Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame
Reexamination Certificate
1999-10-27
2001-06-19
Smith, Matthew (Department: 2825)
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
C257S668000, C257S669000, C257S692000, C438S106000, C438S111000, C438S123000
Reexamination Certificate
active
06249042
ABSTRACT:
TECHNICAL FIELD
The present application relates to a lead member for use in connection of circuits and the like for electronic apparatuses. The invention provides a lead member readily usable in suction-transportation processes and suitable for automatic mounting processes.
BACKGROUND ART
Because of increasing demands for smaller and lighter electronic apparatuses and the like in recent years, lead members for use in connection of circuits and the like having good space factors are being demanded. As a result, lead members of the type that have a plurality of flat conductors arranged in parallel and fixed by an insulating material at a predetermined pitch have come to be widely used.
Meanwhile, in the field of mounting devices on electronic apparatuses and the like, demands for adaptation to automation and rationalization are increasing. However, lead members of the above described type for use in interconnection of circuits and the like are thin, and hence are liable to bend and curl. Therefore, errors are liable to occur during suction-transportation of them, and there has been a problem that they are not suitable for automatic mounting.
DISCLOSURE OF THE INVENTION
The inventors made investigations into various ways to obtain lead members which, while keeping a good space factor, are easy to use in suction-transportation processes and are suitable for automatic mounting. As a result of these investigations, the inventors found that a suitable lead member having a plurality of flat conductors arranged in parallel and fixed by an insulating film at a predetermined pitch, that is readily used in suction-transportation and suitable for automatic mounting, can be obtained by providing the lead member with a flat portion for suction-transportation at a different position from the plane including both end portions of the flat conductors. Such lead members can be obtained, for example, by bending the flat conductors at predetermined positions where the flat conductors have a predetermined width such that the bent lines are kept straight.
REFERENCES:
patent: 4012835 (1977-03-01), Wallick
patent: 4862245 (1989-08-01), Pashby et al.
patent: 5198391 (1993-03-01), Rosel et al.
patent: 5408050 (1995-04-01), Kashio et al.
patent: 5594234 (1997-01-01), Carter, Jr. et al.
patent: 5716218 (1998-02-01), Farnworth et al.
patent: 6081031 (2000-06-01), Letterman, Jr. et al.
Hosokawa Takehiro
Sato Shin
Tanaka Keiichi
Lytle Craig P
Smith Matthew
Smith , Gambrell & Russell, LLP
Sumitomo Electric Industries Ltd
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