| 摘要 |
PROBLEM TO BE SOLVED: To obtain a lead frame which can secure a flat width of a bonding part even by narrowing the pitch of inner leads. SOLUTION: Wider-width bonding parts 9 and narrower-width parts 10 continuous to the bonding parts 9 are formed at tip ends of inner leads 3 arranged in parallel. When a reference line L denotes a line passing through tip ends of the inner leads 3 which form parts of the bonding parts 9 and which are close to an island 5, the bonding part 9 of one of the alternately arranged inner leads 3 is positioned as spaced from the bonding part 9 of the other inner lead with respect to the reference line L.
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