These are the Hitachi Standard Micro Scale spacers/precision dies/mandrels/? that were/are used in the manufacture of the large “Wafers” that computer CPUs and other microchips are grown on.
We touched on them briefly during today’s show, and wanted to present them to you here in a picture for clarity.
In the opened containers there are the cases with the word “TOP” in English and Chinese on them. Unscrew the cases, (seen in the lower left), and you get an inner precision spacer. In the tiny bag, a set screw for fixing it into place.
