Patent ID: 6305921
Filing Date: 2001-10-23
Classification: B29C,H01L

Abstract:
An injection mold for manufacturing a semiconductor device with a lead frame having a plurality of side leads on more than one side, said mold comprising:(a) a top mold die having a central depression with more than one peripheral side edge and having alternating teeth and spaces on more than one said edge;(b) a bottom mold having a central depression with more than one peripheral side edge and having alternating teeth and spaces on more than one said edge;(c) said teeth of one of said top or bottom die being formed with inclined sidewall portions that are inclined toward one another so that said spaces between said teeth are larger at the outer ends of said teeth than at their inner ends;(d) said top and bottom dies are aligned so that the teeth of one fit into said spaces between said teeth of the other so that as they are brought together in a molding operation, the lead frame is guided into a position with each of said plurality of side leads clamped between one said tooth of one die and one said space of the other such that no open orifices remain between any teeth and spaces; and(e) whereby the larger width of the space between the outer ends of said teeth of said one die compensate for misalignment between the top and bottom dies with respect to the lead frame leads.