发明授权
US09373583B2 High quality factor filter implemented in wafer level packaging (WLP) integrated device 有权
高品质因子滤波器在晶圆级封装(WLP)集成器件中实现

High quality factor filter implemented in wafer level packaging (WLP) integrated device
摘要:
Some implementations provide an integrated device that includes a capacitor and an inductor. The inductor is electrically coupled to the capacitor. The inductor and the capacitor are configured to operate as a filter for an electrical signal in the integrated device. The inductor includes a first metal layer of a printed circuit board (PCB), a set of solder balls coupled to the PCB, and a second metal layer in a die. In some implementations, the capacitor is located in the die. In some implementations, the capacitor is a surface mounted passive device on the PCB. In some implementations, the first metal layer is a trace on the PCB. In some implementations, the inductor includes a third metal layer in the die. In some implementations, the second metal layer is an under bump metallization (UBM) layer of the die, and the third metal is a redistribution layer of the die.
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