Patent ID: 7855448
Filing Date: 2010-12-21
Classification: H01L,H05K

Abstract:
1. A ball grid array land pattern comprising: a plurality of conductive pads arranged in an array of rows and columns, wherein an edge of a perimeter of said array is not fully populated with conductive pads outside of a corner pad arrangement, whereby spaces created in said edge by absence of respective conductive pads create additional routing channels to increase a total number of routing channels for signals from conductive pads within said array to be routed external to said array through said edge, wherein said edge includes an outermost row including a first pattern having a first pad, a space, and a second pad arranged in series that repeats at least once, wherein each repeat of the first pattern in said outermost row is immediately adjacent to a prior instance of the first pattern in said outermost row without an intervening space between said each repeat, and wherein a second row of said array immediately adjacent and parallel to said outermost row includes a second pattern having a third pad immediately adjacent to said first pad, a fourth pad immediately adjacent to said space, and a fifth pad immediately adjacent to said second pad, said second pattern repeating with said first pattern.