Method for fabricating micromachined structures
First Claim
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1. A method for fabricating a micromachined structure, comprising the steps of:
- providing a substrate;
forming at least one cavity on the substrate;
filling the at least one cavity with a dielectric material different from the material of the substrate;
forming a circuitry layer above the at least one cavity filled with the dielectric material, wherein the circuitry layer comprises a first etch-resistant layer and a dielectric layer;
etching the circuitry layer so that the portion of the dielectric layer exposed by the first etch-resistant layer is removed; and
removing the dielectric material in the at least one cavity by etching.
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Abstract
A method for fabricating micromachined structures is provided. At least one cavity is formed on a substrate and then a dielectric material different from the material of the substrate is filled in the at least one cavity. Next, a circuitry layer including a first etch-resistant layer and a dielectric layer is formed above the at least one cavity filled with the dielectric material. A portion of the circuitry layer exposed by the first etch-resistant layer is then etched. Finally, the dielectric material in the at least one cavity is etched out.
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Citations
12 Claims
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1. A method for fabricating a micromachined structure, comprising the steps of:
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providing a substrate; forming at least one cavity on the substrate; filling the at least one cavity with a dielectric material different from the material of the substrate; forming a circuitry layer above the at least one cavity filled with the dielectric material, wherein the circuitry layer comprises a first etch-resistant layer and a dielectric layer; etching the circuitry layer so that the portion of the dielectric layer exposed by the first etch-resistant layer is removed; and removing the dielectric material in the at least one cavity by etching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification