US Patent 7316469 Ink-jet head

An ink-jet head includes a first passage forming member, a second passage forming member, and a circuit board. The first passage forming member has an ink inlet port, an ink outlet port, and a first ink passage extending from the ink inlet port to the ink outlet port. The first passage forming member is sandwiched between the circuit board and the second passage forming member. An electronic element is mounted on the circuit board. A projection defining a recess is formed on a surface of the first passage forming member. The electronic element is mounted on position facing the recess of the circuit board, and is received therein.