| 摘要 |
A substrate ( 10; 110; 210; 310 ) for an ink jet printhead comprising: at least three slots ( 12 a, 12 b, 12 c) of elongated shape, oriented parallel to one another lengthwise in a vertical direction ( 13 ); three corresponding actuating banks ( 16 a, 16 b, 16 c); a plurality of drive circuits ( 18 ); and a plurality of terminals ( 21, 21 a, 21 b), lesser in number than the ejection actuators ( 16 ), connected to the drive circuits ( 18 ) for receiving external signals, wherein at least two ( 12 a, 12 b) of the three slots are arranged side by side along the respective long edges in an upper portion ( 10 a) of the substrate, and the third slot ( 12 c) is arranged in a lower portion ( 10 b) of the substrate, and wherein moreover the terminals ( 21 ) connected to the drive circuits are arranged in a line along the edges ( 11 a, 11 b) of the substrate ( 10 ) parallel to the slots and therefore to this given vertical direction ( 13 ). This substrate has a robust structure and is less likely to crack in the zone of the slots.
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