| http://www.w3.org/ns/prov#value | - Particularly, an apparatus of the type which uses a band-narrowed laser whose oscillation wavelength width is narrowed, and which reduction-exposes the pattern of a negative such as a reticle or a mask onto a photosensitive substrate such as a wafer by a projection lens using only quartz as an optical material is expected to be put into practical use soon.
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