The device's WLCSP (Wafer Level Chip Scale Package) is ultra compact, simplifying board design.
该器件的WLCSP(晶圆级芯片尺寸封装)是超小型，简化电路板设计。
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This paper studies a kind of new autocontrol system across-the-board, which can realize both the measurement of frequency and the separation of quartz crystal wafer.