The need for “perfect,” non-volatile semiconductor memory was well known very early in the life of semiconductor memory, as demonstrated by this quote from an old book on semiconductor memory published in 1973, just three years into the era of commercial semiconductor memory:
“Thus the goals that semiconductor memory must meet to serve the mass memory market are clear: high density, low cost, and access time shorter than magnetic disk.”
The race to find a more perfect, non-volatile, semiconductor memory has been run for nearly forty years and it continues today.
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