Patent ID: 6328429
Filing Date: 2001-12-11
Classification: B41J

Abstract:
An ink jet recording head comprising:a ceiling plate; anda substrate on a base plate substrate, having on the upper face thereof a plurality of discharge energy generating elements for discharging ink,said ceiling plate being provided with grooves to form a plurality of ink flow paths communicated with a plurality of ink discharge ports, respectively, and a recessed portion to form a common liquid chamber communicated with said plurality of ink flow paths, and when bonded with said substrate, the plurality of ink flow paths and said common liquid chamber being formed to discharge ink by means of said discharge energy generating elements for the execution of recording,whereinsaid base plate substrate is formed by a first base plate substrate and a second base plate substrate, and a thermal expansion coefficient of said first base plate substrate directly in contact with said substrate having said discharge energy generating elements arranged therefor is smaller than that of said second base plate substrate, and said first base plate substrate is formed by material having a thermal expansion coefficient closer to that of the substrate having said discharge energy generating elements arranged therefor, and said first base plate substrate, above which the discharge energy generating elements are placed, is supported by a surface of said second base plate substrate and a side face in the longitudinal direction of said second base plate substrate.