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Information × Registration Number 0207U002149, 0106U007439 , R & D reports Title Development and introduction of manufacturing technology for substrates used in heterostructures basing on А3В5, designed for microwave devices. popup.stage_title Head Voronko Andrey, Registration Date 17-01-2007 Organization The closed Joint-stock Company "Research-and-production concern "Science" popup.description2 A technological scheme has been chosen which includes the following operations: etching, washing off quartz ampoules, preparation of initial elements, preparation of ampoules and vacuumation, synthesis with further slow cooling of flux. Peculiarity of the scheme consists in the fact that operation of synthesis and crystallization were performed consequently in one ampoule without its depressurization. Design of multiampoule plant has been improved in order to form lamellar gallium phosphide monocrystals: determined optimal difference of temperature between two maximally remote by diameter of ampoule dots. And also dependence of this difference from speed of screen spin. As a result of research of process of gallium phosphide monocrystal growing by means of crusibleless fusing, zone fusing there has been developed optimal design of secondary furnace, HF inductor and ampoule. Obtained monocrystallic bars more than 30 mm in diameter and 150 mm length, alloyed by tellurium to concentration of current carrier 3 1017 см-3 . Product Description popup.authors popup.nrat_date 2020-04-02 Close