手持电子产品的薄型化催生了IC封装无芯基板，它不仅比IC封装有芯基板更薄，而且电气性能更加优越。介绍了IC封装无芯基板的发展趋势和......

The vehicle semi-active suspension with magneto-rheological damper(MRD) has been a hot topic since this decade, in which......