Articles with lamination transfer films having engineered voids

Patent metadata

Field	Value
Publication number	US-9731473-B2
Application number	US-201615206757-A
Country	US
Kind code	B2
Filing date	Jul 11, 2016
Priority date	Jan 20, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

Transfer films, articles made therewith, and methods of making and using transfer films to form bridged nanostructures are disclosed.

First claim

What is claimed is:

1. An article comprising:
a substrate; and
a transfer film laminated to the substrate, wherein the transfer film comprises:
a sacrificial template layer having a first surface and a second surface having a structured surface opposite the first surface;
a thermally stable backfill layer conforming to the structured surface of the sacrificial template layer;

wherein a portion of the sacrificial template layer proximate the first surface has a greater concentration of a thermally stable molecular species than a portion of the sacrificial template layer proximate the second surface.

2. The article according to claim 1 , wherein the substrate comprises glass.

3. The article according to claim 2 , wherein the glass includes display mother glass, display cover glass, lighting mother glass, architectural glass, roll glass or flexible glass.

4. The article according to claim 1 , wherein the substrate comprises metal.

5. The article according to claim 4 , wherein the metal includes a metal part, a metal sheet or a metal foil.

6. The article according to claim 1 , wherein the substrate includes sapphire, silicone, silica or silicon carbide.

7. The article according to claim 1 , wherein the sacrificial template layer comprises a layer of thermally stable molecular species and the layer of thermally stable molecular species is separated from the structured surface of the sacrificial template layer by a layer of sacrificial material.

8. The article according to claim 7 , wherein the layer of sacrificial material consists essentially of sacrificial material.

9. The article according to claim 1 , wherein the sacrificial template layer comprises a gradient of thermally stable molecular species and the gradient comprises a concentration of thermally stable molecular species that changes as a function of a distance from the structured surface along a thickness direction of the sacrificial template layer.

10. The article according to claim 9 , wherein the concentration of thermally stable molecular species increases as a distance from the structured surface increases.

11. The article according to claim 10 , wherein the concentration of thermally stable molecular species is greatest about the first surface.

12. The article according to claim 1 , wherein the thermally stable molecular species comprises silicon, aluminum, hafnium, barium, strontium, titanium, or zirconium.

13. The article according to claim 1 , wherein the thermally stable molecular species comprises a metal or metal oxide or metal oxide precursor.

14. The article according to claim 1 , wherein the thermally stable molecular species comprises an organosilicon polymer.

15. The article according to claim 9 , wherein the sacrificial template layer comprises a (meth)acrylic polymer.

16. The article according to claim 15 , wherein the (meth)acrylic polymer comprises a majority of polyether segments or a majority of ethoxylated segments.

17. The article according to claim 1 , wherein the thermally stable molecular species migrates from the thermally stable backfill layer into the sacrificial template layer.

18. The article according to claim 1 , wherein the sacrificial template layer is capable of being baked out while leaving engineered voids defined by a bridging layer and the structured surface of the thermally stable backfill layer, wherein the bridging layer is formed from the thermally stable molecular species within the sacrificial template layer and the bridging layer is disposed on the structured surface.

Assignees

• 3M Innovative Properties Co

Inventors

• Schwartz Evan L
• Meyer Justin P
• Benson Jr Olester
• Collier Terry O
• Free Michael Benton
• Kamrath Robert F
• Mazurek Mieczyslaw H
• Olson David B
• Shenoy K Raveesh
• Wolk Martin B

Classifications

• H10K50/858

  comprising refractive means, e.g. lenses · CPC title

• B29D11/00788

  Producing optical films · CPC title

• H10K50/86 Primary

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title

• B32B2457/12

  Photovoltaic modules · CPC title