Patent ID: 7514768
Filing Date: 2009-04-07
Classification: H01L,H05K

Abstract:
1. A semiconductor device, comprising: a substrate having a main surface and a back surface, the substrate having a recess on the back surface; a semiconductor chip formed in the recess on the back surface of the substrate; a first bump unit disposed on a back surface of the semiconductor chip to radiate heat from the semiconductor device, the first bump unit including a plurality of bumps disposed a first distance apart from each other; and a second bump unit formed on the back surface of the substrate for transmitting signals, the second bump unit including a plurality of bumps disposed a second distance apart from each other, the second distance being greater than the first distance, wherein the first and second distances are set such that upon application of a heat treatment to the device for the purpose of mounting the device to a circuit board, the bumps of the first bump unit melt so as to become connected and fuse to each other as a unitary body and the bumps of the second bump unit melt and remain apart from each other.