MODULATION OF ROLLING K VECTORS OF ANGLED GRATINGS

Embodiments described herein relate to methods and apparatus for forming gratings having a plurality of fins with different slant angles on a substrate and forming fins with different slant angles on successive substrates using angled etch systems and/or an optical device. The methods include positioning portions of substrates retained on a platen in a path of an ion beam. The substrates have a grating material disposed thereon. The ion beam is configured to contact the grating material at an ion beam angle Q relative to a surface normal of the substrates and form gratings in the grating material. 本文中所述的实施方式涉及方法及装置，这些方法及装置用于使用成角度蚀刻系统及/或光学设备来在基板上形成具有带有不同斜角的多个鳍片的光栅及在相继的基板上形成带有不同斜角的鳍片。这些方法包括以下步骤：将固位在工作台上的基板的部分定位在离子束的路径中。这些基板具有设置在这些基板上的光栅材料。该离子束被配置为相对于这些基板的表面法线用离子束角Q接触该光栅材料及在该光栅材料中形成光栅。