Die repairing method and method for manufacturing functional film using same

Patent metadata

Field	Value
Publication number	US-9873213-B2
Application number	US-201314376982-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Feb 8, 2012
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

This is a mold repairing method for removing a resin material deposited on a mold, of which the surface is a porous film with a plurality of recesses that have been created through anodization. The mold repairing method includes the steps of: (I) removing the resin material that is exposed on the surface of the mold over the plurality of recesses without performing atmospheric pressure plasma processing; and (II) removing at least partially the resin material that is still left inside the plurality of recesses by the atmospheric pressure plasma processing, after the step (I) has been performed, thereby recovering the original function of the mold.

First claim

The invention claimed is:

1. A mold repairing method for removing a resin material deposited on a mold, of which the surface is a porous film with a plurality of recesses that have been created through anodization, the method comprising the steps of:
(I) removing the resin material that is exposed on the surface of the mold over the plurality of recesses without performing atmospheric pressure plasma processing; and
(II) removing the resin material that is still left inside the plurality of recesses by the atmospheric pressure plasma processing, after the step (I) has been performed, wherein the step (I) includes removing the resin material by spraying dry ice so that the atmospheric pressure plasma processing in step (II) removes the resin material in the recesses in less than 60 minutes, wherein the mold includes an aluminum material and the porous film includes a porous alumina layer.

2. The repairing method of claim 1 , wherein in the step (II), the resin material that is partially left on the mold is subjected to the atmospheric pressure plasma processing just locally.

3. The repairing method of claim 1 , wherein the surface of the mold is comprised of curved surfaces.

4. The repairing method of claim 1 , wherein a mold releasing agent has been applied onto the surface of the mold.

5. A method of making a functional film, the method comprising the steps of:
providing a mold, of which the surface is a porous film with a plurality of recesses that have been created by anodization;
imprinting the surface shape of the mold onto a photocurable resin material;
removing, after the step of imprinting, the photocurable resin material that has been deposited on the mold; and
imprinting, after the step of removing the resin material deposited, the surface shape of the mold onto the photocurable resin again,
wherein the step of removing the photocurable resin material includes the steps of:
(I) removing the resin material that is exposed on the surface of the mold over the plurality of recesses without performing atmospheric pressure plasma processing; and
(II) removing the resin material that is still left inside the plurality of recesses by the atmospheric pressure plasma processing, after the step (I) has been performed, wherein the step (I) includes removing the resin material by spraying dry ice so that the atmospheric pressure plasma processing in step (II) removes the resin material in the recesses in less than 60 minutes, wherein the mold includes an aluminum material and the porous film includes a porous alumina laver.

6. The method of claim 5 , wherein the step of providing the mold includes applying a mold releasing agent onto the surface of the porous film.

7. A mold repairing method for removing a resin material deposited on a mold, of which the surface is a porous film with a plurality of recesses that have been created through anodization, the method comprising the steps of:
(I) removing the resin material that is exposed on the surface of the mold over the plurality of recesses without performing atmospheric pressure plasma processing; and
(II) removing at least partially the resin material that is still left inside the plurality of recesses by the atmospheric pressure plasma processing, after the step (I) has been performed, wherein the step (I) includes removing the resin material by laser ablation, so that the atmospheric pressure plasma processing in step (II) removes the resin material in the recesses in less than 60 minutes, wherein the mold includes an aluminum material and the porous film includes a porous alumina layer.

8. The repairing method of claim 7 , wherein the mold includes an aluminum material and the porous film includes a porous alumina layer.

9. The repairing method of claim 7 , wherein in the step (II), the resin material that is partially left on the mold is subjected to the atmospheric pressure plasma processing just locally.

10. The repairing method of claim 7 , wherein the surface of the mold is comprised of curved surfaces.

11. The repairing method of claim 7 , wherein a mold releasing agent has been applied onto the surface of the mold.

12. A method of making a functional film, the method comprising the steps of:
providing a mold, of which the surface is a porous film with a plurality of recesses that have been created by anodization;
imprinting the surface shape of the mold onto a photocurable resin material;
removing, after the step of imprinting, the photocurable resin material that has been deposited on the mold; and
imprinting, after the step of removing the resin material deposited, the surface shape of the mold onto the photocurable resin again,
wherein the step of removing the photocurable resin material includes the steps of:
(I) removing the resin material that is exposed on the surface of the mold over the plurality of recesses without performing atmospheric pressure plasma processing; and
(II) removing at least partially the resin material that is still left inside the plurality of recesses by the atmospheric pressure plasma processing, after the step (I) has been performed, wherein the step (I) includes removing the resin material by laser ablation, so that the atmospheric pressure plasma processing in step (II) removes the resin material in the recesses in less than 60 minutes, wherein the mold includes an aluminum material and the porous film includes a porous alumina layer.

13. The repairing method of claim 12 , wherein the step of providing the mold includes applying a mold releasing agent onto the surface of the porous film.

Assignees

• Sharp Kk

Inventors

• Hayashi Hidekazu

Classifications

• B29D11/00288

  made by a rotating cylinder · CPC title

• B29C33/58

  Applying the releasing agents · CPC title

• B29D11/00278

  Lenticular sheets (B29D11/00269 takes precedence) · CPC title

• B29C2033/725

  cleaning by plasma treatment · CPC title

• G02B1/118

  having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures · CPC title