Patent ID: 6794208
Filing Date: 2004-09-21
Classification: B41J

Abstract:
A manufacturing method for a print head, in which a substrate member, which forms side surfaces and one end surface of ink-pressurizing cells and which is provided with heating elements, is laminated at a high temperature to a nozzle-formed member, which forms the other end surface of the ink-pressurizing cells and in which ink-ejection nozzles, which individually correspond to the ink-pressurizing cells, are formed, the manufacturing method for the print head comprising:laminating a correcting member, which has approximately the same coefficient of linear expansion as the substrate member, to the nozzle-formed member, so that the nozzle-formed member expands and shrinks in accordance with the coefficient of linear expansion of the substrate member when the temperature varies, wherein a nozzle-formed member having an interval L1 between the ink-ejection nozzles, at an operating temperature To at which the print head is used, is determined according to the following equation: L1=L2(1+&agr;2&Dgr;T)/(1+&agr;1&Dgr;T), wherein L2 represents a heater interval at the operating temperature To and also represents the nozzle interval after the print head is completed, &agr;1 represents the coefficient of linear expansion of the nozzle-formed member, &agr;2 represents the coefficient of linear expansion of the correcting member, T1 represents the laminating temperature of the nozzle-formed member and the correcting member, and &Dgr;T represents the difference between the laminating temperature T1 and the operating temperature To; andwherein the laminating of the correcting member is performed at a higher temperature than the laminating of the substrate member.