2024 年 65 巻 2 号 p. 131-137
There is a strong need for prolonging the lifetime of electronic signalling equipment to reduce replacement costs. On the other hand, availability of equipment has become an issue due to the recent shortage of semiconductors. Since the actual lifetime of electronic signalling equipment depends on the lifetime of electronic components and solder joints with substrates, it is possible to prolong this lifetime by selecting suitable electronic components and improving the environment of use. In this paper, a method for quantitatively evaluating the effect of measures for prolonging lifetime was investigated utilizing a method developed to evaluate the lifetime of electronic signalling equipment.