Patent ID: 6528868
Filing Date: 2003-03-04
Classification: H01L

Abstract:
A lead frame device, comprising:a lead frame formed of a first material; at least a first die pad area within which a micromechanical chip is mounted and including a first plurality of leads arranged around the at least first die pad area; at least a second die pad area within which an evaluation chip is mounted and including a second plurality of leads arranged around the at least second die pad area; a first die pad provided with respect to the micromechanical chip and formed of a second material having a thermally adapted coefficient of expansion to the micromechanical chip, the micromechanical chip being mounted in the at least first die pad area on the lead frame; and a second die pad for accommodating the evaluation chip and being mounted in the at least second die pad area on the lead frame, the second die pad being formed of a third material that is one of the same as the first material, same as the second material, and different than the first material and the second material; wherein the first material includes one of copper, a copper alloy, and a copper compound, and wherein the second material is thermally adapted to a material of the micromechanical chip, the second material including one of FeNi42% and Kovar.