The 1.5 μm process (1.5 micrometer process) is the level of MOSFET semiconductor process technology that was reached around 1981–1982, by companies such as Intel and IBM.
The 1.5 μm process refers to the minimum size that could be reliably produced.
The smallest transistors and other circuit elements on a chip made with this process were around 1.5 micrometers wide.
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