Abstract:
An apparatus for producing a single crystal of silicon comprises a plate with a top side, an outer edge, and an inner edge, a central opening adjoining the inner edge, and a tube extending from the central opening to beneath the bottom side of the plate; a device for metering granular silicon onto the plate; a first induction heating coil above the plate, provided for melting of the granular silicon deposited; a second induction heating coil positioned beneath the plate, provided for stabilization of a melt of silicon, the melt being present upon a growing single crystal of silicon. The top side of the plate consists of ceramic material and has elevations, the distance between the elevations in a radial direction being not less than 2 mm and not more than 15 mm.
Abstract:
An apparatus for producing a single crystal of silicon comprises a plate with a top side, an outer edge, and an inner edge, a central opening adjoining the inner edge, and a tube extending from the central opening to beneath the bottom side of the plate;a device for metering granular silicon onto the plate; a first induction heating coil above the plate, provided for melting of the granular silicon deposited;a second induction heating coil positioned beneath the plate, provided for stabilization of a melt of silicon, the melt being present upon a growing single crystal of silicon. The top side of the plate consists of ceramic material and has elevations, the distance between the elevations in a radial direction being not less than 2 mm and not more than 15 mm.
Abstract:
A method is provided for preparing, with high reproducibility, a carbon-doped group III-V compound semiconductor crystal having favorable electrical characteristics and having impurities removed therefrom, and in which the amount of doped carbon can be adjusted easily during crystal growth. This method includes the steps of: filling a crucible with compound raw material, solid carbon, and boron oxide; sealing the filled crucible within an airtight vessel formed of a gas impermeable material; heating and melting the compound raw material under the sealed state in the airtight vessel; and solidifying the melted compound raw material to grow a carbon-doped compound semiconductor crystal.
Abstract:
A metal halide for radiation detection, which is represented by the general formula ReALuBMe1-A-BXD where Re is at least one element among rare earth elements other than Lu, Me is at least one metallic element other than a rare earth element, X is a halogen, A+B
Abstract translation:用于放射线检测的金属卤化物,其由通式R 1,A 1,A 2,X D, 其中Re是Lu以外的稀土元素中的至少一种元素,Me是除稀土元素以外的至少一种金属元素,X是卤素,A + B <0.5,A <> 0,B < 0和1 <= D <= 6。
Abstract:
An apparatus for producing monocrystals having a relatively large cross-section by the Verneuil technique wherein a seed crystal is mounted on a movable crystal support member within a furnace means having a burner guiding flame gases and crystal growth material for impingement against the seed crystal so that the material melts and adheres to the seed crystal and forms a monocrystal which grows axially upwardly therefrom while the seed crystal member is moved axially downwardly a distance corresponding to the amount of axial crystal growth so that substantially uniform growth conditions are maintained throughout the growing process. A relatively massive flame deflector member having a central passage therein is positioned within a furnace means in spaced registry from the burner and radially about the crystal support member so as to deflect the flame gases laterally away from the growing crystal and to receive sufficient heat therefrom to form a heat reservoir for the growing crystal after flame shutdown. At least one axially movable insert member is positioned within the through passage of the deflector member and radially spaced from the crystal support member and the deflector member so as to be selectively movable in relation to the deflector member and the support member.
Abstract:
Novel single crystals of doped beryllium lanthanate having up to 50 atomic percent dopant substituted for lanthanum are provided which find advantageous use in optical applications and, in particular, as laser hosts.
Abstract:
A flame fusion process for the production of synthetic monocrystalline bodies which comprises horizontally supporting a monocrystalline rod at each end of its axis within a furnace, the rod having at least one radially enlarged portion thereon, passing powdered material of the same composition as the rod through a flame to fuse the same, directing the flame at the outer periphery of the radially enlarged portion of the rod thereby depositing and building up the fused material by crystallization on such outer periphery, rotating the rod about its axis at a rate fast enough so that the part of the outer periphery of the radially enlarged portion of the rod which is in contact with the flame is in the molten state thereby resulting in a radially outwardly enlarging crystal of increasing diameter and varying the distance between the flame and the outer periphery of the radially enlarged portion of the rod as the diameter of the crystal increases to maintain a predetermined relationship between the flame and such outer periphery.
Abstract:
This invention is directed toward a method and apparatus for producing fracture-free crystalline boules through a simultaneous growing and annealing technique. It involves a conventional flame-fusion crystal-growing process and apparatus modified to effect crystal growth by using a high temperature fusion flame within a controlled heated zone. The temperature of the zone is controlled in the top portion at a temperature sufficient to effect crystal growth and in the bottom portion at a temperature sufficient to effect a complete anneal of the grown crystal. The device of this invention comprises a conventional Verneuil type crystal growing apparatus modified by the addition of a high temperature furnace arranged concentrically around the growing chamber. The growing chamber comprises an elongated tube of high temperature resistant material, such as zirconia, positioned and aligned directly below a powder dispensing assembly and burner assembly. The growing chamber passes through the center of the furnace which includes a high temperature tungsten mesh heating element, heat shields and a water-jacketed cover.
Abstract:
A method and apparatus for manufacturing semiconductor bodies from germanium-silicon or molybdenum-silicon in which a homogeneous melt of the substance under treatment is made in a melting vessel which has a capillary opening in the bottom. A vertically movable receiver, such as a crucible, is mounted beneath the capillary opening, and a piston is movable up and down in the melting vessel above said capillary opening to press drops of the molten substance in said vessel out through said opening and into the receiver where said substance is solidified in crystalline form. The method and apparatus insure that the dropping sequence of said drops causes each consecutive drop to enter the receiver before the preceding drop has fully solidified.
Abstract:
RELATES TO A METHOD OF EPITACTIC PRECIPITATION OF MONOCRYSTALLINE SEMICONDUCTING MATERIAL, CRYSTALLIZING ACCORDING TO THE DIAMOND LATTICE OR THE ZINCBLENDE LATTICE, USING A MONOCRYSTALLINE SUBSTRATE, WHICH CRYSTALLIZES ACCORDING TO THE SPINEL TYPE. THE SUBSTRATE HAS MAGNETIC CHARACTERISTICS.