| CPC H01L 21/561 (2013.01) [G02B 6/1225 (2013.01); G02B 6/136 (2013.01); G02B 6/30 (2013.01); H01L 23/3121 (2013.01); H01L 23/3171 (2013.01); H01L 23/5226 (2013.01); H01L 23/5283 (2013.01); H01L 23/5383 (2013.01); H01L 23/5386 (2013.01); H01L 24/09 (2013.01); H01L 24/17 (2013.01); H01L 24/32 (2013.01); H01L 24/73 (2013.01); H01L 2224/0231 (2013.01); H01L 2224/02373 (2013.01); H01L 2924/1433 (2013.01)] | 20 Claims |

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1. A structure comprising:
an encapsulant;
a photonic die in the encapsulant;
a through-via in the encapsulant;
an electronic die over and bonding to the photonic die and the through-via;
redistribution lines underlying the encapsulant, wherein the redistribution lines are electrically connected to the electronic die, and wherein the redistribution lines are electrically coupled to the photonic die through the electronic die and the through-via;
an optical coupler attached to the photonic die; and
an optical fiber attached to the optical coupler.
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