Oriented multi-layer thin film of ferrodielectric substance and

Details Oriented multi-layer thin film of ferrodielectric substance and Oriented multi-layer thin film of ferrodielectric substance and

1993-06-09

1996-06-11

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428693, 428694R, 428694SC, 428694XS, 428694T, 428694TM, 428900, G11B 566, B32B 900

Patent

active

055254349

ABSTRACT:
Disclosed is an oriented multi-layer ferrodielectric substance thin film which comprises: a first ferrodielectric substance layer of oriented crystals formed on a monocrystal substrate, the first ferrodielectric substance layer having a surface which is high in density and which is high in refractive index equivalently to that of a monocrystal but which is not smooth optically; and a second ferrodielectric substance layer of oriented crystals formed on the first ferrodielectric substance layer, the second ferrodielectric substance layer having a surface which is lower in density than the first ferrodielectric substance layer and which is lower in refractive index than a monocrystal but which is smooth optically. Further disclosed is a method of producing the above oriented multi-layer ferrodielectric substance thin film which comprises the steps of: applying a solution of organic metal compound onto a monocrystal substrate; applying heat treatment onto the monocrystal substrate covered with the solution of organic metal compound; and repeating the above steps of application of the organic metal compound solution and application of heat treatment by a plurality of times, the repetition of heat treatment being carried out at temperatures different from each other.

REFERENCES:
"Epitaxial LiNbO.sub.3 thin films prepared by a sol-gel process", Nashimoto, K. and Cima, M. J., Materials Letters, vol. 10, No. 7, 8, pp. 348-354, Jan. 1991.

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