Resist
In semiconductor fabrication, a resist is a thin layer used to transfer a circuit pattern to the semiconductor substrate which it is deposited upon. A resist can be patterned via lithography to form a (sub)micrometer-scale, temporary mask that protects selected areas of the underlying substrate during subsequent processing steps. The material used to prepare said thin layer is typically a viscous solution. Resists are generally proprietary mixtures of a polymer or its precursor and other small molecules (e.g. photoacid generators) that have been specially formulated for a given lithography technology. Resists used during photolithography are called photoresists.
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Famous quotes containing the word resist:
“I know as well as any one, [the devil] is an adversary, whom if we resist, he will fly from us—but I seldom resist him at all; from a terror, that though I may conquer, I may still get a hurt in the combat—so ... instead of thinking to make him fly, I generally fly myself.”
—Laurence Sterne (1713–1768)
“The same strength of character which helps a man resist love, helps to make it more violent and lasting too. People of unsettled minds are always driven about with passions, but never absolutely filled with any.”
—François, Duc De La Rochefoucauld (1613–1680)
“We should have an army so organized and so officered as to be capable in time of emergency, in cooperation with the National Militia, and under the provision of a proper national volunteer law, rapidly to expand into a force sufficient to resist all probable invasion from abroad and to furnish a respectable expeditionary force if necessary in the maintenance of our traditional American policy which bears the name of President Monroe.”
—William Howard Taft (1857–1930)