Back-side-of-die, through-wafer guided-wave optical clock distribution networks, method of fabrication thereof, and uses thereof
First Claim
1. A structure for unfocused guided-wave optical clock distribution, comprising:
- an integrated circuit device;
a first cladding layer disposed on the back-side of the integrated circuit device; and
a core layer disposed on the first cladding layer, the core layer including;
at least one vertical-to-horizontal input diffraction grating configured to diffract a clock signal from the vertical plane to the horizontal plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer;
at least one horizontal-to-horizontal diffraction grating configured to diffract the clock signal through the horizontal plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer; and
at least one horizontal-to-vertical output diffraction grating configured to diffract the clock signal from the horizontal plane to the vertical plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer.
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Accused Products
Abstract
Systems and methods for back-of-die, through-wafer guided-wave optical clock distribution systems (networks) are disclosed. A representative back-of-die, through-wafer guided-wave optical clock distribution system includes an integrated circuit device with a first cladding layer disposed on the back-side of the integrated circuit device, and an core layer disposed on the first cladding layer. The core layer, the first cladding layer, or the second cladding layer can include, but is not limited to, vertical-to-horizontal input diffraction gratings, a horizontal-to-horizontal diffraction gratings, and horizontal-to-vertical output diffraction gratings.
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Citations
39 Claims
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1. A structure for unfocused guided-wave optical clock distribution, comprising:
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an integrated circuit device; a first cladding layer disposed on the back-side of the integrated circuit device; and a core layer disposed on the first cladding layer, the core layer including; at least one vertical-to-horizontal input diffraction grating configured to diffract a clock signal from the vertical plane to the horizontal plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer; at least one horizontal-to-horizontal diffraction grating configured to diffract the clock signal through the horizontal plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer; and at least one horizontal-to-vertical output diffraction grating configured to diffract the clock signal from the horizontal plane to the vertical plane in a plurality of directions, such that the clock signal is uniformly distributed through the core layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A structure for unfocused guided-wave optical clock distribution, comprising:
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an integrated circuit device; a first cladding layer disposed on the back-side of the integrated circuit device, wherein the first cladding layer includes at least one vertical-to-horizontal input diffraction grating, at least one horizontal-to-horizontal diffraction grating, and at least one horizontal-to-vertical output diffraction grating; a core layer disposed on the first cladding layer; and a vertical reflection absorption layer adjacent to the first cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the first cladding layer. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A structure for unfocused guided-wave optical clock distribution, comprising:
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an integrated circuit device; a first cladding layer disposed on the back-side of the integrated circuit device; a core layer disposed on the first cladding layer, a second cladding layer disposed on the core layer, wherein the second cladding layer includes at least one vertical-to-horizontal input diffraction grating, at least one horizontal-to-horizontal diffraction grating, and at least one horizontal-to-vertical output diffraction grating, and a vertical reflection absorption layer adjacent to the second cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the second cladding layer. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A device, comprising:
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a structure having a core layer disposed on the back-side of the structure, at least one vertical-to-horizontal input diffraction grating within the core layer, at least one horizontal-to-horizontal diffraction grating within the core layer, at least one horizontal-to-vertical diffraction output grating within the core layer, and at least one cladding layer engaging the core layer, wherein an optical clock signal is propagated in a plurality of directions, such that the clock signal is uniformly distributed vertically through the structure to the core layer, into the at least one vertical-to-horizontal input diffraction grating and is then distributed in a plurality of directions, such that the clock signal is uniformly distributed laterally through the at least one horizontal-to-horizontal diffraction grating to the at least one horizontal-to-vertical output diffraction grating, which distributes the optical clock signal in a plurality of directions, such that the clock signal is uniformly distributed vertically back through the structure substrate. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A method for fabricating a device having unfocused guided-wave optical clock distribution comprising:
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providing a substrate having a first cladding layer disposed thereon; disposing a core layer on the first cladding layer; forming vertical-to-horizontal input diffraction gratings within the core layer; forming horizontal-to-horizontal diffraction gratings within the core layer; and forming horizontal-to-vertical output diffraction gratings within the core layer, disposing a second cladding layer on the core layer; and disposing a vertical reflection absorption layer on the second cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the core layer. - View Dependent Claims (32, 33, 34, 35)
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36. A method for fabricating a device having unfocused guided-wave optical clock distribution comprising:
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providing a substrate having a first cladding layer disposed thereon; forming vertical-to-horizontal input diffraction gratings within the first cladding layer; forming horizontal-to-horizontal diffraction gratings within the first cladding layer; forming horizontal-to-vertical output diffraction gratings within the first cladding layer; disposing a core layer on the first cladding layer; disposing a second cladding layer on the core layer; and disposing a vertical reflection absorption layer on the second cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the first cladding layer.
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37. A method for fabricating a device having unfocused guided-wave optical clock distribution comprising:
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providing a substrate having a first cladding layer disposed thereon; disposing a core layer on the first cladding layer; disposing a second cladding layer on the first cladding layer; forming vertical-to-horizontal input diffraction gratings within the second cladding layer; forming horizontal-to-horizontal diffraction gratings within the second cladding layer; forming horizontal-to-vertical output diffraction gratings within the second cladding layer; disposing a second cladding layer on the core layer; and disposing a vertical reflection absorption layer on the second cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the second cladding layer.
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38. A system for fabricating a device having back-side-of-die, through-wafer optical clock distribution comprising:
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means for providing a substrate having a first cladding layer disposed thereon; means for disposing a core layer on the first cladding layer; means for forming vertical-to-horizontal input diffraction gratings within the core layer; means for forming horizontal-to-horizontal diffraction gratings within the core layer; means for forming horizontal-to-vertical output diffraction gratings within the core layer; means for disposing a second cladding layer on the core layer; and means for disposing a vertical reflection absorption layer on the second cladding layer, wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the core layer.
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39. A structure for unfocused guided-wave optical clock distribution, comprising:
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an integrated circuit device; a first cladding layer disposed on the back-side of the integrated circuit device; a core layer disposed on the first cladding layer, wherein the core layer includes at least one vertical-to-horizontal input diffraction grating, at least one horizontal-to-horizontal diffraction grating, and at least one horizontal-to-vertical output diffraction grating, wherein an optical clock signal is propagated vertically through the structure substrate to the core layer, into the at least one vertical-to-horizontal input diffraction grating and is then distributed laterally through the at least one horizontal-to-horizontal diffraction grating to the at least one horizontal-to-vertical output diffraction grating, which distributes the optical clock signal vertically back through the structure substrate; at least one chip-level optical via; and a printed wiring board substrate connected to the integrated circuit device, wherein the first cladding layer is a write-wavelength vertical reflection absorption layer, wherein the at least one optical via is a dielectric filled through-wafer via, and wherein at least one of the diffraction gratings is configured to diffract a clock signal in a plurality of directions, such that the clock signal is uniformly distributed through the core layer.
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Specification