Patent ID: 7045015
Filing Date: 2006-05-16
Classification: B05D,C23C,H05K

Abstract:
1. An apparatus for maskless mesoscale material deposition of liquids or liquid particle suspensions in patterns on a target, said apparatus comprising: a first module for and providing aerosolization of a liquid selected from one or more of molecular precursors and particle suspensions and for delivering aerosolized mist to a flowhead using a carrier gas; a second module for focusing said liquid into an aerosol stream for depositing aerosol droplets or particles, said second module comprising a flowhead, a cylindrical chamber comprising a multi-stage virtual impactor for reducing a carrier gas flowrate, a heating assembly for evaporating solvents to modify fluid properties of an aerosol stream, and a shutter for interrupting flow of material to said target for patterning; a control module for automated control and monitoring of process parameters; a laser delivery module, comprising a processing laser, a mechanical shutter, an acousto-optic modulator, one or more delivery optics, and a focusing head; a motion control module, comprising a motion control card, an I/O interface, a set of X-Y linear stages, a Z-axis, and one or more amplifiers; and a computer-controlled platen; wherein each stage of said virtual impactor comprises a disk-shaped insert with a cylindrical chamber opened at each end, an exit orifice of said chamber tapering to a diameter that is smaller than an entrance orifice of said chamber and opening to an area enclosed by a larger cylinder; and wherein said exit orifice of a first stage and said entrance orifice of a second stage are connected to ambient conditions through a plurality of port holes in said cylinder wall.