(57) A nozzle plate (21) of an ink jet printing head is formed so that its surface facing
toward the ink drop discharge direction will have protruding parts (40) around each
of its nozzle holes (1). Each protruding part (40) is formed in the shape of a circle
that is concentric with a corresponding nozzle hole (1), and the outer edge (41) of
the protruding part (40) is formed so as to have an appropriate slope. Due to the
configuration of the nozzle plate (21), a wiper blade (30) can make good contact with
the surface (protruding parts (40)) of the nozzle plate (21) around the nozzle holes
(1) and ink around the nozzle holes (1) 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 (21) is realized by electrodeposition
without using a photoresist. Therefore, the shape of the nozzle hole (1) is not affected
by the coating status of the photoresist, the 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 (1) 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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