Method of fabricating a gas sensor and the product fabricated th

Details Method of fabricating a gas sensor and the product fabricated th Method of fabricating a gas sensor and the product fabricated th

1991-12-09

1993-12-28

Lusigan, Michael

Coating processes

Electrical product produced

Metal coating

427125, 427229, 427240, 427241, 4273766, 4273767, 4273833, 4273835, 4273837, 4274191, B05D 512

Patent

active

052737799

ABSTRACT:
A method of fabricating a gas sensor which comprises a substrate; a buffer layer coated on the substrate; at least one gas sensing layer arranged on the buffer layer; a pair of electrodes disposed on the gas sensing layer; and a catalytic layer coated on the gas sensing layer. A spin coating process is performed, using centrifugal force, to form the layers which are thin and evenly deposited on the substrate. The gas sensing layer of the gas sensor is formed before forming the electrodes of the same such that the heat treatment thereto can be carried out at 800.degree. C. which is much higher than the conventional temperature of 600.degree. C. The bonding of the gas sensing layer to the substrate is thereby much stronger than the conventional gas sensor.

REFERENCES:
patent: 4338356 (1982-07-01), Akimune et al.
patent: 4482581 (1984-11-01), Lorin et al.
patent: 4656455 (1987-04-01), Tanino et al.
patent: 4731257 (1988-03-01), Uchikawa
patent: 4741926 (1988-05-01), White et al.
patent: 5116643 (1992-05-01), Miller et al.
"Tin Oxide Gas Sensing Microsensors From Metallo-Organic Deposited (MOD) Thin Film" by Micheli et al, Ceramic Engineering, Sci. Proc. 8(9-10) pp. 1095-1105 (1987).

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