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US 5,180,463 AGranted
Method for forming coated monocrystalline products
AssigneeQuartz et Silice
InventorsJacques Le Moigne, Annette Thierry, Pierre Guerder
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AssigneeQuartz et Silice
InventorsJacques Le Moigne, Annette Thierry, Pierre Guerder
Estimating the term…
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.
A process for forming a coated monocrystalline product which comprises:
A process for coating an organic monocrystal with an oriented microcrystalline polydiacetylene layer which comprises:
A process for forming a coated monocrystalline product which comprises:
Dependencies are inferred from the claim text.