SEEDS FOR GROWING QUARTZ MONOCRYSTAL (VERSIONS) Russian patent published in 2002 - IPC

FIELD: devices for growing monocrystals from solution by means of pressure by hydrothermal method in production of seed plates at small number of dislocations. SUBSTANCE: seed includes base seed and additional components mechanically connected with said seed at angle of α = 90 deg. or 90^°<α (versions I and II) or at angle α = 180^° (version III). Base seed may have ZY-cut or XY-cut and additional components have ZY-cut or ZX-cut or YX-cut for version I, YX-cut or YZ-cut or ZX- cut for version II, ZY-cut or XY-cut for version III; they may also have twinned zones for all versions. Additional components may be mechanically connected with base seed at abut or overlap connection; they may be also secured to it on sides. Sectional form of seed as base seed of ZY-cut or XY-cut and additional components with said cuts for three versions and angles of attachment makes it possible to grow crystal along axis X irrespective of sizes of base seed and limitation in sizes (at limitation of sizes of autoclave only) which is sufficient for industrial application and to increased useful dislocationless zone in seed. EFFECT: enhanced efficiency. 19 cl, 3 dwg