Patent ID: 6270197
Filing Date: 2001-08-07
Classification: B41J

Abstract:
A micro-injecting device, comprising:a substrate;a protection film formed on said substrate;a heating resistor layer formed on a portion of said protection film, for heating a heating chamber;an electrode layer formed on said protection film and which contacts said heating resistor layer, for transmitting an electric signal to said heating resistor layer;a heating chamber barrier layer formed on said electrode layer and defining a heating chamber enclosing said heating resistor layer, said heating chamber having an axis, said heating chamber for holding a working liquid;a membrane formed on the heating chamber barrier layer for transmitting volume changes of the liquid in the heating chamber, said membrane comprising:an organic film formed over an entire heating chamber barrier layer and covering the heating chamber; andan impact film formed on a portion of said organic film, said impact film centered on an axis of the heating chamber;a liquid chamber barrier layer formed on a portion of the membrane and defining a liquid chamber, said liquid chamber being coaxial with said heating chamber and a center of said impact film; anda nozzle plate formed on said liquid chamber barrier layer, said nozzle plate having a nozzle coaxial with said liquid chamber.