An interface assembly includes an interface, such as a mask, that is secured to a head using a headgear assembly. The tool includes a rod-shaped body having a substantially semispherical front end portion and numerous abrasive grains bonded to an outer circumferential surface of the rod-shaped body at the front end portion and at a portion having a given length from the front end portion by a bond member formed primarily of copper alloy. The measuring circuit notifies a power management microcomputer, provided in a portable device, of the measured current, voltage and temperature. The system determines a size of the first area by computing a number of data items that are to be displayed in the first area and generates the user interface to include the first area in the second area, the first area being of the determined size. The present invention provides a method for producing a CMOS transistor having enhanced performance since a short channel characteristic and operation power can be controlled by the duplicate punch stop layer of the pMOS region and the operation power of the nMOS is also controlled by dopant concentration of the duplicated LDD region combined by the first LDD region and the second LDD region.