Abstract: The invention relates to a method for producing a microelectronic semiconductor component, especially made of silicon carbide. According to said method doped areas are produced in the semiconductor by ion implantation and radiation damage in the semiconductor is then eliminated by irradiation with electromagnetic rays. The semiconductor is exposed across substantially its entire surface to pulse-like optical radiation and heated at least in the doped area.

Abstract: A brake control system for an unwinder measures the line speed of the moving web and the rpm of the roll and produces electrical output signals proportional to each, which signals are operated upon to produce a main brake control signal to apply a braking force proportional to the roll diameter as it is constantly decreasing, and a further output signal which is proportional to the energy in the roll based on the calculation of the cube of the diameter of the roll so that required braking force modification will occur during acceleration and deceleration of the web in order to maintain essentially constant web tension. An additional feedback from a web tension measuring device is also provided which adjusts the braking force to produce an actual tension equal to the desired tension which has been included in the main braking force output signal proportional to the roll diameter.

Abstract: A process for the impregnation of active carbon with an iodine compound in which the solution is also provided with a reducing agent preferably hydrazine or a compound capable of decomposing to produce sulfur dioxide (e.g. a sulfite or hydrogen sulfite) or solubilized sulfur dioxide. The impregnated active carbon can be used for the removal of sulfur dioxide or hydrogen sulfide from a gas stream.