Packing structure of semiconductor packages

Active solid-state devices (e.g. – transistors – solid-state diode – Lead frame – With structure for mounting semiconductor chip to lead frame

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257924, 257700, 257723, 257532, H01L 23495, H01L 2302, H01L 2334

Patent

active

058348328

ABSTRACT:
A packing structure for a surface mounting type semiconductor package, wherein at least one semiconductor chips are mounted on a die pad. A conductive pattern is formed on a printed circuit board which is located beneath an exposed side of a die pad of the package. A nonconductive thin film or a conductive layer is formed between the conductive pattern and the die pad. The conductive pattern is electrically connected to the die pad so that there is generated the package voltage difference therebetween, thereby reducing the electric noise of the package and facilitating high speed operation of the package without reducing a mounting density.

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patent: 5028986 (1991-07-01), Sugano et al.
patent: 5065224 (1991-11-01), Fraser et al.
Lineback et al., "SMD Invasion of PC Boards Gains Headway", Electronics Week, pp. 17-18, Nov. 19, 1984.

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