A lead frame with parallel side members and parallel transverse members defining chip receiving areas along the frame, has a chip pad at each area. A support lead extends from each corner of the chip pad to corresponding conjunctions of side and transverse members. A U-shaped support bar extends between...http://www.google.es/patents/US4477827?utm_source=gb-gplus-sharePatente US4477827 - Lead frame for leaded semiconductor chip carriers
