HETEROGENEOUS STACK STRUCTURES WITH OPTICAL TO ELECTRICAL TIMING REFERENCE DISTRIBUTION
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
Jun 4, 2012
filing date -
Jun 4, 2012
priority date (Note) -
Abandoned
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Abstract
A heterogeneous stack structure is provided which includes one or more optical signal-based chips and multiple electrical signal-based chips. The optical chip(s) and the electrical chip(s) are different layers of the stack structure, and the optical chip(s) includes optical signal paths extending at least partially laterally within the optical chip(s). Electrical signal paths are provided extending between and coupling the optical chip(s) and the electrical chips. The electrical signal paths include one or more through substrate vias (TSVs) through one or more electrical chips of the multiple electrical chips in the stack structure. In one embodiment, the optical chip(s) is configured laterally to locally distribute, via one or more paths of the electrical signal paths, a timing reference signal for one or more electrical chips in the stack. Conversion between optical and electrical signals within the stack structure occurs within the optical chip(s).
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