Patent ID: 6450620
Filing Date: 2002-09-17
Classification: B41J

Abstract:
An ink jet recording head comprising:a plurality of ejection outlets through which an ink is ejected; a top plate having a plurality of recesses and a plurality of walls defining a common ink chamber therein for containing the ink supplied to said plurality of recesses; and a substrate having an edge, said substrate being joined to said top plate, said substrate and said top plate together forming ink paths connected to said plurality of ejection outlets, said substrate having a thickness direction, said substrate being provided with energy generating means for generating energy to be used for ejecting ink through said plurality of ejection outlets, wherein a relationship m>1 is satisfied, where m is a width of said substrate in a direction in which said energy generating means are aligned, and 1 is a width of said common ink chamber in the same direction, and wherein said top plate overhangs from said edge of said substrate, said top plate having overhanging portions extending in the thickness direction of said substrate, said overhanging portions having an opening at a bottom of respective said overhanging portions such that said edge of said substrate is partly exposed through said opening, said substrate being disposed between said overhanging portions.