Patent ID: 8651877

Claim:
A contact structure for microelectronics, comprising: symmetrically mated first and second metal sheets in opposing relation to each other, the first and second metal sheets respectively forming first and second arrays of outwardly extending bumps; and third and fourth metal sheets positioned over, respectively, the first and second metal sheets in a mating relation; the third metal sheet forming a third array of outwardly extending bumps, each of the bumps of the third array forming a corresponding cavity, the third metal sheet being located over the first metal sheet, in a nested relation therewith, with the bumps of the first metal sheet located in the cavities formed by the bumps of the third metal sheet; the fourth metal sheet forming a fourth array of outwardly extending bumps, each of the bumps of the fourth array forming a corresponding cavity, the fourth metal sheet being located over the second metal sheet, in a nested relation therewith, with the bumps of the fourth metal sheet located in the cavities formed by the bumps of the second metal sheet; and wherein patterns are formed in the bumps of the first, second, third and fourth metal sheets to form a contact structure having arrays of contacts and providing a leaf spring action with independent moving layers.