光刻机（英语："Mask Aligner"stepper）是制造* 微机电，光电，二极体大规模集成电路的关键设备。

生产集成电路的简要步骤：

其中光刻机就是利用紫外线通过模版去除晶圆表面的保护膜的设备。

一片晶圆可以制作数十个集成电路，根据模版光刻机分为两种：

其中模版随光刻机移动的方式，模版相对光刻机中心位置不变，始终利用聚焦镜头中心部分能得到更高的精度。成为目前的主流。

A stepper is a device used in the manufacture of integrated circuits (ICs) that is similar in operation to a slide projector or a photographic enlarger. Steppers are an essential part of the complex process, called photolithography, that creates millions of microscopic circuit elements on the surface of tiny chips of silicon. These chips form the heart of ICs such as computer processors, memory chips, and many other devices.