A lead frame includes an outside frame portion having an central opening, and a rectangular mount portion supported by the outside frame portion and disposed within the central opening, and on which an electronic element is adapted to be mounted. The lead frame also includes at least one lead element...http://www.google.se/patents/US4977442?utm_source=gb-gplus-sharePatent US4977442 - Lead frame and method of producing electronic components using such improved lead frame
