Quad Flat No-lead(QFN)package of microwave chip is a relatively new packaging. It offers a small size and especially fits for high density printedcircuitassembly.
QFN封装的微波芯片采用一种较新的封装形式，这种封装体积很小，特别适合高密度印刷电路板组装。
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Being faced with the problems found in detection of printedcircuit board assembly (PCBA) at present, a new method of PCBA detection which is economical, rapid and reliable is promoted.