Patent ID: 11954546
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC C  G  B | IPC B  G

Claim 9:
10. A method for producing a structure for individual authentication in which a pillar pattern region including a plurality of nanopillars formed of synthetic quartz glass is formed on at least a part of a surface portion of a synthetic quartz glass substrate, wherein
in the pillar pattern region, the nanopillars have an indentation elastic modulus of 35 to 100 GPa as measured by a nanoindentation method, and
the nanopillars are plastically deformed, wherein
the method comprising the steps of:
forming an organic film on the surface of the synthetic quartz glass substrate, the surface being for forming the pillar pattern region;
patterning the organic film to form an organic film pattern on the surface of the synthetic quartz glass substrate;
forming an inorganic film on the organic film pattern and the exposed surface of the synthetic quartz glass substrate;
removing the organic film pattern together with the inorganic film formed on the organic film pattern;
etching the surface portion of the synthetic quartz glass substrate with the inorganic film pattern, as an etching mask, which is formed from the inorganic film formed on the surface of the synthetic quartz glass substrate, to form the pillar pattern region; and
removing the inorganic film pattern.