Patent ID: 7091572
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A fast recovery diode comprising a silicon die having a substrate of a first conductivity type; a single central diffusion of a second conductivity type extending onto the upper surface of said die defining a single continuous P-N junction; a termination region surrounding the outer periphery of said diffusion and including a silicon dioxide layer which overlies the outer edge of said diffusion and which defines the diffusion window for said diffusion; an anode contact metal in contact with the surface of said diffusion and overlying the inner peripheral edge of said silicon dioxide layer such that said anode contact metal is insulated from said substrate and defines a first field plate; an EQR conductive ring which is separated from said anode contact and which extends over the outer peripheral edge of said silicon dioxide layer; platinum atoms diffused into the back surface of said die to act as life time killers; and at least one floating guard ring diffusion disposed beneath and laterally adjacent to said field plate.