Patent ID: 6020625
Filing Date: 2000-02-01
Classification: H01L

Abstract:
A semiconductor device comprising:a unitary lead frame including:a die pad having plural corners;plural inner leads arranged at intervals along a circumferential edge of the die pad and having respective inner end portions;plural outer leads respectively extending from an outer side of corresponding inner leads;a hanging lead reinforcement in a frame shape and located between the die pad and the inner leads along the circumferential edge of the die pad;first hanging leads connecting the corners of the die pad with the hanging lead reinforcement; andsecond hanging leads connecting the hanging lead reinforcement with a dam bar located between the inner leads and outer leads;a semiconductor chip die bonded to the lead frame; andmetal wires electrically connecting the semiconductor chip with the plural inner leads, whereinthe lead frame, semiconductor chip, and metal wires are encapsulated in a molded resin, and an end portion of the outer leads of the lead frame, the dam bar, and end portions of the second hanging leads at an outer portion, proximate a surface of a mold, are cut, anda length of one side of the semiconductor chip is 2.5 mm smaller than a side of a mold external dimension, one side of the largest dimension of the hanging lead reinforcement does not exceed the length of one side of the semiconductor chip, one side of the die pad exceeds 3 mm in length and is not more than 50% of the length of one side of the largest dimension of the hanging lead reinforcement, the die pad is sunk proximate a location where the second hanging lead connecting the hanging lead reinforcement with the dam bar is connected with the hanging lead reinforcement, and a step is included in the second hanging lead.