摘要:
A process of making thermoelectric coolers by direct printing of n- and p-type semiconductor materials suitable for making thermoelectric coolers is disclosed. Micro Jet Printing of arrays on n and p-type materials belong to conductive site pads on non-conductive substrate and crystalization of these materials in the preferred direction as they cool produces thermoelectric cooler components without the need for sawing and machining operations. A non-conductive top substrate having conductive bonding pads is secured to the tops of the columns n and p-type semiconductor materials thereby forming an electrical and physical bond to make a thermoelectric cooler package.
摘要:
A vertically oriented rotatable drum includes a receptacle centrally disposed therein. Positioning means disposed within the annulus defined by the drum and receptacle side walls are adapted to confine a substrate against vertical movement while permitting lateral movement. The direction of such movement is determinable by densities of materials handled and drum speed. Means communicate the receptacle with the annular region whereby fluid material may coat alternate sides of the laterally shifting substrate.
摘要:
An epitaxial layer of a semiconductive material is deposited on a substrate in a furnace boat having a well and a cup-shaped piston fitting in the well with the piston having a small hole in its top end. A heated solution of the semiconductive material dissolved in a molten metal solvent is provided in the well. The piston is pressed down against the solution to force some of the solution through the hole in the piston onto the top end of the piston. As the solution passes through the hole in the piston the solution is scraped clean of contaminants. The substrate is placed against the cleaned portion of the solution on the top end of the piston and the solution is cooled to deposit an epitaxial layer of the semiconductive material onto the substrate.
摘要:
A mixture (liquid or solid), including a solvent, a solute (comprising the constituents of a crystal to be grown), and any desired dopant, is placed in a drum rotatable on a major (and preferably generally vertical) axis. Substrates are mounted in the drum above the mixture level. The mixture is heated to dissolve the solute and form a solution. The solution is moved over and covers the substrates via a centrifugally induced forced vortex by rotating the drum. The system is controllably cooled, or otherwise affected, to effect crystal growth on the substrate. Expedients are provided to accomodate substrates both denser than and less dense than the solution and to obviate undesirable effects of contaminants in the solution. Defects in the grown crystals caused by temperature gradients, solution concentration gradients and turbulence are also obviated by appropriate facilities.
摘要:
An apparatus and method for the growth of thin epitaxial layers on crystalline substrates. A portion of the growth surface of a substrate held at temperature T.sub.2 is contacted with a solution with a saturation temperature T.sub.s in a narrow channel while the solution is in streamline flow in the channel. The substrate is mounted on a slider. As the slider is moved across the narrow channel, progressively different portions of the growth surface are exposed to, and withdrawn from exposure to, the flowing solution. The rate of growth of epitaxial material on the growth surface of the substrate is determined by the relationship between T.sub.s, T.sub.2 and the temperature T.sub.1 of the solution as it enters the narrow channel. The thickness of the epitaxial layer on a portion of the growth surface is determined by the rate of growth of epitaxial material and the dwell time during which the portion of the growth surface is exposed to the flowing solution.
摘要:
A holder for liquid epitaxial growth includes a vertically slotted wall and a plurality of stacked recessed receptacles closely fitted within the holder and adapted to support the substrates. Each support is slotted through the peripheral wall thereof whereby to communicate the recess with the vertical slot. The loaded holder is contained in a crucible and pressurized means charge the crucible with the growth material.
摘要:
Apparatus and method for a crucible-less production of silicon ingots, wherein a support with a seed layer and a liquid layer is gradually lowered in a temperature field with a vertical gradient to solidify the liquid layer in a controlled way.
摘要:
An apparatus and a method for growth of material on substrates. A substrate at temperature T.sub.2 is placed with a surface in contact with solution in streamline flow through a narrow channel. The solution enters the channel with a temperature, T.sub.1, which is above its saturation temperature, T.sub.s, T.sub.2 is below T.sub.s, so material will deposit on the substrate surface. The flow of solution is maintained high enough to avoid the onset of constitutional supercooling.
摘要:
An apparatus and a method for the growth of an epitaxial layer on a substrate from a solution. Solution is brought into contact with a substrate in a narrow channel. Cooling fluid flowing through a second channel maintains the substrate temperature below the saturation temperature of the solution, and heating fluid flowing through a third channel maintains the wall of the narrow channel opposite the substrate above the saturation temperature of the solution.
摘要:
A method and apparatus for growing multiple epitaxial layers with at least two different compositions on a substrate from solutions. The substrate is mounted in a channel communicating with solutions of different compositions. A gas bubble located in the channel separates the solutions from each other. The different solutions are moved into sequential contact with the substrate in order to grow the epitaxial layers in the sequence desired, with a gas bubble sweeping across the substrate between sequential contact with the substrate of the different solutions.