Multilayer semiconductor device

A multilayer semiconductor device has plural semiconductor devices, each having a circuit board for a ball grid array and a semiconductor chip provided on the board. The semiconductor boards are bonded together by a reflow mounting process to use a solder ball for interlayer connection so as to form...

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Bibliographic Details
Main Authors Shibata, Akiji, Inaba, Kimio, Hosono, Masayuki
Format Patent
LanguageEnglish
Published 01.12.2009
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Summary:A multilayer semiconductor device has plural semiconductor devices, each having a circuit board for a ball grid array and a semiconductor chip provided on the board. The semiconductor boards are bonded together by a reflow mounting process to use a solder ball for interlayer connection so as to form a multilayer structure. The plural semiconductor devices each have a projection for restricting inclination of the circuit board, and the projection is provided between neighboring two of the circuit boards.