Ink jet print head

Details Ink jet print head Ink jet print head

1998-03-30

2000-08-08

Hartary, Joseph

Incremental printing of symbolic information

Ink jet

Ejector mechanism

216 27, 347 63, 347 71, B41J 201

Patent

active

060991062

ABSTRACT:
The ink jet print head is formed with many parallel ducts, which are etched isotropically through openings in a first layer located above the ducts. After the etching operation, the openings of the first layer are closed by the deposition onto the first layer of a second layer, which covers the openings. The openings have a diameter of 1 .mu.m, for instance. The openings, formed in the first layer by photolithography and ensuing dry etching, are disposed such that in an etching operation, the desired ducts underneath the first layer are laid bare. It is thus not necessary to adjust the relative positioning of two or more etched plates, closed ducts are formed without bonding or adhesive techniques, and the trigger circuit and the print head can be integrated on a single substrate.

REFERENCES:
patent: 5690841 (1997-11-01), Elderstig

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