High-density inter-die interconnect structure
First Claim
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1. A method for fabricating an image sensing and processing system, comprising:
- fabricating a first integrated circuit comprising a plurality of image sensing elements responsive to electromagnetic radiation incident on a first surface of the first integrated circuit;
fabricating a plurality of first conductive interconnect elements in electrical communication with one or more of the plurality of image sensing elements, wherein the plurality of first interconnect elements are disposed on a second surface of the first integrated circuit;
fabricating a second integrated circuit comprising a plurality of image processing elements;
fabricating a plurality of second conductive interconnect elements in electrical communication with one or more of the plurality of image processing elements;
wherein a pitch of two or more of the plurality of first interconnect elements is substantially equal to a pitch of two or more of the plurality of second interconnect elements; and
positioning one or more of the plurality of first interconnect elements in electrical communication with one or more of the plurality of second interconnect elements.
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Abstract
An interconnect architecture for connecting a plurality of closely-spaced electrical elements on a first integrated circuit fabricated structure with operative circuits on a second integrated circuit fabricated structure. In one embodiment, the first integrated circuit fabricated structure comprises a plurality of photo sensors. Conductive interconnect elements on the first integrated circuit fabricated structure provide electrical connection between individual photo sensors and the operative circuitry on the second integrated circuit fabricated structure.
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Citations
19 Claims
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1. A method for fabricating an image sensing and processing system, comprising:
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fabricating a first integrated circuit comprising a plurality of image sensing elements responsive to electromagnetic radiation incident on a first surface of the first integrated circuit;
fabricating a plurality of first conductive interconnect elements in electrical communication with one or more of the plurality of image sensing elements, wherein the plurality of first interconnect elements are disposed on a second surface of the first integrated circuit;
fabricating a second integrated circuit comprising a plurality of image processing elements;
fabricating a plurality of second conductive interconnect elements in electrical communication with one or more of the plurality of image processing elements;
wherein a pitch of two or more of the plurality of first interconnect elements is substantially equal to a pitch of two or more of the plurality of second interconnect elements; and
positioning one or more of the plurality of first interconnect elements in electrical communication with one or more of the plurality of second interconnect elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for sensing and processing light image signals, comprising:
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providing light signals to a first surface of a first semiconductor die;
producing electrical signals in the first semiconductor die in response to the light signals;
communicating the electrical signals to a second surface of the first semiconductor die;
forming an electrical connection between first conductive elements on the second surface of the first semiconductor die and second conductive elements on a first surface of a second semiconductor die for providing the electrical signals to the second die, wherein a pitch of the first conductive elements is substantially equal to a pitch of the second conductive elements; and
processing the electrical signals in the second die. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification