Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With structure for mounting semiconductor chip to lead frame
Reexamination Certificate
2008-01-07
2011-10-04
Pert, Evan (Department: 2893)
Active solid-state devices (e.g., transistors, solid-state diode
Lead frame
With structure for mounting semiconductor chip to lead frame
C257SE21511, C257SE23042, C257S686000, C257S666000, C257S678000, C257S685000, C257S687000, C257S723000, C257SE23036, C257SE23011, C257SE23060, C257SE23066, C257SE23067, C438S107000, C438S123000
Reexamination Certificate
active
08030743
ABSTRACT:
A two tier power module has, in one form thereof, a PC board having upper and lower traces with an opening in the insulating material that contains a power device which has upward extending solder bump connections. An upper leadframe is mounted on the solder bumps and the upper tracks of the PC board. Vias in the PC board connect selected upper and lower traces. A control device is mounted atop the leadframe and wire bonded to the leadframe, and the assembly is encapsulated leaving exposed the bottom surfaces of the lower traces of the PC board as external connections. In another form the PC board is replaced by a planar leadframe and the upper leadframe has stepped sections which make connections with the planar leadframe, the bottom surfaces of the planar leadframe forming external connections of the module.
REFERENCES:
patent: 5708280 (1998-01-01), Lebby et al.
patent: 5736785 (1998-04-01), Chiang et al.
patent: 6798049 (2004-09-01), Shin et al.
patent: 7176506 (2007-02-01), Beroz et al.
Zhenxian Liang, J.D. van Wyk and Fred C. Lee, “Embedded Power: A 3-D MCM Integration Technology for IPEM Packaging Application,” IEEE Advanced Packaging, vol. 29, No. 3, pp. 504-512, 2006.
Fairchild Semiconductor Corporation Data Sheet for FDMC2380 Dual Integrated Solenoid Driver, Aug. 2007, pp. 1-15.
Liu Yong
Liu Yumin
Maldo Tiburcio A.
Rios Margie T.
Yang Hua
Fairchild Semiconductor Corporation
Hiscock & Barclay LLP
Kolahdouzan Hajar
Pert Evan
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