Patent ID: 6507121
Filing Date: 2003-01-14
Classification: H01L,H05K,Y02P

Abstract:
A solder ball array type package structure able to control collapse, comprising at least:a substrate having at least a first surface; a plurality of pads provided on the first surface of the substrate; a carrier having at least an active surface and a back surface opposite the active surface; a molding compound encapsulating the back surface of the carrier and the dies thereon; and a plurality of solder balls each of which is made of a base material, wherein the solder balls are arranged on the active surface of the carrier in array; at least three peripheral solder balls provided in the periphery of the array, wherein each of peripheral solder balls is made of the base material with a high-melting-temperature core (HMT core) therein, wherein the carrier is arranged such that the active surface faces the first surface of the substrate to allow each solder ball correspond to one of the pads, respectively.