Imprint method, imprint apparatus, and method of manufacturing article
The present invention provides an imprint method of forming, using a mold, a pattern of an imprint material on a substrate having a dimension smaller than a dimension of a holding surface of a substrate stage, comprising: causing the holding surface to hold a plate; causing the plate to support the substrate, by causing the holding surface to hold the substrate by via the plate; bringing the mold into contact with the imprint material on the substrate; curing the imprint material on the substrate; and separating the mold from the cured imprint material, wherein holding of the plate by the substrate stage is controlled while maintaining supporting of the substrate by the plate, such that the substrate is deformed into a convex shape together with the plate upon in the separating.
1. An imprint method of forming, using a mold, a pattern of an imprint material on a substrate having a dimension smaller than a dimension of a holding surface of a substrate stage, the method comprising:
causing the holding surface of the substrate stage to hold a plate having a dimension larger than the dimension of the substrate;
causing the plate to support the substrate, by causing the holding surface of the substrate stage to hold the substrate via the plate;
bringing the mold into contact with the imprint material supplied onto the substrate;
curing the imprint material on the substrate; and
separating the mold from the cured imprint material,
wherein holding of the plate by the substrate stage is controlled while maintaining supporting of the substrate by the plate, such that the substrate is deformed into a convex shape together with the plate upon in the separating of the mold from the cured imprint material on the substrate.
2. The method according to claim 1 , wherein
the holding surface of the substrate stage includes a plurality of holding regions where a holding force of the plate can be individually adjusted, and
in the separating of the mold from the cured imprint material on the substrate, the holding force of the holding region, of the plurality of holding regions, corresponding to a portion of the substrate in contact with the mold via the imprint material is made smaller than the holding force of the other holding region.
3. The method according to claim 1 , wherein
the holding surface of the substrate stage includes a first holding region arranged at a position that overlaps the substrate, and a second holding region arranged around the first holding region, and
in the separating of the mold from the cured imprint material on the substrate, a holding force of the first holding region is made smaller than a holding force of the second holding region.
4. The method according to claim 3 , wherein
the plate includes a support region configured to support the substrate, and a communication path with which the support region and the second holding region communicate, and
the plate supports the substrate by a vacuum pressure supplied from the second holding region to the support region via the communication path.
5. The method according to claim 1 , wherein
the holding surface of the substrate stage includes a supply hole configured to supply a vacuum pressure to the plate, and
the plate includes a support region configured to support the substrate, and a communication path with which the support region and the supply hole of the substrate stage communicate, and
the plate supports the substrate by a vacuum pressure supplied from the supply hole to the support region via the communication path.
6. The method according to claim 5 , wherein
the holding surface of the substrate stage includes a plurality of holding regions where a holding force of the plate can be individually adjusted, and
the supply hole is arranged between the plurality of holding regions.
7. The method according to claim 5 , wherein
the holding surface of the substrate stage includes a plurality of holding regions where a holding force of the plate can be individually adjusted, and
the supply hole is arranged at a position surrounded by one holding region of the plurality of holding regions.
8. The method according to claim 1 , wherein
in each of the bringing the mold into contact with the imprint material on the substrate and the separating of the mold from the cured imprint material on the substrate, a gap between the mold and the holding surface of the substrate stage is controlled based on information concerning a height of the plate, such that the gap is offset by the height of the plate.
9. A method of manufacturing an article, the method comprising:
forming a pattern on a substrate by using an imprint method according to claim 1 ;
processing the substrate, on which the pattern has been formed, to manufacture the article.
10. An imprint apparatus that forms a pattern of an imprint material on a substrate using a mold, the apparatus comprising:
a substrate stage configured to hold a plate having a dimension larger than a dimension of the substrate; and
a controller configured to control bringing the mold into contact with the imprint material supplied onto the substrate, curing the imprint material on the substrate, and separating the mold from the cured imprint material,
wherein the dimension of the substrate is smaller than a holding surface of the substrate stage, and the substrate is supported by the plate by being held by the holding surface via the plate, and
the controller controls holding of the plate by the substrate stage while maintaining supporting of the substrate by the plate, such that the substrate is deformed into a convex shape together with the plate upon the separating of the mold from the cured imprint material on the substrate.