Maskless Wafer Stepper Part 2: Mechanics

Video Description

This video is the 2nd of 3 video's on the design and build process of a small maskless wafer stepper. It discusses the mechanical aspects of the machine, in particular the challenges that I face to achieve the requirements. 0:00 General intro 1:18 First devices (Fresnel zone plates) 3:28 Mechanical system (wafer stage / focusser) 7:49 Position and lead screw linearity 10:09 Determining straightness and perpendicularity (squareness) 11:45 Z-axis positioning using a piezo actuator I also show some crude footage of the first optically active devices. Sorry about the image quality, I will get back with more detailed images in future videos. The idea is to make micro optics with this machine. More theory on the fresnel lens / zone plate can be found on : http://zoneplate.lbl.gov/theory Choreography at 6:03 minutes by Fermat CNC machining: https://www.youtube.com/watch?v=5FmaAkXqVTI The end of this video contains a short clip from the rock-mockumentary "Spinal Tap" at 13:41. If you want to know why it is important to have controllers going all the way up to 11 in your equipment, please see the original video clip: https://www.youtube.com/watch?v=4xgx4k83zzc