Ink jet printing device

Details Ink jet printing device Ink jet printing device

1995-08-11

1997-12-16

Lund, Valerie

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2178

Patent

active

056990944

ABSTRACT:
An ink jet printhead has improved resistance to the corrosive effects of ink by coating ink sensitive areas with a photo-imageable benzocyclobutene (BCB) polymer. The BCB can be patterned so as to provide a protective coating over selected areas while leaving other areas uncoated. In one described embodiment, a thermal ink jet printer is formed by bonding together a channel plate and a heater plate. Resistors and electrical connections are formed in the surface of the heater plate. A BCB layer is formed so as to overlie the heater plate to protect the electrical elements while providing pit structure for the heater and for ink flow bypass.

REFERENCES:
patent: 4638337 (1987-01-01), Torpey et al.
patent: 4774530 (1988-09-01), Hawkins
patent: 4829324 (1989-05-01), Drake et al.
patent: 4890126 (1989-12-01), Hotomi
patent: 5008689 (1991-04-01), Pan et al.
patent: 5539175 (1996-07-01), Smith et al.

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