For [emach1ne], the DIY LED was part of a Master’s degree course and began with a slice of epitaxial wafer that goes through cleaning, annealing, and acid etching steps in preparation for ...

using a space that had been reserved for them on the wafer. The challenge is to develop fabrication steps that would not damage the rest of the chip — De Koninck and colleagues’ process ...

We will admit that it is unlikely you have enough gear in your basement to make a solar cell using these steps ... wafer becomes a solar cell. If you’ve seen ICs going through fabrication ...