Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With structure for mounting semiconductor chip to lead frame
Reexamination Certificate
2006-01-10
2006-01-10
Clark, S. V. (Department: 2823)
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
With structure for mounting semiconductor chip to lead frame
C257S666000, C228S212000
Reexamination Certificate
active
06984879
ABSTRACT:
A lead frame such as a normal or inverted lead frame includes an unsymmetrical part such as a gate. A clamp, for clamping the lead frame during wire bonding, includes an observation hole. The unsymmetrical part of the lead frame is visible through the observation hole. A lead eye box and a lead eye point are set on the unsymmetrical part through the observation hole. The picture inside the lead eye box is captured and compared to a control picture. Setting the lead eye box and the lead eye point on the unsymmetrical part through the observation hole allows detection of when the lead frame is inadvertently rotated at prescribed angles or when a normal lead frame and an inverted lead frame are inadvertently mixed.
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Kim et al., U.S. Appl. No. 09/758,325, filed Jan. 10, 2001, entitled “Pattern Recognition Method”.
Cho Hun Kil
Kim Song Hak
Amkor Technology Inc.
Clark S. V.
Gunnison McKay & Hodgson, L.L.P.
Hodgson Serge J.
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