Single layer leadframe design with groundplane capability

Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame

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257670, 257676, 257796, H01L 23495

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active

055436579

ABSTRACT:
An electronic package including a leadframe that includes a single layer of an electrically conducting material, a semiconductor chip support, a common ground portion surrounding the semiconductor chip support and electrically connected thereto, a plurality of signal leads electrically isolated from each other and from the common ground portion, and a plurality of ground leads electrically connected to the common ground portion. A semiconductor chip including a plurality of signal sites and a plurality of ground sites is mounted on the semiconductor chip support of the leadframe. A plurality of electrical connections are provided between selected ones of the signal sites to respective ones of the signal leads and between selected ones of the ground sites to respective ones of the ground leads. A protective enclosure is provided substantially about the semiconductor device, the semiconductor chip support, the common ground portion of the leadframe, and at least a portion of the signal leads.

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patent: 5203699 (1991-06-01), Hara et al.
patent: 5250844 (1993-10-01), Smith
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patent: 5397918 (1995-03-01), Yokochi et al.
IBM Technical Disclosure Bulletin vol. 29, No. 5, Oct. 1986, Multi-Chip Plastic Leaded Chip Carrier.
SGS-Thomson Microelectronics, Thermal Management In Surface Mounting. pp. 555-568, Jun. 1989.
Karnezos et al., EDQUAD-An Enhanced Performance Plastic Package, 1994 Proceedings 44th Electronic Components and Technology Conference, May 1, -May 4, 1994, IEEE 1994. pp. 63-66.
Mallik et al., MM Multi-Layer Molded High Performance PQFP, Multi-Layer Molded Plastic Package, pp. 2-1 to 2-9, Apr. 27, 1989.
Diagrams form a presentation by AMKOR Electronics Personnel in Fishkill May 18, 1994.

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