Patent ID: 7537679
Filing Date: 2009-05-26
Classification: G01N

Abstract:
1. A method of forming a classifier, comprising: providing a dielectric first layer; forming a bottom electrode on the dielectric first layer, wherein the bottom electrode comprises a metal or a semiconductor; forming a channel to border the bottom electrode, wherein the channel comprises a second dielectric layer; forming a porous filter medium in the channel, wherein the porous filter medium is made from silicon, silicon granules, dielectric powders, organic compounds, or metal powders; forming a top electrode above the porous filter medium, wherein the top electrode is selected from a metal and a semiconductor; and forming a third dielectric layer over the top electrode, forming a detector array in the channel, wherein the detector array is a capacitance detector, a surface-sensitive evanescent wave detector, a surface acoustic wave detector, or an optical detector.