Fluid handling device with filter and fabrication process...

Details Fluid handling device with filter and fabrication process... Fluid handling device with filter and fabrication process...

B - Operations, Transporting

01

D

182/105, 26/160,

B01D 29/01 (2006.01) B41J 2/16 (2006.01) B41J 2/17 (2006.01) B41J 2/175 (2006.01)

Patent

CA 1321360

ABSTRACT OF THE DISCLOSURE Relatively small fluid handling devices having a filter bonded on the surface containing the fluid inlets. An example of such a device is a thermal ink jet printhead. A substantially flat filter is placed at the ink inlet to the printhead by a fabrication process which laminates a wafer sized filter to the aligned and bonded wafers containing a plurality of printheads. The individual printheads are obtained by a sectioning operation, which cuts through the two or more bonded wafers and the filter. The filter may be a woven mesh screen or, preferably, an electroformed screen with a predetermined pore size. Since the filter covers one entire side of the printhead, the relatively large contact area prevents delamination and enables convenient leak-free sealing. The filter prevents the entrance of contaminants into the relatively large inlets of the printhead at an early stage of assembly and packaging.

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