SYSTEM AND METHOD FOR CONTROLLING PLASMA DEPOSITION UNIFORMITY
First Claim
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1. A process uniformity control apparatus comprising:
- a plasma chamber defined by chamber walls;
a platen disposed within said plasma chamber for supporting a target substrate;
a gas source coupled to said plasma chamber for supplying an process gas to said chamber,a power source connected to said chamber and configured to provide energy to ionize said process gas supplied to said chamber to form a plasma containing charged and non-charged species directed toward a surface of said target substrate; and
a plurality of magnetic elements disposed in spaced relation on the outside of the chamber walls, each of said plurality of magnets configured to supply a magnetic field directed at respective portions of said plasma within said chamber to control the uniformity of said plasma directed toward said target substrate.
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Abstract
A plasma process uniformity control apparatus comprises a plasma chamber defined by chamber walls and a plurality of magnetic elements disposed on the outside of the chamber walls. Each of the plurality of magnets is configured to supply a magnetic field directed at respective portions of the plasma inside the chamber to control the uniformity of the plasma directed toward the target substrate.
60 Citations
16 Claims
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1. A process uniformity control apparatus comprising:
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a plasma chamber defined by chamber walls; a platen disposed within said plasma chamber for supporting a target substrate; a gas source coupled to said plasma chamber for supplying an process gas to said chamber, a power source connected to said chamber and configured to provide energy to ionize said process gas supplied to said chamber to form a plasma containing charged and non-charged species directed toward a surface of said target substrate; and a plurality of magnetic elements disposed in spaced relation on the outside of the chamber walls, each of said plurality of magnets configured to supply a magnetic field directed at respective portions of said plasma within said chamber to control the uniformity of said plasma directed toward said target substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling plasma process uniformity comprising:
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introducing an ionizable gas into a plasma chamber, said gas containing a desired dopant; ionizing the gas using a source of power; exposing a substrate to a plasma containing positive ions of said ionized gas;
accelerating said positive ions to an implant energy toward said substrate;monitoring a uniformity of the ions during implantation into the substrate; and applying a magnetic field from at least one magnetic element located outside the plasma chamber to the generated plasma inside the chamber. - View Dependent Claims (14, 15, 16)
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Specification