From a quote on a page of IBM news:
IBM today announced it has perfected a "silicon-on-insulator" (SOI) process for building a range of more powerful microchips, such as this PowerPC chip shown with antique glass insulators once used on power transmission poles.
The "antique glass insulators" are shown below:
The insulator on the left is clearly a CD 165.1 Whitall Tatum in Straw, and the one on its side, a CD 106 Hemingray No 9 with SDP in Aqua. One can not see the detail of the insulator in the rear, but it appears to be another CD 106 Hemingray.
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Written August 3, 1998