Patent ID: 6513917
Filing Date: 2003-02-04
Classification: B41J

Abstract:
A liquid ejection device comprising:a substrate formed with a plurality of partition walls for defining a plurality of channels, each partition wall having an upper edge, each channel having a groove shape with an inner surface including a bottom surface, each two adjacent channels being separated from each other by a corresponding partition wall, each channel having, at at least one end thereof, a liquid ejection aperture for ejecting liquid filling the channel; a cover film, having a thickness of 5 &mgr;m or less, that is deposited over the upper edge of at least one of the plurality of partition walls, the cover film covering at least one of the plurality of channels; and a pressure applying structure that selectively deforms the cover film to apply pressure to liquid filling a desired channel, thereby ejecting liquid from the desired channel through its ejection aperture.