Ultra-conformal microprint and ultra-conformal microprint transferring

Patent metadata

Field	Value
Publication number	US-11745493-B2
Application number	US-202016988017-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 7, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A process for making an ultra-conformal microprint by ultra-conformal microprint transferring includes: disposing a transfer moiety arranged in a microstructure on a transfer substrate; disposing a glassy transfer layer on the transfer moiety; forming a glassy composite; removing the glassy composite from the transfer substrate while maintaining the microstructure of the transfer moiety in the glassy transfer layer; disposing the glassy composite on a microprint substrate; ultra-conformally covering the microprint substrate with the glassy composite by heating the glassy composite so that it flows while maintaining the microstructure of the transfer moiety in the glassy transfer layer so that the microstructure is disposed on the microprint substrate; and removing the glassy transfer layer while leaving the transfer moiety disposed in the microstructure on the microprint substrate to form the ultra-conformal microprint including the transfer moiety arranged in the microstructure on the microprint substrate.

First claim

What is claimed is:

1. A process for making an ultra-conformal microprint 200 by ultra-conformal microprint transferring, the process comprising:
disposing a transfer moiety 202 arranged in a microstructure 210 on transfer substrate 201 ;
disposing a glassy transfer layer 206 on the transfer moiety 202 ;
forming a glassy composite 207 comprising the glassy transfer layer 206 and transfer moiety 202 with maintaining the microstructure 210 of the transfer moiety 202 in the glassy transfer layer 206 ;
removing the glassy composite 207 from the transfer substrate 201 while maintaining the microstructure 210 of the transfer moiety 202 in the glassy transfer layer 206 ;
disposing the glassy composite 207 on a microprint substrate 208 ;
ultra-conformally covering the microprint substrate 208 with the glassy composite 207 while maintaining the microstructure 210 of the transfer moiety 202 in the glassy transfer layer 206 so that the microstructure 210 is disposed on the microprint substrate 208 ; and
removing the glassy transfer layer 206 by dissolving the glassy transfer layer while leaving the transfer moiety 202 disposed in the microstructure 210 on the microprint substrate 208 to form the ultra-conformal microprint 200 comprising the transfer moiety 202 arranged in the microstructure 210 on the microprint substrate 208 .

2. The process of claim 1 , further comprising:
forming a sacrificial layer 203 on the transfer substrate 201 prior to disposing the transfer moiety 202 and the glassy transfer layer 206 on the transfer substrate 201 ;
disposing the transfer moiety 202 arranged in the microstructure 210 on the sacrificial layer 203 ; and
forming the glassy composite 207 on the sacrificial layer 203 to form the glassy composite 207 on the sacrificial layer 203 such that the sacrificial layer 203 is interposed between the transfer substrate 201 and the glassy transfer layer 206 .

3. The process of claim 2 , further comprising:
removing the sacrificial layer 203 to separate the glassy composite 207 from the transfer substrate 201 prior to removing the glassy composite 207 from the transfer substrate 201 while maintaining the microstructure 210 of the transfer moiety 202 in the glassy transfer layer 206 .

4. The process of claim 3 , further comprising:
contacting the sacrificial layer 203 , while disposed on the transfer substrate 201 , with a first solvent that removes the sacrificial layer 203 to separate the glassy composite 207 from the transfer substrate 201 ,
wherein the glassy transfer layer 206 is immiscible in the first solvent.

5. The process of claim 4 , further comprising:
contacting the glassy transfer layer 206 , while disposed on the microprint substrate 208 , with a second solvent that removes the glassy transfer layer 206 from the microprint substrate 208 and leaves the transfer moiety 202 disposed in the microstructure 210 on the microprint substrate 208 .

6. The process of claim 1 , further comprising:
heating the glassy transfer layer 206 to flow the glassy transfer layer 206 onto the microstructure 210 to form the glassy composite 207 on the transfer substrate 201 .

7. The process of claim 1 , further comprising:
heating the glassy composite 207 to flow the glassy transfer layer 206 with the transfer moiety 202 on the microprint substrate 208 to ultra-conformally cover the glassy composite 207 on the microprint substrate 208 .

8. The process of claim 1 , wherein the glassy transfer layer 206 has a glass transition temperature.

9. The process of claim 8 , wherein the glass transition temperature of the glassy transfer layer 206 is from 1° C. to 50° C.

10. The process of claim 1 , wherein the glassy transfer layer 206 is miscible in a second solvent for which the microprint substrate 208 and the transfer moiety 202 are immiscible.

11. The process of claim 10 , wherein the second solvent that the glassy transfer layer 206 is miscible comprises water.

12. The process of claim 1 , wherein the transfer moiety 202 comprises a largest linear dimension that is less than 1 μm.

Assignees

• Government Of The Us Secretary Of Commerce
• Government Of The The Us Secretary Of Commerce

Inventors

• Zabow Gary

Classifications

• B41F19/08 Primary

  Simultaneous moulding and printing · CPC title

• B41M3/00 Primary

  Printing processes to produce particular kinds of printed work, e.g. patterns ({printing apparatus or machines of special type or for particular purposes B41F17/00;} special designs or pictures per se B44F; manufacturing printed circuits using printing techniques H05K3/12 {; manufacturing organic semiconductor devices using printing techniques H10K71/13}) · CPC title

• B05D2203/35

  Glass · CPC title