Method for fabricating a magnetic material stack
First Claim
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1. A method, comprising:
- providing a substrate;
forming a first dielectric layer on the substrate;
forming a first magnetic material layer on the first dielectric layer;
forming at least a second dielectric layer on the first magnetic material layer;
forming at least a second magnetic material layer on the second dielectric layer,wherein, during one or more of the forming steps, a surface smoothing operation is performed to remove at least a portion of surface roughness on at least one of the first dielectric layer and the second dielectric layer;
wherein the first dielectric layer, the first magnetic material layer, the second dielectric layer, and the second magnetic material layer define a magnetic material stack on the substrate,forming a hard mask on the magnetic material stack;
forming a set of resist images on the hard mask; and
removing portions of the hard mask and the magnetic material stack between the set of resist images to form multiple magnetic material stack sections, adjacent magnetic material stack sections being separated by a spacing therebetween.
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Abstract
A method for fabricating a magnetic material stack on a substrate includes the following steps. A first dielectric layer is formed. A first magnetic material layer is formed on the first dielectric layer. At least a second dielectric layer is formed on the first magnetic material layer. At least a second magnetic material layer is formed on the second dielectric layer. During one or more of the forming steps, a surface smoothing operation is performed to remove at least a portion of surface roughness on the layer being formed. The magnetic material stack can be used to form a low magnetic loss yoke inductor.
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15 Claims
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1. A method, comprising:
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providing a substrate; forming a first dielectric layer on the substrate; forming a first magnetic material layer on the first dielectric layer; forming at least a second dielectric layer on the first magnetic material layer; forming at least a second magnetic material layer on the second dielectric layer, wherein, during one or more of the forming steps, a surface smoothing operation is performed to remove at least a portion of surface roughness on at least one of the first dielectric layer and the second dielectric layer; wherein the first dielectric layer, the first magnetic material layer, the second dielectric layer, and the second magnetic material layer define a magnetic material stack on the substrate, forming a hard mask on the magnetic material stack; forming a set of resist images on the hard mask; and removing portions of the hard mask and the magnetic material stack between the set of resist images to form multiple magnetic material stack sections, adjacent magnetic material stack sections being separated by a spacing therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification