Patent 7948055 was granted and assigned to United Microelectronics Corporation on May, 2011 by the United States Patent and Trademark Office.
An inductor formed on a semiconductor substrate is provided in the present invention. The inductor comprises a metal layer and an insulator layer. The metal layer constitutes the coil of the inductor. The insulator layer comprises at least one insulator slot, and each insulator slot is encompassed in the metal layer.