Recording head with through-hole wiring connection which is disp

Details Recording head with through-hole wiring connection which is disp Recording head with through-hole wiring connection which is disp

1993-05-20

1996-11-19

Hartary, Joseph W.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 64, B41J 205

Patent

active

055767486

ABSTRACT:
A recording device includes a substrate having both an ink discharge portion with openings for discharging ink and a liquid chamber for holding the ink for supply to the openings, and a wiring portion transmits signals to electro-thermal converting elements. The wiring portion includes several electroconductive layers, an interlayer insulating layer made of first and second insulating layers, and a protective layer. Some of the layers have through holes, and the through holes are disposed within the liquid chamber. Different electroconductive layers are electrically connected via a through hole formed in the interlayer insulating layer. The through hole size varies so that the hole in a second electroconductive layer is larger than the through hole in a first electroconductive layer.

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patent: 5045870 (1991-09-01), Lamey et al.
patent: 5081474 (1992-01-01), Shibata et al.
patent: 5157418 (1992-10-01), Tamura

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