摘要:
A process for preparing oriented semiconductor monocrystalline rods with a specific resistance which drops towards the center of the rod. The process utilizes rapid non-crucible moving zone melting of a preformed vertically positioned semiconductor rod using an inductive heating device which annularly surrounds the rod.
摘要:
Method and apparatus for controlled doping of semiconductor crystals whereby a semiconductor crystal is enclosed in a housing and a floating melt zone is established along the length thereof while simultaneously controlled volumes of a gaseous doping substance is directed by a conduit to the melt zone for diffusion within the resolidified semiconductor crystals. The volume of doping substance supplied to the crystal is regulated by combination pressures and feed rates, such as by combination of at least two valves having a constant volume chamber therebetween and a program that adjusts the pressure of the dopant supply above the pressure surrounding the crystal melt zone and regulates the frequency of valve operations per unit time. The invention is especially useful for producing n-doped silicon crystals.
摘要:
Device for zone melting a crystalline member includes a vessel, an electrically energizable heating device mounted in the vessel for heating a melting zone formed in a crystalline member, and an electric current supply for the heating device extending into the vessel through an opening formed in a wall of the vessel, the supply comprising at least two conductors insulated from one another by an intermediate layer of insulating material having a Shore hardness in the range of 10 to 100 and an extensibility of at least 20 percent, a gas-tight adhesive connection being provided between the intermediate layer of insulating material and the surface of the conductors.
摘要:
Method of zone melting a semiconductor rod includes displacing an end holder of the vertically held rod transversely to the rod axis, continuously displacing the other end holder vertically so as to feed a rod portion, having a diameter greater than the inner diameter of an annular heating device surrounding the rod and forming a melting zone therein, into the melting zone, forming a diametrical constriction in the melting zone, displacing the one end holder vertically and rotating it until the rod portion located between it and the melting zone is formed to a specific diameter larger than the inner diameter of the heating device and, after forming the rod portion to the specific cross section, vertically displacing the end holders elative to the heating device.
摘要:
Device for crucible-free zone melting a crystalline rod includes a zone-melting chamber having a sidewall formed with a substantially vertical slot, heating means extending through said slot into said chamber and energizable for forming a melting zone in a substantially vertically supported crystalline rod mounted in said chamber, slide means located adjacent said sidewall and carrying said heating means, said slide means and said heating means being slidable together relative to the rod in the direction of the rod axis whereby the melting zone is passed through the rod, and an elastically deformable sealing strip mounted between said slide means and said sidewall of said zone melting chamber and completely surrounding said slot whereby said slot is gastightly sealed, said sealing strip being secured against displacement.
摘要:
An electric current supply line including a pair of parallel conductor elements separated one from another by a hollow dielectric tube, such as composed of quartz or a ceramic and layers of a filler material, for example, silicone rubber, between contiguous metallic surfaces and dielectric surfaces.
摘要:
An induction heat coil arrangement, in particular an apparatus for the crucible-free zone melt treatment of a semiconductor rod, including at least two hollow turns with a conduit for guiding a heatexchange fluid contained therein. The outer turn comprises a bent metal tube which is provided with a heat-resistant insulator sleeve to avoid arcings which are detrimental to the induction heat coil arrangement itself as well as to the quality of the semiconductor rod.
摘要:
A readily disassembleable and easily producible induction coil useful in crucible-free floating melt zone treatment of semiconductor rods comprised of a single or multi-turn induction coil provided with a separable ring-shaped insert which has onehalf thereof rigidly attached to an inner surface of the coil and another half separably attached to the first half with the end surfaces of the insert halves being located perpendicularly to the plane of the coil. A conduit is disposed within the insert for guiding a heat-exchange fluid therethrough.
摘要:
Combination in apparatus for producing rod-shaped members of crystalline material includes a sealed receptacle having a top wall, bottom wall and lateral wall portions, a pair of rod holders located in the receptacle substantially along the vertical central axis of the receptacle for supporting a rodshaped member of crystalline material therebetween, heating means mounted in the receptacle for producing a melting zone in the rod-shaped crystalline member, the heating means and the holders being displaceable relative to one another for passing the melting zone along the rod-shaped crystalline member, and drive means extending into the receptacle through a wall portion other than the bottom wall portion from a location outside the receptacle for moving the holders and the heating means relative to one another.