Patent ID: 10043721

Abstract:
In the manufacture of a semiconductor device using a lead frame, in which an outer lead is electrically connected to an inner lead suspension lead via an inner lead, an encapsulating resin is formed over the inner lead, part of the outer lead, and part of the inner lead suspension lead. The parts of the outer lead and the inner lead suspension lead that protrude from the resin are cut, and a plated film is formed on the portion of the cut outer lead that protrudes from the resin so that a solder layer is easily formed on all exposed surfaces of the outer lead. The inner lead suspension lead includes a narrowed portion that is smaller in cross-sectional area than other portions of the inner lead suspension lead, and an outline of the resin overlaps the narrowed portion of the inner lead suspension lead in plan view so as to suppress impact forces generated when the inner lead suspension lead is cut at the narrowed portion.