Semiconductor device having a bump which is inspected from outside and a circuit board used with such a semiconductor device

A BGA-type semiconductor device has a soldering bump a soldered state of which can be easily checked by visual inspection. A package has a bottom surface which faces the wiring board when the semiconductor device is mounted on the wiring board. A plurality of soldering bumps are provided on the bott...

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Bibliographische Detailangaben
Hauptverfasser:	SEKIYA, YUKIO, KUMAI, TOSHIO, TESHIMA, YASUHIRO, NIISHIRO, MAMORU, KOBAYASHI, YASUSHI, ICHIHARA, IGARASHI, SHUZO, HIGASHIGUCHI, YUTAKA
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PRINTED CIRCUITS SEMICONDUCTOR DEVICES TESTING
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Beschreibung
Zusammenfassung:	A BGA-type semiconductor device has a soldering bump a soldered state of which can be easily checked by visual inspection. A package has a bottom surface which faces the wiring board when the semiconductor device is mounted on the wiring board. A plurality of soldering bumps are provided on the bottom surface of the package. The soldering bumps are in a plurality of different sizes, and are located in positions where the soldering bumps are observable from outside of the package when the semiconductor device is mounted on the wiring board.