MOS capacitor wafer

With thanks to former colleagues at MIT, I was able to get a hold of silicon wafers that with MOS capacitors (the basic structure underlying MOSFET transistors) that I can take on this trip. They originate from a course at MIT -- called 6.152 -- where students use MIT facilities for microelectronic fabrication. Here are some photographs of the wafer under the microscope:















(Interestingly, the 0.5 micron feature seems to act as a grating -- green reflections.)