| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink jet head having a hydrophilic discharge port face, the ink jet head coping with a discharge failure phenomenon newly found.SOLUTION: A discharge port face 107 is provided with a recess 102, and the inside of the recess 102 is provided with a discharge port 100 and an opening hole 101. Thus, The ink overflowing onto the discharge port face 107 is collected into a common liquid chamber 105 through the opening hole 101. |
