当前，在家用电器设计时采用减少环境负荷性的材料已成为最重要的课题之一。有些国家对于使用含铅、镉、汞、６价铬等对环境有污染的元素的材料都采取了一定的限制政策，因此使用和开发有利于环境保护的所谓环境材料日益受到重视。作为无铅化材料，当前对于无铅软钎料的开发十? Currently, the use of environmentally friendly materials in the design of home appliances has become one of the most important topics. Some countries have adopted certain restrictions on the use of materials that contain elements that pollute the environment, such as lead, cadmium, mercury, and hexavalent chromium. Therefore, the use and development of so-called environmental materials that are beneficial to the environment are increasingly valued. As lead-free materials, the current development of lead-free solder ten?