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<http://webisa.webdatacommons.org/55270923>	<http://www.w3.org/ns/prov#value>	"The step formation portion 257 consists of an insulating material such as SiO.sub.2 formed by a vacuum deposition method, a print method, a sputtering method, and the like. The thickness of the step formation portion 257 corresponds to the" .