Patent ID: 7781878
Filing Date: 2010-08-24
Classification: H01L

Abstract:
1. A zigzag-stacked package structure comprising: a lead frame including a plurality of inner leads, a plurality of outer leads and a die paddle, wherein the die paddle is disposed between the plurality of inner leads and a height difference is formed between the die paddle and the plurality of inner leads; a zigzag-stacked structure fixedly connected on the die paddle, the zigzag-stacked structure including a plurality of first dies and a plurality of second dies, each of the plurality of first dies and the plurality of second dies having an active surface and a back surface opposite to the active surface, a first periphery region and a second periphery region opposite to the first periphery region defined upon each active surface, wherein each of the plurality of first dies and each of the plurality of second dies are alternately stacked to each other with the back surface attached to the active surface and forming a stacked area, and the plurality of first dies and the plurality of second dies are electrically connected to the plurality of inner leads, and dimensions of the stacked area formed by the plurality of first dies and the plurality of second dies of the zigzag-stacked structure alternately are upwardly increasing; an encapsulated material covering the zigzag-stacked structure and the lead frame, and the plurality of outer leads are extended outside the encapsulated material; wherein each of the plurality of first dies has a plurality of pads disposed on the first periphery region and each of the plurality of second dies has a plurality of pads disposed on the second periphery region, and each of the plurality of pads is exposed and unshadowed by any one of the plurality of first dies and the plurality of second dies placed above.