Patent ID: 7361997

Claim:
A device package to be mounted on the surface of a printed wiring board, comprising: bottom electrodes in a first row, which is an outermost row, and a second row parallel and adjacent to the first row, arranged such that intervals between edges of 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, the fourth electrode is closer to the center than is the third electrode, and the interval between the first and second electrodes is unobstructed by any other electrode, the interval between the second and third electrodes is unobstructed by any other electrode, and the interval between the third and fourth electrodes is unobstructed by any other electrode, a first second-row electrode is located in the second row and aligned with the first electrode in a direction perpendicular to the first row, and an interval between the first second-row electrode and a second second-row electrode, which is a next electrode closer to the center of the second row after the first second-row electrode, is shorter than the interval between the first electrode and the second electrode; further comprising a third row parallel to the first row and including a first third-row electrode aligned with the first electrode in a direction perpendicular to the first row, and a second third-row electrode, which is a next electrode closer to a center of the third-row after the first third-row electrode, positioned such that an interval between the first third-row electrode and the second third-row electrode is shorter than the interval between the first electrode and the second electrode, wherein the interval between the first third-row electrode and second third-row electrode is shorter than the interval between the first second-row electrode and the second second-row electrode.