Abstract:
An internal clock generator, system and method of generating the internal clock are disclosed. The method comprises detecting the level of an operating voltage within the system, comparing the level of the operating voltage to a target voltage level and generating a corresponding detection signal, and selecting between a normal clock and an alternate clock having a period longer than the period of the normal clock in relation to the detection signal and generating an internal clock on the basis of the selection.
Abstract:
Forming a dual damascene structure includes forming a first insulation layer and a second insulation layer, forming a resist mask, forming a via hole down to a lower end of the first insulation layer, forming a hardmask layer in the via hole and on the second insulation layer using a spin-coating method, forming a resist mask, forming a first trench hole down to a lower end of the second insulation layer, respectively removing a part of the hardmask layer in the via hole and a part of the hardmask layer on the second insulation layer, forming a second trench hole by removing a part of the first insulation layer between a top corner of the hardmask layer remaining in the via hole and a bottom corner of the first trench hole, removing the hardmask layer, and filling the via hole and the second trench hole with a conductive material.