| 摘要 |
In a "top-shooter", thermal type colour ink jet printhead, the ducts bringing the different coloured inks to the corresponding groups of nozzles (13), through the silicon die (11) of the actuator assembly (10), consist of the combination of a slot (15) made starting from the lower face (21) of the die (11) by means of cutting performed by sandblasting; and a trench (14), wider and concentric with respect to the slot (15), made in the upper face (20) of the die (11) by means of chemical etching of the inductively coupled plasma (ICP) type, in such a way that the distance (18) between the slots (15) in the lower face (21) of the die (11) is greater than the distance (17) between the trenches (14), and accordingly between the groups of nozzles (13), on the upper face (20) of the die (11), thus permitting an optimal use of the surface area of the die (11) without compromising the sealing of the tanks.
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