Patent ID: 7598621
Filing Date: 2009-10-06
Classification: H01L,H05K,Y02P

Abstract:
1. A device package to be mounted on the surface of a printed wiring board, comprising: a plurality of bottom electrodes arranged in a first row, which is an outermost row of the package, and a second row parallel and adjacent to the first row and, sizes of which bottom electrodes are different from place to place such that intervals between edges of the bottom electrodes in a section of the first row progressively increase in length from an end of the section of the first row toward a center of the first row such that an interval between a first electrode disposed at an end of the section of the first row and a second electrode in the first row, which is a next electrode closer to the center of the first row after the first electrode, is shorter than an interval between the second electrode and a third electrode, which is a next electrode after the second electrode within the first row, wherein the interval between the second electrode and third electrode is shorter than an interval between the third electrode and a fourth electrode, which is a next electrode after the third electrode within the first row, and the fourth electrode is closer to the center than is the third electrode.