Online training optional for background on plasma etching and choosing an etcher. Online training required. Open Online Course for general information about the online training. for general information about the Lagunita online training. Go to Go to Online Nano Course Login to log in directly to the course. to login directly to the course. Go to "nano@stanford" and then to the "Dry Etching" Section for the three videos on plasma etching principles and go to the "Choosing a Dry Etching Process" section for guidelines for choosing the right equipment.