US Patent 7393259 - Electron emitter alignment using polymer gel

http://www.freepatentsonline.com/7393259.html

This patent from Samsung teaches an interesting method of placing and aligning carbon nanotubes (or other field emission material) on a substrate using a stimulated polymer film. Claim 1 reads:

1. A method of forming emitters, the method comprising:

forming a volume-changeable structure on an electrode, the volume-changeable structure including a polymer which reversibly swells and shrinks in response to an external stimulus;

injecting an electron-emitting material into the volume-changeable structure;

aligning the electron-emitting material; and

removing the polymer to form the emitters.