Super low profile package with stacked dies
First Claim
1. A super low profile package with stacked dies, comprising:
- a substrate having a cavity in the center and having a top surface and a bottom surface opposite to the top surface;
a heat spreader connected to the bottom surface of the substrate, wherein a portion of the heat spreader serving as a die pad is opposite to the cavity;
a first die seated in the cavity, wherein the first die is attached to the die pad and electrically connected to the substrate;
a second die seated in the cavity, wherein the second die is attached to the first die and electrically connected to the substrate;
a molding compound filling the cavity and encapsulating the first die, the second die, the heat spreader, and part of the bottom surface of the substrate; and
a plurality of solder balls attached to the bottom surface of the substrate.
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Accused Products
Abstract
A super low profile package with stacked dies comprises a substrate, a heat spreader, a first die, a second die, a molding compound, and a number of solder balls. The substrate has a cavity, a top surface and a bottom surface opposite to the top surface. The heat spreader is connected to the bottom surface of the substrate, and a portion of the heat spreader opposite to the cavity serves as a die pad. The first die seated in the cavity is attached to the die pad while the second die seated in the cavity is attached to the first die, and both dies are wire-bonded to the substrate for electrical connection. The molding compound fills the cavity and encapsulates the first die, the second die, the heat spreader, and part of the bottom surface of the substrate. Numerous solder balls are attached to the bottom surface of the substrate. The benefits resulting from the package of the invention include a reduction of profile, a simple manufacturing process, and a low prime cost.
115 Citations
10 Claims
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1. A super low profile package with stacked dies, comprising:
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a substrate having a cavity in the center and having a top surface and a bottom surface opposite to the top surface;
a heat spreader connected to the bottom surface of the substrate, wherein a portion of the heat spreader serving as a die pad is opposite to the cavity;
a first die seated in the cavity, wherein the first die is attached to the die pad and electrically connected to the substrate;
a second die seated in the cavity, wherein the second die is attached to the first die and electrically connected to the substrate;
a molding compound filling the cavity and encapsulating the first die, the second die, the heat spreader, and part of the bottom surface of the substrate; and
a plurality of solder balls attached to the bottom surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification