Electric device

Abstract

Abstract PURPOSE:To decrease the stress because of thermal expansion and prevent the crack development of resin sealed package, by making a tab serving as the mounting part of a pellet have a form corresponding to an electrode pad arrangement part. CONSTITUTION:A lead frame 2 comprises inner leads 4, outer leads 5, a tab 80 for mounting a pellet 11. The tab 80 is composed of a pair of divided members 80a and 80b to have forms corresponding to arrangement parts of respective electrode pads 12. As the tab 80 is formed to have an extremely small size, its thermal expansion length becomes small and then, concentration of stress into the periphery of the tab can be avoided. This structure prevents the crack development of a resin sealed package 14.

Inventors

• 👤 Kazuo Shimizu
• 👤 Akiro Hoshi
• 👤 Sumio Okada

Bibliographic Details