Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2003-06-20
2009-06-30
Patel, Ishwar I. B. (Department: 2841)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C174S260000
Reexamination Certificate
active
07554039
ABSTRACT:
In an electronic device having an interposer substrate as an MCM structure, heat dissipation properties are enhanced while the reliability of joint between the interposer substrate and a motherboard is maintained. In the invention, a metal core base material of great heat capacity and high thermal conductivity is used for both the interposer substrate and the motherboard. Furthermore, a part where a core metal is exposed is provided on at least one of the interposer substrate and the motherboard. A solder joint pad is directly formed on the core metal exposed part, and the interposer substrate is solder-joined to the motherboard.
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Asano Masahiko
Eguchi Shuji
Harada Masahide
Sato Koji
Uchiyama Kaoru
Hitachi , Ltd.
Mattingly & Malur, PC
Patel Ishwar (I. B).
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