Method for manufacturing a semiconductor substrate
First Claim
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1. A method for manufacturing a semiconductor substrate, comprising:
- providing a donor substrate and a semiconductor handle substrate;
implanting ions into the semiconductor handle substrate and forming one or more alignment marks buried completely inside the semiconductor handle substrate by the implantation of the ions, the one or more alignment marks being configured to be detectable using electromagnetic radiation in the infrared region of the electromagnetic spectrum;
forming a plurality of doped regions buried completely inside the semiconductor handle substrate, each doped region of the plurality of doped regions comprising one or more dopants; and
attaching the donor substrate and the semiconductor handle substrate together by molecular bonding to obtain a donor-handle combination, at least one of the donor substrate and the handle substrate including a surface layer of an insulator such that the donor-handle combination forms a semiconductor-on-insulator semiconductor substrate.
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Abstract
The invention relates to a method for manufacturing a semiconductor substrate, in particular, a semiconductor-on-insulator substrate by providing a donor substrate and a handle substrate, forming a pattern of one or more doped regions typically inside the handle substrate, and then attaching such as by molecular bonding the donor substrate and the handle substrate to obtain a donor-handle compound.
89 Citations
15 Claims
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1. A method for manufacturing a semiconductor substrate, comprising:
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providing a donor substrate and a semiconductor handle substrate; implanting ions into the semiconductor handle substrate and forming one or more alignment marks buried completely inside the semiconductor handle substrate by the implantation of the ions, the one or more alignment marks being configured to be detectable using electromagnetic radiation in the infrared region of the electromagnetic spectrum; forming a plurality of doped regions buried completely inside the semiconductor handle substrate, each doped region of the plurality of doped regions comprising one or more dopants; and attaching the donor substrate and the semiconductor handle substrate together by molecular bonding to obtain a donor-handle combination, at least one of the donor substrate and the handle substrate including a surface layer of an insulator such that the donor-handle combination forms a semiconductor-on-insulator semiconductor substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for manufacturing a semiconductor substrate, comprising:
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providing a donor substrate and a handle substrate; implanting ions into the handle substrate and forming one or more alignment marks buried completely inside the handle substrate by the implantation of the ions so that the top surface of the handle substrate remains planar, the one or more alignment marks being configured to be detectable using electromagnetic radiation in the infrared region of the electromagnetic spectrum; and attaching the donor substrate and the handle substrate together to obtain a semiconductor substrate including a donor-handle combination.
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15. A semiconductor-on-insulator substrate, comprising:
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a semiconductor substrate layer having a planar top surface; and a semiconductor layer molecularly bonded to the planar top surface of the semiconductor substrate layer with a dielectric layer therebetween; one or more alignment marks buried completely inside the semiconductor substrate layer and comprising one or more implanted non-dopant species, the one or more alignment marks configured to be detectable using electromagnetic radiation in the infrared region of the electromagnetic spectrum; and a plurality of doped regions buried inside the semiconductor substrate layer, each doped region of the plurality of doped regions comprising one or more dopants.
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Specification