Flip-chip package structure
AssigneeSiliconware Precision Industries Co., Ltd.
InventorsTze-Wei SU, Chih-Chun YANG, Yung-Hung CHAN, Yu-Min LO, Mu-Hsuan CHAN
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Abstract
A flip-chip package structure including a semiconductor chip and a carrier having a plurality of electrical connection pads is provided, in which the semiconductor chip is connected to second solders on the electrical connection pads of the carrier via first solders. The thickness of the insulating protective layer on the surface of the carrier changes according to the thickness of the first solder, the thickness of the second solder and the thickness of the electrical connection pad, so that it has a certain thickness to avoid bridging problems in the solders, and can also avoid problems with holes in the solders caused by excessive thickness.
Claims5
A flip-chip package structure, comprising:
- a carrier including:
- a body;
- a plurality of electrical connection pads formed on one surface of the body;
- and
- an insulating protective layer formed on the surface of the body and the plurality of electrical connection pads, wherein the plurality of electrical connection pads are exposed from the insulating protective layer;
- and
- an electronic element having an active surface and an inactive surface opposite to the active surface, wherein a plurality of first solders are disposed on the active surface, and a plurality of second solders are disposed on the plurality of electrical connection pads of the carrier, so that the electronic element is connected to the plurality of second solders on the carrier via the plurality of first solders,
- wherein a thickness of the insulating protective layer of the carrier is H and meets following conditions:
- [(a+b)×0.4]+c≤H≤[(a+b)×0.6]+c, and a thickness of each of the first solders is a, a thickness of each of the second solders is b, and a thickness of each of the electrical connection pads is c.
Dependencies are inferred from the claim text.