System for soft lithography
A transfer sheet placed between a vacuum chuck and a stamp in a soft lithography aligner facilitates three dimensional manufacturing with elastomeric materials.
1. An aligner comprising:
A vacuum chuck for releasably holding a transfer sheet and an elastomeric stamp; a substrate support for holding a substrate to be contacted by said elastomeric stamp; and
said transfer sheet made of a polymer material; wherein,
the vacuum chuck and the substrate support can be translated and rotated with respect to one another,
the transfer sheet separates the vacuum chuck from said elastomeric stamp;
the transfer sheet is smooth such that it can be tightly gripped or easily released by the vacuum chuck, and,
the transfer sheet is thin and flexible such that it can be easily peeled from a sticky elastomeric surface of said elastomeric stamp using less force than is required to separate said stamp from the substrate.
2. The aligner of claim 1 further comprising a microscope for observing said stamp and a sample substrate.
3. The aligner of claim 1 wherein the vacuum chuck comprises concentric channels.
4. The aligner of claim 1 wherein the vacuum chuck comprises parallel channels.
5. The aligner of claim 1 wherein the transfer sheet is made of polyester.
6. The aligner of claim 1 wherein the transfer sheet is made of acetate.
7. The aligner of claim 1 wherein the transfer sheet is made of polyvinyl chloride.
8. The aligner of claim 1 wherein the transfer sheet is made of polyethylene.
9. The aligner of claim 1 wherein the transfer sheet is made of polytetrafluoroethylene.
10. An aligner comprising:
A magnetic chuck for releasably holding a transfer sheet and an elastomeric stamp;
a substrate support for holding a substrate to be contacted by said elastomeric stamp; and
said transfer sheet made of metal foil; wherein,
the magnetic chuck and the substrate support can be translated and rotated with respect to one another,
the transfer sheet separates the magnetic chuck from said elastomeric stamp;
the transfer sheet is smooth such that it can be tightly gripped or easily released by the magnetic chuck, and,
the transfer sheet is thin and flexible such that it can be easily peeled from a sticky elastomeric surface of said elastomeric stamp using less force than is required to separate said stamp from the substrate.