| 摘要 |
In a lead frame which has second tie bars 4a2, 4b2 in the vicinity of plastic packages 15, first notches 1 are formed along first edges of the second tie bars 4a2, 4b2 (in areas defined on both sides of the inner leads 12a, 12b and to come into contact with a punch during the tie bar cutting step). The first notches 1 prevent troubles associated with close arrangement of the second tie bars 4a2, 4b2 and the plastic packages 15. In addition, second notches 2 are provided along second edges of the second tie bars 4a2, 4b2. These second notches 2 are designed to receive the tips of outer leads 13a, 13b which extend from neighboring plastic packages 15 of the lead frames 100a, 100b.
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