Bubble jet head and dubble jet apparatus employing the same

摘要

Each of branched ink supply passages (42ai to 42an and 42bi to 42bn) in a driving substrates (32) is constituted of a parallel passage portion (46a) and a narrow passage portion (48a). An ink from an ink supply opening (32a) is supplied to a receptacle portions (50) respectively receiving heater portions (32ai to 32an and 32bi to 32bn) via the branched ink supply passages (42ai to 42an and 42bi to 42bn). <IMAGE>