Patterned transfer articles

Patent metadata

Field	Value
Publication number	US-11999188-B2
Application number	US-202017610498-A
Country	US
Kind code	B2
Filing date	May 26, 2020
Priority date	May 31, 2019
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A transfer article with a thickness of less than 3 micrometers includes a first acrylate layer that is releasable from a metal or doped semiconductor release layer at a release value of from 2 to 50 grams/inch. The article includes a functional layer overlaying the first acrylate layer. The functional layer includes at least one microfractured inorganic layer about 3 nanometers to about 200 nanometers thick, which has a plurality of toolmarks interspersed with cracks.

First claim

The invention claimed is:

1. A transfer article, comprising:
a first acrylate layer, wherein the first acrylate layer is releasable from a release layer comprising a metal layer or a doped semiconductor layer at a release value of from 2 to 50 grams/inch; and
a functional layer overlaying the first acrylate layer, wherein the functional layer comprises at least one microfractured inorganic layer comprising a plurality of toolmarks interspersed with cracks, wherein the microfractured inorganic layer is about 3 nanometers to about 200 nanometers thick; and wherein the transfer article has a thickness of less than 3 micrometers.

2. The transfer article of claim 1 , wherein the microfractured inorganic layer comprises about 0.3 to about 10000 cracks per mm 2 .

3. The transfer article of claim 1 , wherein the toolmarks in the microfractured inorganic layer are chosen from impressed marks, striation marks, cut marks, and combinations thereof.

4. The transfer article of claim 1 , further comprising a low modulus layer overlaying the functional layer, wherein the low modulus layer has a modulus of about 50 MPa to about 1000 MPa.

5. The transfer article of claim 4 , wherein the low modulus layer is an adhesive layer.

6. The transfer article of claim 1 , wherein the functional layer comprises a plurality of inorganic layers separated by insulating layers, and wherein at least one inorganic layer of the plurality of metal and metal oxide layers is the microfractured layer.

7. The transfer article of claim 1 , further comprising an adhesive layer overlaying the functional laver.

8. The transfer article of claim 1 , wherein the microfractured inorganic layer further comprises a pattern superimposed thereon, the pattern comprising toolmarks with a period of less than about 750 microns.

9. The transfer article of claim 1 , wherein the functional layer comprises
a stack of metal layers.

10. The transfer article of claim 9 , wherein at least one of the metal layers in the functional layer is between barrier layers.

11. The transfer article of claim 1 , wherein the functional layer comprises
a second acrylate layer and a stack of metal layers and metal oxide layers on the second acrylate layer, wherein the stack of metal layers comprises at least one microfractured silver or silver oxide layer comprising a plurality of toolmarks interspersed with cracks; and further comprising
a substrate on the functional layer, wherein the substrate comprises a polymeric film.

12. The transfer article of claim 11 , wherein the polymeric film comprises PETg.

13. The transfer article of claim 1 , wherein the functional layer comprises
second acrylate layer and a stack of metal layers and metal oxide layers on the second acrylate layer, wherein the stack of metal layers comprises at least one microcracked metal layer comprising a plurality of metal flakes interspersed between crevasses, wherein at least a portion of the metal flakes reside out of a plane of the microcracked metal layer, and wherein the crevasses have an average width of about 1 micron to about 50 microns.

14. The transfer article of claim 13 , wherein the functional layer comprises a stack of acrylate layers and one of metal layers and metal oxide layers, wherein the metal layers and metal oxide layers have different thicknesses.

15. The transfer article of claim 1 , further comprising: a polymeric film substrate on a side of the first acrylate layer opposite the functional layer; and a layer of an optically clear adhesive overlaying the polymeric film substrate; and wherein the functional layer comprises
a second acrylate layer and a stack of metal layers and metal oxide layers on the second acrylate layer, wherein the stack of metal layers comprises at least one microfractured metal layer comprising a plurality of toolmarks interspersed with cracks.

16. The transfer article of claim 15 , wherein the article is reflective at wavelengths from 400-750 nm and at least partially transparent at wavelengths of greater than about 830 nm.

17. The transfer article of claim 15 , wherein the metal oxide layers comprise a metal chosen from NbOx, SiAlOx, and combinations thereof.

18. A method for making a patterned article, the method comprising:
removing a transfer article from a release layer chosen from a metal layer or a doped semiconductor layer, the transfer article comprising:
a first acrylate layer overlaying the release layer, wherein a release value between the release layer and the first acrylate layer is from 2 to 50 grams/inch, and
a functional layer overlaying the first acrylate layer, wherein the functional layer comprises at least one inorganic layer; and
contacting the first acrylate layer with a tool comprising structures having a period of less than about 200 microns to form a plurality of toolmarks interspersed with cracks in at least one inorganic layer in the functional layer to provide a patterned article with a microfractured inorganic layer.

19. The method of claim 18 , further comprising laminating the functional layer of the transfer article to a layer of a low modulus material with a modulus of less than about 1000 MPa to form a patternable construction.

20. The method of claim 19 , wherein the layer of the low modulus material comprises an adhesive.

Assignees

• 3M Innovative Properties Company

Inventors

• Gotrik Kevin W
• Jones Scott J
• Tai Huiwen
• Frankel Joan M
• Owings Robert R
• Velamakanni Bhaskar V
• Bruss Jeanne M
• Rowe David J
• Sousa Matthew E
• Givot Bradley L

Classifications

• B44C1/1708 Primary

  Decalcomanias provided with a layer being specially adapted to facilitate their release from a temporary carrier (B44C1/172, B44C1/1741 take precedence) · CPC title

• C23C14/5886

  Mechanical treatment (involving removal of material C23C14/588) · CPC title