Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1983-10-31
1985-08-13
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
G01D 1518
Patent
active
045353433
ABSTRACT:
A passivation layer in a thermal ink jet printhead is formed or "grown" by a reaction between the materials of the ink jet structure to be protected and an element which will form a chemically inert, electrically insulating, thermally conductive compound. The resistor structure may be of tantalum or tantalum nitride and the electrical conductors therefor may be of aluminum. By subjecting this resistor-conductor structure to a reactive oxide atmosphere, the exposed surfaces of both are anodized so that a surface film of aluminum oxide is formed on the aluminum conductor and a surface film of tantalum pentoxide or tantalum oxynitride is formed on the resistor structure.
REFERENCES:
patent: 4335389 (1982-06-01), Shirato
patent: 4336548 (1982-06-01), Matsumoto
patent: 4438191 (1984-03-01), Cloutier
Bearrs James G.
Chan C. S.
Hay Robert R.
Ura Frank
Wright Conrad L.
Hartary Joseph W.
Hewlett--Packard Company
MacAllister William H.
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