Patent ID: 8912051

Claim:
A method for producing an electrical circuit, the method comprising: placing a semiconductor die in a mold tool, the semiconductor die comprising a first die surface, a second die surface generally parallel to the first die surface, and a plurality of die faces, each die face connecting an edge of the first die surface with a corresponding edge of the second die surface to define a die thickness; placing a flexible die seal upon the first die surface; and while pressing the die seal against an entirety of the first die surface of the semiconductor die, applying mold material to at least a portion of the semiconductor die; wherein the die seal comprises: a first seal surface having a generally planar first area for covering the entirety of the first die surface during said applying mold material, the first area having a plurality of edges forming a perimeter of the first area, each of the plurality of edges of the first area extending beyond a corresponding edge of the first die surface such that the first area of the first seal surface is larger than the first die surface, the first seal surface also having a generally planar second area surrounding the first area, wherein the first area and second area are not in a same plane; and a second seal surface for securing the die seal to an element of the mold tool.