摘要:
An ion source includes an arc chamber having an extraction aperture, and a plasma sheath modulator positioned in the arc chamber. The plasma sheath modulator is configured to control a shape of a boundary between a plasma and a plasma sheath proximate the extraction aperture, wherein the plasma sheath modulator includes a semiconductor. A well focused ion beam having a high current density can be generated by the ion source. A high current density ion beam can improve the throughput of an associated process. The emittance of the ion beam can also be controlled.
摘要:
Techniques for plasma processing a substrate are disclosed. In one particular exemplary embodiment, the technique may be realized with a method comprising introducing a feed gas proximate to a plasma source, where the feed gas may comprise a first and second species, where the first and second species have different ionization energies; providing a multi-level RF power waveform to the plasma source, where the multi-level RF power waveform has at least a first power level during a first pulse duration and a second power level during a second pulse duration, where the second power level may be different from the first power level; ionizing the first species of the feed gas during the first pulse duration; ionizing the second species during the second pulse duration; and providing a bias to the substrate during the first pulse duration.
摘要:
A plasma processing tool is used to deposit material on a workpiece. For example, a method for conformal deposition of material is disclosed. In this embodiment, the plasma sheath shape is modified to allow material to impact the workpiece at a range of incident angles. By varying this range of incident angles over time, a variety of different features can be deposited onto. In another embodiment, a plasma processing tool is used to etch a workpiece. In this embodiment, the plasma sheath shape is altered to allow ions to impact the workpiece at a range of incident angles. By varying this range of incident angles over time, a variety of differently shaped features can be created.
摘要:
A method of depositing and crystallizing materials on a substrate is disclosed. In a particular embodiment, the method may include creating a plasma having deposition-related species and energy-carrying species. During a first time period, no bias voltage is applied to the substrate, and species are deposited on the substrate via plasma deposition. During a second time period, a voltage is applied to the substrate, which attracts ions to and into the deposited species, thereby causing the deposited layer to crystallize. This process can be repeated until an adequate thickness is achieved. In another embodiment, the bias voltage or bias pulse duration can be varied to change the amount of crystallization that occurs. In another embodiment, a dopant may be used to dope the deposited layers.
摘要:
A method and apparatus are directed to providing a dopant profile adjustment solution in plasma doping systems for meeting both concentration and junction depth requirements. Bias ramping and bias ramp rate adjusting may be performed to achieve a desired dopant profile so that shallow and abrupt junctions in vertical and lateral directions are realized that are critical to device scaling in plasma doping systems.
摘要:
A method for ion implantation of a substrate includes forming a plasma from at least one implant material comprising at least one implant species, implanting the at least one implant species into a surface of the substrate, and directing at least one surface-modifying species at the surface to reduce a surface damage associated with the plasma. An apparatus for ion implantation is configured to implement this method.
摘要:
A method of plasma doping includes generating a plasma comprising dopant ions proximate to a platen supporting a substrate in a plasma chamber. The platen is biased with a bias voltage waveform having a negative potential that attracts ions in the plasma to the substrate for plasma doping. At least one sensor measuring data related to charging conditions favorable for forming an electrical discharge is monitored. At least one plasma process parameter is modified in response to the measured data, thereby reducing a probability of forming an electrical discharge.
摘要:
Techniques for temperature-controlled ion implantation are disclosed. In one particular exemplary embodiment, the techniques may be realized as an apparatus for temperature-controlled ion implantation. The apparatus may comprise a platen to hold a wafer in a single-wafer process chamber during ion implantation, the platen including: a wafer clamping mechanism to secure the wafer onto the platen and to provide a predetermined thermal contact between the wafer and the platen, and one or more heating elements to pre-heat and maintain the platen in a predetermined temperature range above room temperature. The apparatus may also comprise a post-cooling station to cool down the wafer after ion implantation. The apparatus may further comprise a wafer handling assembly to load the wafer onto the pre-heated platen and to remove the wafer from the platen to the post-cooling station.
摘要:
A technique for boron implantation is disclosed. In one particular exemplary embodiment, the technique may be realized by an apparatus for boron implantation. The apparatus may comprise a reaction chamber. The apparatus may also comprise a source of pentaborane coupled to the reaction chamber, wherein the source is capable of supplying a substantially pure form of pentaborane into the reaction chamber. The apparatus may further comprise a power supply that is configured to energize the pentaborane in the reaction chamber sufficiently to produce a plasma discharge having boron-bearing ions.
摘要:
Techniques for temperature-controlled ion implantation are disclosed. In one particular exemplary embodiment, the techniques may be realized as an apparatus for temperature-controlled ion implantation. The apparatus may comprise a platen to hold a wafer in a single-wafer process chamber during ion implantation, the platen including: a wafer clamping mechanism to secure the wafer onto the platen and to provide a predetermined thermal contact between the wafer and the platen, and one or more heating elements to pre-heat and maintain the platen in a predetermined temperature range above room temperature. The apparatus may also comprise a post-cooling station to cool down the wafer after ion implantation. The apparatus may further comprise a wafer handling assembly to load the wafer onto the pre-heated platen and to remove the wafer from the platen to the post-cooling station.