Fluid handling device with filter and fabrication process theref

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

1988-09-22

1989-09-05

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

156644, 210483, 346 11, G01D 1516, B41J 304

Patent

active

048643297

ABSTRACT:
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.

REFERENCES:
patent: Re32572 (1988-01-01), Hawkins et al.
patent: 3606973 (1971-09-01), Davis
patent: 4251824 (1981-02-01), Hara et al.
patent: 4380770 (1983-04-01), Maruyama
patent: 4514743 (1985-04-01), Roschlein
patent: 4571599 (1986-02-01), Rezanka
patent: 4639748 (1987-01-01), Drake et al.
patent: 4673955 (1987-06-01), Ameyama et al.
patent: 4678529 (1987-07-01), Drake et al.
patent: 4789425 (1988-12-01), Drake
patent: 4814786 (1989-03-01), Hoisington
Kendall et al.; Combined Nozzle and Filter Assembly and its Fabrication, IBM TDB, vol. 22, No. 8A, Jan. 1980, pp. 3441-3442.

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