Abstract:
An ion implantation tool includes a process chamber, a platen, an ion source, and a plurality of controlling units. The platen is present in the process chamber and configured to hold a wafer. The ion source is configured to provide an ion beam onto the wafer. The controlling units are present on the platen and configured to apply a plurality of physical fields that are able to affect motions of ions of the ion beam onto the wafer.
Abstract:
Apparatus and methods for the selective implanting of the outer portion of a workpiece are disclosed. A mask is disposed between the ion beam and the workpiece, having an aperture through which the ion beam passes. The aperture may have a concave first edge, forming using a radius equal to the inner radius of the outer portion of the workpiece. Further, the mask is affixed to a roplat such that the platen is free to rotate between a load/unload position and an operational position without moving the mask. In certain embodiments, the mask is affixed to the base of the roplat and has a first portion with an aperture that extends vertically upward from the base, and a second portion that is shaped so as not to interfere with the rotation of the platen. In other embodiments, the mask may be affixed to the arms of the roplat.
Abstract:
A method for monitoring ion implantation, comprising: a), providing a control piece and forming a mask layer; b), performing ion implantation process to implant a predetermined dose of impurity ions into the control piece, an area on the control piece uncovered by the mask layer being an impurity implantation area and an area on the control piece covered by the mask layer being an impurity non-implantation area; c), peeling off the mask layer from the control piece; d), performing oxidation treatment on the control piece; and e), respectively measuring thicknesses of the oxide layers on the impurity implantation area and the impurity non-implantation area of the control piece, and monitoring the impurity dose of the ion implantation on the basis of a ratio of the thickness of the oxide layer in the impurity implantation area to the thickness of the oxide layer in the impurity non-implantation area. By this method, it is possible to accurately monitor whether or not the dose of the implanted ions meets the predetermined requirement, and it is possible to effectively avoid the defects of incorrect monitor result caused by the variation of the intrinsic resistance of the semiconductor, improve the accuracy of the monitoring, and thus improve the performance and yield rate of the device.
Abstract:
An ion irradiation apparatus is provided. The ion irradiation apparatus includes a support member, a measuring device, and a control device. The support member is larger than the substrate. The measuring device is disposed forwardly in a traveling direction of an ion beam. The ion irradiation apparatus operates in a first mode during which the measuring device is irradiated with a remaining part of the ion beam after being partially shielded by the support member, when the substrate is not irradiated with the ion beam after crossing the ion beam; and a second mode during which the measuring device is irradiated with the ion beam without being shielded by the support member, when the substrate is not irradiated with the ion beam after crossing the ion beam. The control device controls the substrate so that the ion treatment process is performed in the first mode at least one time during the treatment.
Abstract:
An ion irradiation apparatus is provided. The ion irradiation apparatus includes a support member, a measuring device, and a control device. The support member is larger than the substrate. The measuring device is disposed forwardly in a traveling direction of an ion beam. The ion irradiation apparatus operates in a first mode during which the measuring device is irradiated with a remaining part of the ion beam after being partially shielded by the support member, when the substrate is not irradiated with the ion beam after crossing the ion beam; and a second mode during which the measuring device is irradiated with the ion beam without being shielded by the support member, when the substrate is not irradiated with the ion beam after crossing the ion beam. The control device controls the substrate so that the ion treatment process is performed in the first mode at least one time during the treatment.
Abstract:
A method for checking an ion implantation condition when ions are implanted over an entirety of one surface of a semiconductor wafer having an insulator film on the one surface, the method including checking whether the ions are implanted over the entirety of the one surface of the semiconductor wafer by directly or indirectly observing light emitted when the one surface of the semiconductor wafer is irradiated with an ion beam of the implanted ions throughout the ion implantation.
Abstract:
The present invention relates to a dose-measurement device for ion implantation, the device comprising a module CUR for estimating implantation current, a secondary electron detector DSE, and a control circuit CC for estimating the ion current by taking the difference between said implantation current and the current from said secondary electron detector. Furthermore, said high-energy secondary electron detector comprises a collector COL, P supporting exactly three mutually insulated electrodes: a first repulsion electrode G1, A1, T1 for repelling charges of a predetermined sign that are to be repelled, said electrode being provided with at least one orifice for passing electrons; a second repulsion electrode G2, A2, T2 for repelling charges of the opposite sign that are to be repelled, said electrode also being provided with at least one orifice for passing electrons; and a selection electrode G3, A3, T3, this electrode also being provided with at least one orifice for passing electrons.
Abstract:
An ion implanting apparatus is provided, which can accurately measure a quantity of atoms that are implanted. The ion implanting apparatus according to the present invention has an object to be measured, and the object to be measured is arranged in an irradiating range in which ions are irradiated. When atoms are implanted into an object to be processed by irradiating ions of a processing gas and neutralized particles thereof, the object to be measured is heated through the irradiation with the processing gas ions and the neutralized particles. A control unit determines a quantity of the atoms that are implanted into the object to be processed from the temperature of the object to be measured.
Abstract:
During ion implantation into a wafer, an ion beam current is measured, a change in vacuum conductance which changes in accordance with a change of the location of a structure operating in a vacuum beam line chamber or a vacuum treatment chamber is obtained, furthermore, changes in degree of vacuum at one or plural places are detected using a vacuum gauge installed in the vacuum beam line chamber or the vacuum treatment chamber. The amount of an ion beam current is corrected using the obtained vacuum conductance and the detected degree of vacuum at one or plural places, and the dose amount implanted into the wafer is controlled.
Abstract:
An apparatus for monitoring an ion distribution of a wafer comprises a first sensor and a sensor. The first sensor, the second senor and the wafer are placed in an effective range of a uniform ion implantation current profile. A controller determines the ion dose of each region of the wafer based upon the detected signal from the first sensor and the second senor. In addition, the controller adjusts the scanning frequency of an ion beam or the movement speed of the wafer to achieve a uniform ion distribution on the wafer.