| 摘要 |
PROBLEM TO BE SOLVED: To prevent a bubble from staying in an ink supply hole of a support member supporting an inkjet recording head even when the bubble enters the ink supply hole, thereby stably ejecting a predetermined amount of ink drop. SOLUTION: An ink supply hole 11 of a support member 10 made of a ceramic for supporting the inkjet recording head 2 consists of a long hole 12 which is opened to a side of the inkjet recording head 2 and has an inclined bottom 13 becoming deeper toward the center and a hole 11 having a small diameter and communicating with the long hole 12. A surface roughness of at least the inclined bottom face 13 of the ink supply hole 11 is made to be in the range of 0.4-1.0μm in an arithmetic mean roughness (Ra) and a void coefficient is made to be in the range of 5-30%. COPYRIGHT: (C)2003,JPO
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