Large area dissolvable template lithography
A method and apparatus for patterning a substrate are provided. A template is formed by applying a precursor material to a patterned master substrate and curing or solidifying the precursor material. The template is detached from the master substrate using a carrier having a curved surface. The template is coated with a patterning material, and is then detached from the carrier and applied to the substrate to be patterned. The template is then dissolved without affecting the patterning material, and the patterning material may thereafter be finished to develop the pattern. In an alternate embodiment, the patterning material may be applied to the substrate and then imprinted using the template.
1. An apparatus for patterning a substrate, comprising:
a master substrate;
a substrate support; and
a template carrier movable between the master substrate and the substrate support, wherein the template carrier comprises a curved template contact surface having a width and a radius of curvature, wherein a ratio of the radius of curvature to the width of the contact surface is at least about 10:1.
2. The apparatus of claim 1 , wherein the substrate support comprises a landing zone for holding a template securely against the substrate support.
3. The apparatus of claim 1 , wherein the curvature of the template contact surface has one axis.
4. The apparatus of claim 1 , wherein the template carrier comprises an attachment zone configured to hold the template securely against the template carrier.
5. The apparatus of claim 1 , wherein at least one of the template carrier, the master substrate, and the substrate support comprises a force delivery member.
6. The apparatus of claim 5 , wherein the force delivery member comprises an electrical bias generating member.
7. The apparatus of claim 5 , wherein the force delivery member comprises a pneumatic member.
8. The apparatus of claim 2 , wherein the master substrate comprises a landing zone for forming an attachment portion of a template.
9. The apparatus of claim 1 , wherein the template carrier has a curved surface with more than one axis of curvature, and the template carrier comprises a pneumatic force delivery member.
10. An apparatus for creating a pattern on a substrate, comprising:
a substrate support comprising a landing zone for holding a cured template securely against the substrate support;
a source of curable template material positioned to deliver curable template material to a master substrate; and
a plate-like template carrier with one surface that has a slight curvature, wherein the plate-like template carrier receives a cured template from the master substrate.
11. The apparatus of claim 10 , wherein the template carrier is movable between the substrate support and the master substrate.
12. The apparatus of claim 10 , wherein the template carrier comprises a template fastener.
13. The apparatus of claim 12 , wherein the template fastener is a ring fastener.
14. The apparatus of claim 13 , wherein the template carrier further comprises a recess that mates with the ring fastener.
15. The apparatus of claim 14 , wherein the surface of the plate-like template carrier has a width and a radius of curvature, and a ratio of the radius of curvature to the width is at least about 10:1.
16. An apparatus for patterning a substrate, comprising:
two or more substrate supports; and
a plate-like template carrier movable among the two or more substrate supports, the template carrier having a mechanical template fastener and a curved template contact surface that is roughened.
17. The apparatus of claim 16 , wherein at least one of the template carrier and the substrate support comprises a force delivery member.
18. The apparatus of claim 17 , wherein the force delivery member comprises an electrical bias generating member.
19. The apparatus of claim 17 , wherein the force delivery member comprises a pneumatic member.