Patent ID: 6499823
Filing Date: 2002-12-31
Classification: B41J

Abstract:
An ink jet recording head comprising:a substrate having an element surface provided with energy generating elements for generating energy to be used for discharging ink; a ceiling plate provided with a grooved surface having grooves to become ink passages corresponding to said energy generating elements, said grooved surface and said element surface being bonded to form said ink passages; a base plate for supporting said substrate from a side opposite to said element surface; and an ink supply member being in contact with said base plate at a contact portion, having an ink flow path wall face to be communicated with said ink passages, wherein said base plate and said ink supply member pinch said substrate and said ceiling plate at said contact portion as a fulcrum so as to enable said base plate to press said substrate from the side opposite to said element surface, and said ink supply member to press said ceiling plate from a side opposite from said grooved surface, and wherein said ink supply member and said base plate are formed of the same material, and said substrate and said ceiling plate are formed of the same material, and the difference between the linear expansion coefficients of said ink supply member and said base plate, and the linear expansion coefficients of said substrate and said ceiling plate is smaller than the difference between the linear expansion coefficient of metal and the linear expansion coefficients of said substrate and said ceiling plate.