Patent ID: 6517198
Filing Date: 2003-02-11
Classification: B41J

Abstract:
A liquid ejecting head including a first liquid flow path communicating with an ejecting port for ejecting a liquid to be ejected and an element substrate having a heating element for forming a bubble from a bubble forming liquid as well as including a second liquid flow path corresponding to said first liquid flow path and a movable separation membrane for substantially separating said first liquid flow path and said second liquid flow path corresponding to said first liquid flow path from each other at all times, comprising:an atmosphere communication port facing the atmosphere for communicating said second liquid flow path with the atmosphere; and an atmosphere communication path having an atmosphere communication path introduction port facing said second liquid flow path, wherein said atmosphere communication port is formed through the same surface as that of said ejecting port, and wherein when said ejecting port has an area S0, said atmosphere communication port has an area S1 and said atmosphere communication path introduction port has an area S2, relationships of S01 and S21 are established.