Patent ID: 8487417
Filing Date: 2013-07-16
Classification: H01L

Abstract:
1. A package for a semiconductor die comprising: a die attach pad providing an attachment surface area for the semiconductor die; a plurality of leads: one or more tie bars integrally connected to the die attach pad, the die attach pad being disposed in a first general plane and the one or more tie bars being disposed in a second general plane, the first general plane being offset with respect to the second general plane; a molding compound that encapsulates the semiconductor die in a form having first, second, third and fourth lateral sides, a top and a bottom, one or more of the leads extending out from the first lateral side, the one or more tie bars being exposed substantially coincident with the second and third lateral sides, the form including a discontinuity that extends along at least a portion of the first lateral side and along the at least a portion of the second and third lateral sides where the one or more tie bars are exposed, the discontinuity comprising a notch disposed coincident with the bottom of the package, the notch increasing a creepage distance from the one or more tie bars to the bottom of the package; and wherein a ratio of a clearance distance to the creepage distance of the package is greater than 1:1.2, the clearance distance being measured through air from a third general plane coincident with a bottom: edge of the one or more tie bars to a fourth general plane coincident with the bottom of the package.