Coating processes – Electrical product produced – Resistor for current control
Patent
1995-01-10
1997-03-11
Padgett, Marianne
Coating processes
Electrical product produced
Resistor for current control
427103, 427593, 427265, 437904, B05D 512, C23C 1600
Patent
active
056099100
ABSTRACT:
A heater array for an ink jet printhead includes an insulating substrate, which can be a layer of ceramic, flexible plastic, insulated flexible metal, polysilicon, or single crystalline silicon. A first material layer is deposited atop the insulating substrate and patterned in parallel stripes. A first insulating layer is deposited atop the first material layer and patterned with contact windows above the first material layer in corresponding desired heating locations, usually in a symmetrical grid. A second material layer is deposited atop the first insulating layer and pattern in parallel stripes orthogonal to those in the first material layer. The first and second material layers are in physical and electrical contact with each other through the contact windows in the first insulating layer to form a resistive diode junction at each desired heating location. The entire surface of the heating array is covered with a second insulating layer, with contacts provided to the first and second material layers.
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Hewlett--Packard Company
Padgett Marianne
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