Patent ID: 6257706
Filing Date: 2001-07-10
Classification: B41J

Abstract:
A micro-injection device, comprising:a substrate;a protective layer on said substrate;a heating layer formed on said protective layer;an electrode layer formed on said substrate and said heating layer, conducting electricity to the heating layer;a heating chamber barrier layer formed on said electrode layer and said heating layer, defining a wall of a heating chamber;a flexible oscillating layer formed on said heating chamber barrier layer and extending across said heating chamber, said oscillating layer defining a top of said heating chamber, said oscillating layer comprising:a first expansion layer containing a grooved region; anda second expansion layer disposed in said grooved region of said first expansion layer;a liquid chamber barrier layer formed on said oscillating layer and separated from said heating chamber by said oscillating layer, said liquid chamber barrier layer defining a liquid chamber; anda nozzle plate formed on said liquid chamber barrier layer, perforated by a nozzle and enabling communication between said liquid chamber and an environment external to said micro-injection device.