plurality of dots arrayed in a form of a hexagonal lattice.    
     
     
         14 . An information recording/reproducing method comprising: 
 reading a positioning signal in a servo region of a recording medium and a positioning signal in a data region of the recording medium by means of a recording/reproducing head;    obtaining relative position information between the servo region and the data region based on the read positioning signal in the servo region and the read positioning signal in the data region; and    controlling a position of the recording/reproducing head based on the relative position information so as to record or reproduce information while sweeping a predetermined track of the recording medium.    
     
     
         15 . An information recording/reproducing apparatus comprising: 
 a recording medium using a sector servo system which includes a plurality of servo regions having a pattern using a plurality of quadrilateral recording materials, and includes a plurality of data regions formed in regions segmented by the plurality of servo regions, each data region including a data recording region having a plurality of recording dots arrayed in a form of a hexagonal lattice, and a data positioning signal region having a pattern comprised of a quadrilateral section formed out of a plurality of recording dots arrayed in a form of a hexagonal lattice and a quadrilateral section having no recording material;    a drive unit which drives the recording medium;    a recording/reproducing head which sweeps the recording medium;    an electronic circuit which processes signals to be inputted/outputted to/from the recording/reproducing head;    a unit which calculates relative position information between the servo regions and the data regions based on a positioning signal of the servo region and a positioning signal of the data region read by the recording/reproducing head; and    a control unit which controls a position of the recording/reproducing head on the recording medium based on the relative position information.    
     
     
         16 . An information recording/reproducing apparatus comprising: 
 a recording medium using a sector servo system which includes a plurality of servo regions having a plurality of quadrilateral recording materials, and includes a data region located in a region segmented by the plurality of servo regions, and having a plurality of recording dots arrayed in a form of a hexagonal lattice;    a drive unit which drives the recording medium;    a recording/reproducing head which sweeps the recording medium;    an electronic circuit which processes signals to be inputted/outputted to/from the recording/reproducing head;    a memory unit which stores relative position information between the servo region and the data region; and    a control unit which controls a position of the recording/reproducing head on the recording medium based on the relative position information.    
     
     
         17 . The information recording/reproducing apparatus according to  claim 16 , 
 wherein each data region further includes a data positioning signal region having a pattern comprised of a quadrilateral section formed out of a plurality of recording dots arrayed in a form of a hexagonal lattice and a quadrilateral section having no recording material.