| 摘要 |
A nozzle plate of an ink jet printing head is formed so that its surface facing toward the ink drop discharge direction will have protruding parts around each of its nozzle holes. Each protruding part is formed in the shape of a circle that is concentric with a corresponding nozzle hole, and the outer edge of the protruding part is formed so as to have an appropriate slope. Due to the configuration of the nozzle plate, a wiper blade can make good contact with the surface (protruding parts) of the nozzle plate around the nozzle holes and ink around the nozzle holes can be cleaned successfully in wiping operation, thereby the ink drop discharge properties of the ink jet printing head can be stabilized and improved. Such a configuration of the nozzle plate is realized by electrodeposition without using a photoresist. Therefore, the shape of the nozzle hole is not affected by the coating status of the photoresist, th e precision of a patterning image which is used for the exposure and development, the precision and life of a mask, etc. Therefore, the dimensional accuracy (diameter, roundness, etc.) of the nozzle holes can be improved, manufacturing yield of the ink jet printing heads can be increased, manufacturing costs can be reduced, and high quality printing can be realized.
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