Patent ID: 7576416
Filing Date: 2009-08-18
Classification: H01L

Abstract:
1. A chip package having asymmetric molding, comprising: a lead frame, comprising: a frame body, comprising a plurality of inner lead portions and a plurality of outer lead portions wherein each of the plurality of the inner lead portions includes a die attached portion; at least a turbulent plate, bended downwards to form a concave portion followed by being bended upwards and having a first end and a second end opposite to the first end, wherein the concave portion is located at a side of the chip, the first end is connected to the frame body while the second end thereof is lower than the inner lead portions; a chip, fixed under the die attach portions of the inner lead portions, wherein the turbulent plate resides at a end of the chip; an adhesive layer, disposed between the chip and the inner lead portions; a plurality of first bonding wires, electrically connected between the chip and the corresponding inner lead portions, respectively; and a molding compound, encapsulating at least the chip, the first bonding wires, the inner lead portions, the adhesive layer and the turbulent plate, wherein the ratio between the thickness of the part of the molding compound residing over the concave portion and the thickness of the part of the molding compound residing under the concave portion is larger than 1, the thickness of the part of the molding compound residing under the outer lead portions and the thickness of the part of the molding compound residing over the outer lead portions are not equal to each other and the area of the chip takes a less than 25% ratio of the entire area of the molding compound from a top view.