摘要:
A dislocation-free sheet may be formed from a melt. A sheet of material with a first width is formed on a melt of the material using a cooling plate. This sheet has dislocations. The sheet is transported with respect to the cooling plate and the dislocations migrate to an edge of the sheet. The first width of the sheet is increased to a second width by the cooling plate. The sheet does not have dislocations at the second width. The cooling plate may have a shape with two different widths in one instance. The cooling plate may have segments that operate at different temperatures to increase the width of the sheet in another instance. The sheet may be pulled or flowed with respect to the cooling plate.
摘要:
Techniques for shaping an ion beam are disclosed. In one particular exemplary embodiment, the techniques may be realized as an apparatus for shaping an ion beam. The apparatus may comprise an entrance electrode biased at a first voltage potential, wherein an ion beam enters the entrance electrode, an exit electrode biased at a second voltage potential, wherein the ion beam exits the exit electrode, and a first suppression electrode and a second suppression electrode positioned between the entrance electrode and the exit electrode, wherein the first suppression electrode and the second suppression electrode are independently biased to variably focus the ion beam.
摘要:
A method of controlling deflection of a charged particle beam in an electrostatic lens includes establishing a symmetrical electrostatic lens configuration comprising a plurality of electrodes disposed at unadjusted positions that are symmetric with respect to the central ray trajectory with applied unadjusted voltages that create fields symmetric with respect to the central ray trajectory. A symmetric electric field is calculated corresponding to the set of unadjusted voltages. A plurality of lower electrodes is arranged at adjusted positions that are asymmetric with respect to the central ray trajectory. A set of adjusted voltages is obtained for the plurality of lower electrodes, wherein the set of adjusted voltages corresponds to a set of respective potentials of the symmetric electric field at respective adjusted asymmetric positions. The adjusted voltages are applied to the asymmetric lens configuration when the charged particle beam passes therethrough.
摘要:
A melt of a material is cooled and a sheet of the material is formed in the melt. This sheet is transported, cut into at least one segment, and cooled in a cooling chamber. The material may be Si, Si and Ge, Ga, or GaN. The cooling is configured to prevent stress or strain to the segment. In one instance, the cooling chamber has gas cooling.
摘要:
An apparatus to purify a melt is disclosed. A first portion of a melt in a chamber is frozen in a first direction. A fraction of the first portion is melted in the first direction. A second portion of the melt remains frozen. The melt flows from the chamber and the second portion is removed from the chamber. The freezing concentrates solutes in the melt and second portion. The second portion may be a slug with a high solute concentration. This system may be incorporated into a sheet forming apparatus with other components such as, for example, pumps, filters, or particle traps.
摘要:
An apparatus to purify a melt is disclosed. A first portion of a melt in a chamber is frozen in a first direction. A fraction of the first portion is melted in the first direction. A second portion of the melt remains frozen. The melt flows from the chamber and the second portion is removed from the chamber. The freezing concentrates solutes in the melt and second portion. The second portion may be a slug with a high solute concentration. This system may be incorporated into a sheet forming apparatus with other components such as, for example, pumps, filters, or particle traps.
摘要:
A method of controlling deflection of a charged particle beam in an electrostatic lens includes establishing a symmetrical electrostatic lens configuration comprising a plurality of electrodes disposed at unadjusted positions that are symmetric with respect to the central ray trajectory with applied unadjusted voltages that create fields symmetric with respect to the central ray trajectory. A symmetric electric field is calculated corresponding to the set of unadjusted voltages. A plurality of lower electrodes is arranged at adjusted positions that are asymmetric with respect to the central ray trajectory. A set of adjusted voltages is obtained for the plurality of lower electrodes, wherein the set of adjusted voltages corresponds to a set of respective potentials of the symmetric electric field at respective adjusted asymmetric positions. The adjusted voltages are applied to the asymmetric lens configuration when the charged particle beam passes therethrough.
摘要:
A sheet measurement apparatus has a sheet disposed in a melt. The measurement system uses a beam to determine a dimension of the sheet. This dimension may be, for example, height or width. The beam may be, for example, collimated light, a laser, x-rays, or gamma rays. The production of the sheet may be altered based on the measurements.
摘要:
Techniques for measuring and controlling ion beam angle and density uniformity are disclosed. In one particular exemplary embodiment, the techniques may be realized as an apparatus for measuring and controlling ion beam angle and density uniformity. The apparatus may include a measuring assembly having an opening, a cup, and at least one collector at the rear of the cup. The apparatus may further include an actuator to move the measuring assembly along an actuation path to scan an ion beam to measure and control ion beam uniformity.
摘要:
This sheet production apparatus comprises a vessel defining a channel configured to hold a melt. The melt is configured to flow from a first point to a second point of the channel. A cooling plate is disposed proximate the melt and is configured to form a sheet on the melt. A spillway is disposed at the second point of the channel. This spillway is configured to separate the sheet from the melt.