Method for forming coated monocrystalline products

Details Method for forming coated monocrystalline products Method for forming coated monocrystalline products

1989-12-21

1993-01-19

Kunemund, Robert

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156600, 156613, 156DIG113, C30B 1900

Patent

active

051804638

ABSTRACT:
A polydiacetylene coating layer deposited upon an organic microcrystal. The coating has a large, uniform surface area which is monoriented and without cracks. The preferred embodiment utilizes for the monomer a layer of [1,6-di- n(carbazolyl)-2,4-hexadiyne] deposited by epitaxy onto an acid orthophthalate monocrystal of an alkali metal, ammonium or thallium. The process of the invention comprises cleaving the acid orthophthalate monocrystal along its (001) plane; depositing a diacetylenic monomer onto the cleaved face of the crystal by heat evaporation under vacuum conditions, and polymerizing the monomer upon the crystal face. The coated layer may thereafter be removed from the crystalline substrate by applying a composition such as, e.g., cabon or an acrylic polymer onto the coating to form a backing therefore and separating the resultant monoriented film from the crystal by at least partially immersing the coated crystal in water.

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J. Le Moigne et al., Thin Film Epitaxy of Diacetylenes on Inorganic or Organic Substrates: Structure and Non-Linear Properties of Polymer Films, SPIE, vol. 971, pp. 173-177 (1988).
109 Chem Abstracts (10), Sep. 5, 1988, p. 28, No. 74314W.
Rickert et al., "The Formation of Single Crystal Films of Polydiacetylenes", Mol. Cryst. Liq. Cryst. (93), pp. 307-314 (1983).
T. Kanetake et al., "Highly Oriented Polydiacetylene Films by Vacuum Deposition", Appl. Phys. Lett., 51 (23), pp. 1957-1959 (Dec. 7, 1987).

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