Abstract: A semiconductor device includes a semiconductor substrate, an epitaxial layer disposed on the semiconductor substrate, a cell zone including multiple unit cells disposed in the epitaxial layer opposite to the semiconductor substrate, a transition zone having a doped region and surrounding the cell zone, a source electrode unit disposed on the epitaxial layer opposite to the semiconductor substrate, and multiple gate electrode units. Each unit cell includes a well region, a source region disposed in the well region, and a well contact region extending through the source region to contact the well region. A method for manufacturing the semiconductor device is also disclosed.

Abstract: An input device for use with a computing device includes a ball, a spring configured to encircle at least a portion of the ball, and a scroll wheel having an outer circumferential surface configured to be contacted by a digit of a user and having an inner circumferential surface having formed thereon a plurality of protrusions spaced substantially evenly from one another. The spring is configured to exert an upward force on the ball against at least one of the plurality of protrusions to provide a detent to the scroll wheel.