Historic 1970s-1980s silicon wafers - Qty of five, 4" wafers includes one DSP :
This sale is for five silicon wafers. Four of these are random picks and one is a 1980s DSP. These are all American made wafers, all printed with circuits. Each set include the 1980s Digital Signal Processor as shown at the top of each photo. The set shown is typical of what you will receive. Circuit patterns on wafers of this age are large enough to be viewed well with a 50x or better magnification. As you can see the colors of the microscopic films and circuits vary dramatically with lighting and viewing angle. These photos were made in ordinary white room lighting and are not color enhanced.
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Historic 1970s-1980s silicon wafers - Qty of five, 4" wafers includes CPU