Patent ID: 7217395

Claim:
A piezoelectrically controllable microfluid actor system, comprising: a planar substrate ( 2 ); at least one cavity ( 10 ) provided on at least one side of the substrate ( 2 ), the substrate ( 2 ) having at least one passage ( 11 , 13 ) having a first aperture opening into the cavity ( 10 ) and a second aperture opening to an opposite another side of the substrate ( 2 ); at least one diaphragm ( 4 ) having a perimeter border and supported above the at least one side of the substrate ( 2 ) at a distance therefrom at the perimeter border by support means ( 3 ) provided on the at least one side of the substrate ( 2 ), the at least one diaphragm ( 4 ) and the substrate ( 2 ) forming the cavity ( 10 ), wherein the at least one diaphragm ( 4 ) has at least two superposed and interconnected diaphragm layers ( 6 , 7 ), at least one of the diaphragm layers ( 6 , 7 ) being formed as an electrically controllable piezoceramic element deflectable into the cavity ( 10 ) by an electric drive, wherein the substrate ( 2 ) has a further passage ( 11 , 13 ) also having a first aperture opening into the cavity ( 10 ) and a second aperture opening to an opposite another side of the substrate ( 2 ), of which one of the first and second apertures is disposed centrally below the at least one diaphragm ( 4 ) to form a micro-diaphragm valve ( 1 ) of at least 2/2 way type.