Invention Application
US20130214401A1 System and Method for Fine Pitch PoP Structure 有权
PoP结构体系及方法

System and Method for Fine Pitch PoP Structure
Abstract:
A fine pitch package-on-package (PoP), and a method of forming, are provided. The PoP may be formed by placing connections, e.g., solder balls, on a first substrate having a semiconductor die attached thereto. A first reflow process is performed to elongate the solder balls. Thereafter, a second substrate having another semiconductor die attached thereto is connected to the solder balls. A second reflow process is performed to form an hourglass connection.
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