Imprint method

Patent metadata

Field	Value
Publication number	US-9481114-B2
Application number	US-201514620793-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Apr 14, 2011
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

An imprint method using a mold includes the steps of applying on a substrate a resin composed of a mixture of an ultraviolet curable resin cured with ultraviolet light and a luminescent material that undergoes fluorescence or phosphorescence upon receiving ultraviolet light, imprinting the mold into the resin applied to the substrate, curing the resin applied to the substrate using ultraviolet light, releasing the mold from the substrate imprinted with the pattern, and detecting light from any residual resin remaining on the mold. The imprint method can use an imprint apparatus that includes a light-emission detecting unit configured to detect light emitted from the luminescent material. After the mold is released from the resin on the substrate, the detecting step can use the light-emission detecting unit to detect light emitted from any residual resin remaining in a concave and convex portion of the pattern formed on the mold.

First claim

What is claimed is:

1. An imprint method of forming a pattern of a resin on a substrate using a mold, the imprint method comprising:
a preparing step of preparing a resin composed of a mixture of an ultraviolet curable resin that becomes cured by receiving ultraviolet light and a luminescent material that undergoes fluorescence or phosphorescence upon receiving ultraviolet light;
an applying step of applying the resin prepared in the preparing step on the substrate;
an imprinting step of imprinting the mold into the resin after the applying step;
a curing step of curing the resin imprinted with the mold in the imprinting step using ultraviolet light;
a releasing step of releasing the mold from the substrate that has been imprinted with the pattern after the curing step; and
a detecting step of detecting fluorescence or phosphorescence emitted from the cured resin that remains on the mold, based on the received ultraviolet light, after the releasing step.

2. The imprint method according to claim 1 , further comprising a determining step of determining whether or not any residual resin is present in the pattern formed on the mold based on the result of the detection.

3. The imprint method according to claim 2 , further comprising an outputting step of outputting an error in a case where the determining step determines that any residual resin is present on the mold.

4. The imprint method according to claim 1 , wherein:
the mixture further includes a mold release agent-labeling material or a stress luminescent material having a light-emission wavelength different from that of the luminescent material, and
the detecting step detects light from the luminescent material using an optical filter.

5. The imprint method according to claim 1 , wherein the mixture further includes an another luminescent material having a light-emission wavelength different from that of the luminescent material.

Assignees

• Canon Kk

Inventors

• Hashimoto Tsutomu

Classifications

• B29K2995/0018

  having particular optical properties, e.g. fluorescent or phosphorescent · CPC title

• B29K2105/0032

  Pigments, colouring agents or opacifiyng agents · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• B29C59/02

  by mechanical means, e.g. pressing {(B29C59/007 takes precedence; embossing expanded porous articles B29C44/5627)} · CPC title

• B29C59/005

  characterised by the choice of material · CPC title