High temperature superconductor deposition by sputtering
First Claim
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1. A method of employing a direct-current magnetron sputtering device to sputter a first material which has low heat and electrical conductivity at the temperatures encountered in the sputtering operation from a target to a substrate, the method comprising the steps of:
- employing a second material with high heat and electrical conductivity for the target;
applying a coating of the first material to a surface of the target which is subject to ion bombardment in the sputtering device, the coating being applied by spraying a powder of the first material onto the surface and having the property that particles of the first material are tightly bound to each other and/or to the surface; and
operating the sputtering device using the target.
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Abstract
A target which is a good conductor of heat and electricity is plasma sprayed with a weakly conducting material such as a metallic oxide. The target is then employed in a magnetron sputtering apparatus to sputter the material sprayed onto the target onto a substrate. The technique permits use of power densities and target sizes and shapes which are advantageous for sputtering substrates having large surface areas.
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Citations
10 Claims
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1. A method of employing a direct-current magnetron sputtering device to sputter a first material which has low heat and electrical conductivity at the temperatures encountered in the sputtering operation from a target to a substrate, the method comprising the steps of:
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employing a second material with high heat and electrical conductivity for the target; applying a coating of the first material to a surface of the target which is subject to ion bombardment in the sputtering device, the coating being applied by spraying a powder of the first material onto the surface and having the property that particles of the first material are tightly bound to each other and/or to the surface; and operating the sputtering device using the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification