Segmented sputtering target and method/apparatus for using same
First Claim
1. A rotating sputtering target for depositing layers of different material, the rotating sputtering target comprising:
- a continuous outer periphery to be sputtered, the continuous outer periphery being circular in shape when viewed cross sectionally, the continuous outer periphery of the rotating sputtering target comprising, around its circumference, a plurality of immediately adjacent segments of different materials to be sputtered for forming respective different layers on a substrate, and wherein the segments of different materials are located at different radial locations around the circumference of the rotating sputtering target.
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Abstract
A rotating sputtering target(s) is segmented so as to include a plurality of different sputtering material portions or segments radially dispersed around the outer periphery of the target. This enables a plurality of different layers to be sputter-deposited, one after the other, using the same sputtering target as the target rotates. The thicknesses of the different layers can be controlled by the radially extensive size of the different segments, the rotation speed of the target, the material sputter rate, the sputtering power used, and/or the line speed of the sputter coater in which the target(s) is located. One or more such targets may be used in a coater according to different embodiments of this invention.
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Citations
19 Claims
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1. A rotating sputtering target for depositing layers of different material, the rotating sputtering target comprising:
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a continuous outer periphery to be sputtered, the continuous outer periphery being circular in shape when viewed cross sectionally, the continuous outer periphery of the rotating sputtering target comprising, around its circumference, a plurality of immediately adjacent segments of different materials to be sputtered for forming respective different layers on a substrate, and wherein the segments of different materials are located at different radial locations around the circumference of the rotating sputtering target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of sputtering at least part of a coating on a substrate, the method comprising:
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providing a rotatable sputtering target with an outer periphery comprising, around its circumference, a plurality of different segments of respective different materials to be sputtered for forming respective different layers on the substrate, and rotating the target and sputtering the outer periphery thereof so as to form at least first and second different layers on the substrate, wherein the first layer comprises a material from a first one of the segments and the second layer comprises a material from a second of the segments. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification