Silicon Wafer.

ID: 543 ~ Source: Courtesy of the North Adams Public Library.
This file appears in: Sprague Electric and the Space Race
Silicon Wafer.

Silicon wafers are small semiconductors usually used in electronics for the fabrication of integrated circuits. Wafers were one of Sprague Electrics' products which were most requested by the military and NASA.

This file appears in: Sprague Electric and the Space Race

By Roberto Castillo
In the Moon’s Sea of Tranquility, there is a small object, no bigger than a fifty-cent coin. It is made out of silicon and is in the shape of a disk. It may seem unimportant to the untrained eye this silicon disk contains the Apollo 11 Goodwill…