RESEARCH AND DEVELOPMENTS OF MICROWAVE HEATING SYSTEM FOR SOLDERING FINE CIRCUITS

提出了一种适用于精细电路焊接的倏逝波微波加热系统。倏逝波对于微波加热非常局部是有用的。加热系统由一个匹配电路和一个谐振器组成，用于增强圆波导口周围的磁场，在该圆波导中激发强倏逝波。在频率为2.3-2.35GHz、功率为200 W左右的微波条件下，对无铅钎料进行了加热实验。无铅焊料可以用微波局部加热熔化，而不会在谐振器中产生任何击穿。

The microwave heating system using evanescent wave for soldering fine circuits had been proposed. The evanescent wave is useful for the microwave heating very locally. The heating system consists of a matching circuit and a resonator for enhancing the magnetic field around the mouth of a circular waveguide in which the strong evanescent waves are excited. The experiments of heating lead-free solders have been done with the microwave at a frequency of 2.3-2.35GHz and a power of about 200W. The lead-free solder can be heated locally to be melted with microwave without any breakdown in the resonator.