Ultrasound technicians may expect to perform some of their work in rooms with low lighting. They can expect to be on their feet for a majority of their work time, and must be able to do some lifting or turning of patients who require assistance.
semiconductor diode A diode made of semiconductor components, usually silicon. The cathode, which is negatively charged and has an excess of electrons, is placed adjacent to the anode, which has an inherently positive charge, carrying an excess of holes. At this junction a depletion region forms, with neither holes nor electrons.
Diodes are some of the most common semiconductor devices because of their simple construction. This device is comprised of a single p-type semiconductor and a single n-type semiconductor. The drawback of a diode is that it does not allow for great amounts of energy to flow through, because of its small capacity.emiconductor devices are the many manipulations of this technology to provide a specific control over the energy. These devices are found in many forms and within many types of electronics.