Fan-out stacked system in package (SIP) having dummy dies and methods of making the same
First Claim
1. A package comprising:
- a first fan-out tier comprising;
one or more first device dies; and
a first molding compound extending along sidewalls of the one or more first device dies;
fan-out redistribution layers (RDLs) over the first fan-out tier; and
a second fan-out tier over the fan-out RDLs, wherein the second fan-out tier comprises;
one or more second device dies bonded to the fan-out RDLs, wherein the fan-out RDLs electrically connects the one or more first device dies to the one or more second device dies;
a dummy die bonded to the fan-out RDLs, wherein the dummy die is substantially free of any active devices, wherein the one or more first device dies has a first total surface area, wherein the one or more second device dies and the dummy die has a second total surface area, and wherein a ratio of the first total surface area to the second total surface area is about 0.8 to about 1.2; and
a second molding compound extending along sidewalls of the one or more second device dies and the dummy die.
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Accused Products
Abstract
An embodiment package includes a first fan-out tier, fan-out redistribution layers (RDLs) over the first fan-out tier, and a second fan-out tier over the fan-out RDLs. The first fan-out tier includes one or more first device dies and a first molding compound extending along sidewalls of the one or more first device dies. The second fan-out tier includes one or more second device dies bonded to fan-out RDLs, a dummy die bonded to the fan-out RDLs, and a second molding compound extending along sidewalls of the one or more second device dies and the dummy die. The fan-out RDLs electrically connects the one or more first device dies to the one or more second device dies, and the dummy die is substantially free of any active devices.
138 Citations
19 Claims
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1. A package comprising:
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a first fan-out tier comprising; one or more first device dies; and a first molding compound extending along sidewalls of the one or more first device dies; fan-out redistribution layers (RDLs) over the first fan-out tier; and a second fan-out tier over the fan-out RDLs, wherein the second fan-out tier comprises; one or more second device dies bonded to the fan-out RDLs, wherein the fan-out RDLs electrically connects the one or more first device dies to the one or more second device dies; a dummy die bonded to the fan-out RDLs, wherein the dummy die is substantially free of any active devices, wherein the one or more first device dies has a first total surface area, wherein the one or more second device dies and the dummy die has a second total surface area, and wherein a ratio of the first total surface area to the second total surface area is about 0.8 to about 1.2; and a second molding compound extending along sidewalls of the one or more second device dies and the dummy die. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A package comprising:
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a first device tier comprising; one or more first device dies; and a first molding compound encircling the one or more first device dies; a second device tier comprising; one or more second device dies; a dummy die, wherein a size and material of the dummy die is in accordance with a desired effective coefficient of thermal expansion (CTE) of the second device tier; and a second molding compound encircling the one or more second device dies and the dummy die, wherein a first total surface area of the one or more first device dies is greater than a second total surface area of the one or more second device dies, and wherein the dummy die has an effective coefficient of thermal expansion less than the second molding compound; and fan-out redistribution layers (RDLs) between the first and second device tiers, wherein the one or more first device dies and the one or more second device dies are electrically connected to the fan-out RDLs. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A package comprising:
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a first semiconductor die; a first molding compound encapsulating the first semiconductor die, wherein all semiconductor dies encapsulated by the first molding compound has a first combined surface area; a second semiconductor die; a dummy die adjacent the second semiconductor die, wherein the dummy die is substantially free of any functional circuitry; a second molding compound encapsulating the second semiconductor die and the dummy die, wherein all semiconductor dies encapsulated by the second molding compound has a second combined surface area greater than the first combined surface area and wherein a coefficient of thermal expansion of the dummy die is greater than a coefficient of thermal expansion of the second molding compound; and redistribution layers disposed between and electrically connecting the first semiconductor die and the second semiconductor die, wherein the redistribution layers further extend between the first molding compound and the second molding compound. - View Dependent Claims (16, 17, 18, 19)
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Specification