A router having a high-speed and flexible longest match retrieval device is disclosed. This, however, results in an uncontrollable re-arrangement of the wire pairs with associated interference between them. External condition data related to the service disruptions are obtained. The mobile drive unit is then capable of determining whether the difference is greater than a predetermined tolerance. An impurity concentration distribution of a second channel impurity area under second gate oxide film may be at a higher concentration than an impurity concentration distribution of a first channel impurity area under first gate oxide film. The power component has at least one conduction region, formed in the first portion of the semiconductor body, and a conduction contact, coupled to the conduction region and traversing the STI structure in a direction perpendicular to the surface of the first portion of the semiconductor body.