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Advanced 3D packaging of a Micro Electro Mechanical Systems (MEMS) chip and a CMOS/ASIC Chip was studied. We successfully introduced redistribution process applying two spin coated polybenzoxazole (PBO) polymer layers and two metal layers on 200 mm ASIC wafer. Both MEMS and ASIC bump pad openings were set to 60 μm in diameter. Sputtering and electrochemical plating (ECP) techniques were utilized for...
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