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Recently, technologies related to Fine Pitch Flip Chip or FPFC have been great achievements for various next generation devices, allowing a significant increase in the number of signal I/O and achieving low form factor packages. Consequently, fine pitch Cu pillar flip chip Chip Scale Package (CSP) with small sized die, with package dimension of less than 16×16mm, is already under high volume production...
In the case of field programmable gate array (FPGA) chips, as the demand for higher speeds and enhanced functionality increases, the size of the flip chip die grows accordingly to offer higher number of logic cells. Large flip chip die also requires a large package for efficient signal routing. This paper shows a warpage improvement study including lid design and process optimization to solve warpage...
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