Method for manufacturing stamper, method for manufacturing nanohole structure, and method for manufacturing magnetic recording medium

A method for manufacturing a nanohole structure comprising:

• imprinting a plurality of pits using a stamper for duplicating a pit pattern on a substrate obtained by:
• forming on another substrate, a layer of a material insoluble to a liquid of a suspension of particles in a pattern having a plurality of land portions and a plurality of groove portions between the land portions;
• dipping the another substrate having the layer of the material having the pattern in the liquid of the suspension of the particles so that the particles are adhered to the groove portions;
• forming a mold having a plurality of pits corresponding to the particles by transferring the shapes of the particles on the another substrate to the mold;
• and
• forming a stamper having a plurality of protrusions corresponding to the pits by transferring the shapes of the pits of the molds to the stamper;
• and
• forming a plurality of nanoholes by forming treatment of the pits, the nanoholes being larger than the pits.

A method for manufacturing a magnetic recording medium comprising:

• imprinting a plurality of pits using a stamper for duplicating a pit pattern on a substrate obtained by:
• forming on another substrate, a layer of a material insoluble to a liquid of a suspension of particles in a pattern having a plurality of land portions and a plurality of groove portions between the land portions;
• dipping the another substrate having the layer of the material having the pattern in the liquid of the suspension of the particles so that the particles are adhered to the groove portions;
• forming a mold having a plurality of pits corresponding to the particles by transferring the shapes of the particles on the another substrate to the mold;
• and
• forming a stamper having a plurality of protrusions corresponding to the pits by transferring the shapes of the pits of the molds to the stamper;
• forming a plurality of nanoholes by a forming treatment of the pits, the nanoholes being larger than the pits;
• and
• filling the nanoholes with a magnetic material.