一、前言 自从真空镀膜成为一种广泛采用的工艺以来,在利用真空蒸发的所有材料中,还没有一种比铝使用得更为广泛。这是由多种因素决定的,而最主要的原因是蒸发铝具有极高的单向反射性。由于这种特性,使该工艺不仅在产品装潢中大量使用;而且还广泛用于科学技术等方面,例如用做光 I. INTRODUCTION Since vacuum coating has become a widely used process, none of the materials that utilize vacuum evaporation is more widely used than aluminum. This is determined by a variety of factors, and the primary reason is that evaporated aluminum has a very high degree of unidirectional reflectivity. Because of this feature, the process not only make extensive use of product decoration, but also widely used in science and technology, for example, as a light