Semiconductor device and manufacturing method of the same
First Claim
1. A manufacturing method of a semiconductor device having an N-type semiconductor layer on a P-type semiconductor layer, the manufacturing method comprising:
- a dry etching process of performing dry etching to go through the N-type semiconductor layer in a thickness direction in order to expose a surface of the P-type semiconductor layer; and
an annealing process of annealing the P-type semiconductor layer in an atmosphere comprising oxygen, after the dry etching process,wherein a width of the P-type semiconductor layer exposed by the dry etching process is not less than 1% of a half pitch of the semiconductor device.
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Abstract
There is provided a manufacturing method of a semiconductor device having an N-type semiconductor layer on a P-type semiconductor layer. The manufacturing method comprises: a dry etching process of performing dry etching to go through the N-type semiconductor layer in a thickness direction and make the plane in the thickness direction of the P-type semiconductor layer exposed; and a annealing process of annealing the P-type semiconductor layer in an atmosphere containing oxygen, after the dry etching process. This manufacturing method improves the electrical properties of the P-type semiconductor layer.
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Citations
14 Claims
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1. A manufacturing method of a semiconductor device having an N-type semiconductor layer on a P-type semiconductor layer, the manufacturing method comprising:
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a dry etching process of performing dry etching to go through the N-type semiconductor layer in a thickness direction in order to expose a surface of the P-type semiconductor layer; and an annealing process of annealing the P-type semiconductor layer in an atmosphere comprising oxygen, after the dry etching process, wherein a width of the P-type semiconductor layer exposed by the dry etching process is not less than 1% of a half pitch of the semiconductor device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of manufacturing a semiconductor device, comprising:
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forming a first N-type semiconductor layer on substrate; forming a P-type semiconductor layer on the first N-type semiconductor layer; forming a second N-type semiconductor layer on the P-type semiconductor layer; performing a dry etching of the second N-type semiconductor layer to form a plurality of recesses in the N-type semiconductor layer, the surface of the P-type semiconductor layer being exposed through a first recess of the plurality of recesses; and after the performing of the drying etching, annealing the P-type semiconductor layer in an atmosphere comprising oxygen, wherein a width of the surface of the P-type semiconductor layer exposed by the dry etching is not less than 1% of a half pitch of the semiconductor device, the half pitch comprising a distance between a center axis of a first recess and a center axis of a second recess of the plurality of recesses.
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Specification