Abstract: A continuous feed coater for coating a length of substrate with vaporized or sprayed material, is disclosed. A specific example is a roll-to-roll coater which includes two lower supply rollers for supporting two webs of uncoated material, and two upper take-up rollers for supporting the webs after they are coated. A central web-support forms a plenum that acts as a deposition chimney or chamber by bringing the two webs into close proximity to each other to form two large walls of the plenum. The ends of the webs are sealed using side dams to form the chimney with a rectangular cross section such that the vapor cannot exit from the edges of the material. The vaporized coating constituents to be deposited on the rolled material are directed into the deposition plenum from a coating material supply source located at the bottom of the plenum, and are exhausted through the top of the plenum.

Abstract: An organic self-assembled transistor uses an organic self-assembled monolayer as the active semiconductor layer in which the conducting channel is formed. The monolayer is exposed to the atmosphere; thereby making the voltage characteristics of the transistor, such as mobility and density of charge carriers, very sensitive to vapor molecules. The chemical specificity and strength of interaction of the monolayer is tuned by varying the chemical end group of the organic molecules comprising the monolayer. Varying the chemical end groups allows fabrication of large transistor arrays easily tailored for sensor array or electronic nose applications. The monolayer is also compatible with known low-cost VLSI silicon fabrication processes.

Abstract: A continuous feed coater for coating a length of substrate with vaporized or sprayed material, is disclosed. A specific example is a roll-to-roll coater which includes two lower supply rollers for supporting two webs of uncoated material, and two upper take-up rollers for supporting the webs after they are coated. A central web-support forms a plenum that acts as a deposition chimney or chamber by bringing the two webs into close proximity to each other to form two large walls of the plenum. The ends of the webs are sealed using side dams to form the chimney with a rectangular cross section such that the vapor cannot exit from the edges of the material. The vaporized coating constituents to be deposited on the rolled material are directed into the deposition plenum from a coating material supply source located at the bottom of the plenum, and are exhausted through the top of the plenum.