Semiconductor device with integrated mirror and method of producing a semiconductor device with integrated mirror
First Claim
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1. A semiconductor device, comprising:
- a substrate of semiconductor material;
a dielectric layer above the substrate;
a waveguide arranged in the dielectric layer;
a mirror support arranged level with the waveguide, the mirror support comprising a surface that is inclined with respect to the waveguide;
the mirror support being a high-density plasma deposited oxide; and
a mirror region being arranged on the surface of the mirror support, the mirror region forming a mirror facing the waveguide and being inclined with respect to the waveguide,wherein the waveguide extends in a plane, and the surface of the mirror support is inclined with respect to the plane by an angle of inclination between 40° and
50°
,wherein the mirror region is a filling of an opening of the dielectric layer, and is located between the dielectric layer and the mirror support,wherein the filling comprises a higher index of refraction than the mirror support,wherein the mirror support is a silicon oxide, andwherein the filling is silicon.
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Abstract
The semiconductor device comprises a substrate (1) of semiconductor material, a dielectric layer (2) above the substrate, a waveguide (3) arranged in the dielectric layer, and a mirror region (4) arranged on a surface of a mirror support (5) integrated on the substrate. A mirror is thus formed facing the waveguide. The surface of the mirror support and hence the mirror are inclined with respect to the waveguide.
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Citations
13 Claims
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1. A semiconductor device, comprising:
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a substrate of semiconductor material; a dielectric layer above the substrate; a waveguide arranged in the dielectric layer; a mirror support arranged level with the waveguide, the mirror support comprising a surface that is inclined with respect to the waveguide; the mirror support being a high-density plasma deposited oxide; and a mirror region being arranged on the surface of the mirror support, the mirror region forming a mirror facing the waveguide and being inclined with respect to the waveguide, wherein the waveguide extends in a plane, and the surface of the mirror support is inclined with respect to the plane by an angle of inclination between 40° and
50°
,wherein the mirror region is a filling of an opening of the dielectric layer, and is located between the dielectric layer and the mirror support, wherein the filling comprises a higher index of refraction than the mirror support, wherein the mirror support is a silicon oxide, and wherein the filling is silicon. - View Dependent Claims (2, 3, 4, 5)
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6. A method of producing a semiconductor device, comprising:
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arranging a waveguide in a dielectric layer on a substrate of semiconductor material; forming an opening in the dielectric layer; forming a mirror support in the opening, the mirror support comprising a surface that is inclined with respect to the waveguide; and arranging a mirror region on the surface of the mirror support, thus forming a mirror, wherein the waveguide extends in a plane, and the surface of the mirror support is inclined with respect to the plane by an angle of inclination between 40° and
50°
,wherein the mirror support is formed by a high-density plasma deposition of silicon oxide, and wherein after forming the mirror support, the mirror region is formed by an epitaxial growth of silicon, thus covering the inclined surface of the mirror support and filling the opening. - View Dependent Claims (7, 8, 9)
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10. A method of producing a semiconductor device, comprising:
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arranging a waveguide in a dielectric layer on a substrate of semiconductor material; forming an opening in the dielectric layer; forming a mirror support in the opening, the mirror support comprising a surface that is inclined with respect to the waveguide; and arranging a mirror region on the surface of the mirror support, thus forming a mirror, wherein the waveguide extends in a plane, and the surface of the mirror support is inclined with respect to the plane by an angle of inclination between 40° and
50°
,wherein the mirror support is formed by a high-density plasma deposition of silicon oxide, and wherein after forming the mirror support, the mirror region is formed by a deposition of polysilicon on the surface of the mirror support, thus filling the opening. - View Dependent Claims (11, 12, 13)
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Specification