Patent ID: 8129834

Claim:
An apparatus comprising: a first integral metal structure comprising: a plate portion having a thickness in a Z dimension of at least one half of one millimeter; and a two-dimensional array of at least one hundred post portions, wherein the two-dimensional array extends in a plane that extends in a X dimension and a Y dimension, wherein the Z dimension is perpendicular to the plane, each of the post portions extending from the plate portion for a length, each post portion having a width that is less than one fifth of the length of the post portion, wherein an amount of fluid surrounds each post portion in a cross-sectional dimension, wherein all of the at least one hundred post portions are shorted together; and a second metal structure in electrical contact with each of the post portions of the first integral metal structure, wherein the first integral metal structure and the second metal structure are pressed together such that the post portions are disposed between the plate portion and the second metal structure, and wherein the second metal structure is a part of a semiconductor substrate.