Methods of using nanostructured transfer tape and articles made therefrom

Patent metadata

Field	Value
Publication number	US-10052856-B2
Application number	US-201615257099-A
Country	US
Kind code	B2
Filing date	Sep 6, 2016
Priority date	Dec 21, 2012
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A method of making patterned structured solid surfaces is disclosed that includes filling a structured template with backfill material to produce a structured transfer film, patternwise curing the backfill material to produce cured areas and uncured areas in the structured transfer film, and laminating the structured transfer film to a receptor substrate. The structured template is capable of being removed to form structured and unstructured backfill layers. The structured and unstructured backfill layers may then be blanket cured. The backfill layer can include at least two different materials, one of which can be an adhesion promotion layer. In some embodiments the backfill layer includes a silsesquioxane such as polyvinyl silsesquioxane. The structured transfer film is a stable intermediate that can be covered temporarily with a release liner for storage and handling.

First claim

The invention claimed is:

1. A method of making patterned structured solid surfaces comprising:
filling a structured template with backfill material to produce a structured transfer film;
patternwise curing the backfill material to produce an intermediate transfer film comprising cured areas and uncured areas in the structured transfer film;
laminating the intermediate transfer film to a receptor substrate;
removing the structured template and allowing the uncured areas to reflow such that the cured areas form structured areas and the uncured areas form unstructured areas of a laminated backfill layer; and
blanket curing the structured and unstructured areas of the laminated backfill layer.

2. A method of making patterned structured solid surfaces comprising:
filling a structured template with backfill material to produce a structured transfer film;
patternwise curing the backfill material in an oxygen environment to produce an intermediate transfer film comprising cured areas and uncured areas in the structured transfer film;
laminating the intermediate transfer film to a receptor substrate;
removing the structured template such that the cured areas form structured areas and the uncured areas form unstructured areas of a laminated backfill layer; and
blanket curing the structured and unstructured areas of the laminated backfill layer.

3. A method of making patterned structured solid surfaces according to claim 1 , wherein one or more layers are applied over the intermediate transfer film before lamination to increase adhesion of the backfilled material to the receptor substrate.

4. A method of making patterned structured solid surfaces according to claim 1 , wherein the backfill material comprises a silsesquioxane.

5. A method of making patterned structured solid surfaces according to claim 1 , wherein the intermediate transfer film is temporarily laminated to a release liner.

6. A method of making patterned structured solid surfaces according to claim 1 , wherein the receptor substrate comprises glass, metal sheet, metal foil, ceramic, silicon, polymer, or composite.

7. A method of making patterned structured solid surfaces according to claim 1 , wherein patternwise curing comprises photocuring through a photomask.

8. A method of making patterned structured solid surfaces according to claim 1 , wherein allowing the uncured areas to reflow further comprise applying heat.

9. The method of claim 1 , wherein the patternwise curing comprises exposing select portions of the backfill material to a laser beam.

10. The method of claim 1 , wherein the structured template comprises a release coating.

11. A method for making a patterned structured solid surface, the method comprising:
filling a structured template with backfill material to produce a structured transfer film, the structured template comprising nanostructures or microstructures;
laminating the structured transfer film onto a receptor substrate;
curing the backfill material patternwise to form an intermediate laminated film comprising cured areas and uncured areas of backfill material;
removing the structured template and allowing the uncured areas to reflow to form unstructured areas; and
blanket curing the cured and uncured areas of the backfill material.

12. The method of claim 11 , wherein the patternwise curing is performed in an oxygen environment.

13. The method of claim 11 , wherein one or more layers are applied over the structured transfer film before lamination to increase adhesion of the backfill material to the receptor substrate.

14. The method of claim 11 , wherein the backfill material comprises a silsesquioxane.

15. The method of claim 11 , wherein the structured transfer film is temporarily laminated to a release liner.

16. The method of claim 11 , wherein the receptor substrate comprises glass, metal sheet, metal foil, ceramic, silicon, polymer, or composite.

17. The method of claim 11 , wherein patternwise curing comprises photocuring through a photomask or exposing select portions of the backfill material to a laser beam.

18. The method of claim 11 , wherein allowing the uncured areas to reflow further comprises applying heat.

19. The method of claim 11 , wherein the structured template comprises a release coating.

Assignees

• 3M Innovative Properties Co

Inventors

• Free Michael Benton
• Wolk Martin B
• Collier Terry O
• Mazurek Mieczyslaw H
• Schwartz Evan L

Classifications

• G03F7/0002

  Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping · CPC title

• B32B2383/00

  Polysiloxanes · CPC title

• B29C41/24

  for making articles of indefinite length · CPC title

• B29C2059/023

  Microembossing · CPC title

• B29C35/0894

  provided with masks or diaphragms · CPC title