Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1981-11-18
1983-08-23
Bernstein, Hiram H.
Stock material or miscellaneous articles
Composite
Of inorganic material
252364, 156624, 156DIG63, C30B 1902
Patent
active
044004451
ABSTRACT:
The manufacture of magnetic bubble devices typically involves a step of epitaxially depositing a layer of a garnet material on a substrate having suitable lattice parameters, e.g., layers of certain rare earth-iron garnets are conveniently deposited on a gallium-gadolinium garnet substrate. Deposition by liquid epitaxy has been preferred and, in particular, deposition from a melt comprising garnet materials in a PbO--B.sub.2 O.sub.3 flux.
According to the invention, garnet layers are epitaxially grown from a melt comprising a PbO--V.sub.2 O.sub.5 flux. Growth from such melt has desirably slow kinetics, resulting in slow deposition as is beneficial especially for the growth of layers on an assembly of substrates. Additional benefits are ease of removal of liquid droplets remaining on a grown film upon removal from the melt, both by spinning and by rinsing.
REFERENCES:
patent: 3790405 (1974-02-01), Levinstein
patent: 4165410 (1979-08-01), Blank
Wanklyn et al., "Solubility and Relative Supersaturation", published in J. of Cryst. Growth, vol. 49, pp. 182-188, Sep. 1979.
Blank et al., "Kinetics of LPE Growth", published in A.I.P. Conf. Proc., pp. 256-270, Oct. 1974.
Randles, "LPE Growth of Magnetic Garnets", in book Crystals by Springer-Verlag Press, N.Y., pp. 71-91, Nov. 1978.
Feigelson, "Flux Growth", published in J. of the Amer. Cerm. Soc., vol. 51, pp. 538-539, Sep. 1968.
Berkstresser George W.
Blank Stuart L.
Bell Telephone Laboratories Incorporated
Bernstein Hiram H.
Businger Peter A.
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