Patent ID: 8525311

Claim:
A lead frame for a semiconductor device, comprising: a die pad having a first major surface for receiving an integrated circuit die; a connection bar that encircles the die pad; a first plurality of lead fingers that project from the connection bar towards the die pad, wherein the first plurality of lead fingers have proximal ends close to the die pad and distal ends connected to the connection bar, and wherein the proximal ends of the first plurality of lead fingers lie in a first plane; a second plurality of lead fingers that project from the connection bar towards the die pad, wherein the second plurality of lead fingers have proximal ends close to the die pad and distal ends connected to the connection bar, and wherein the proximal ends of the second plurality of lead fingers lie in a second plane that is parallel and spaced from the first plane; and an isolation frame that is spaced from and encircles the die pad, wherein the isolation frame lies in the space between the first and second planes and separates the proximal ends of the first plurality of lead fingers from the proximal ends of the second plurality of lead fingers, wherein the isolation frame includes a first plurality of grooves within which the proximal ends of the first plurality of lead fingers are seated.