Abstract: A process for the purification of an aqueous hydrogen peroxide solution includes the following steps: (a) the treatment of an aqueous hydrogen peroxide solution with at least one first reverse osmosis system, (b) the treatment of the obtained hydrogen peroxide solution with at least one first stabilizer, (c) the treatment of the obtained hydrogen peroxide solution with at least one purification mean selected from adsorption resins, ion exchange resins, and combinations thereof. An aqueous hydrogen peroxide solution obtainable thereby is described. The use of the aqueous hydrogen peroxide solution in the manufacture of microelectronic components and semiconductors is also described.

Abstract: A method and a system for synchronising angles of at least two displaceable working means (2, 2?) at a predetermined point of action (4) is disclosed. The working means are, in particular, a robot-controlled tool or a robot-controlled radiation emitter and/or radiation receiver. In order to synchronise angles in a precise manner, the directions of the action (1, 1?) of the working means (2, 2?) are, in particular represented in a continuous manner, detected and united at a predetermined point of action (4). The angle (a) between the directions of the action (1, 1?) of the working means (2, 2?) is determined by, in particular, an optical angle measurement and is adjusted to a predetermined value.

Abstract: Process for the purification of aqueous peroxygen solutions comprising the treatment of an aqueous peroxygen solution with (a) at least one membrane purification step, (b) optionally at least one ion exchange purification step, (c) optionally at least one dilution step, and (d) at least one other purification step, all of which can be conducted in any sequence. Aqueous peroxygen solutions having a TOC level of less than 1 mg/kg can be obtained by this process. They can be used in the manufacture of semiconductors.

Abstract: A method and a system for synchronising angles of at least two displaceable working means (2, 2?) at a predetermined point of action (4) is disclosed. The working means are, in particular, a robot-controlled tool or a robot-controlled radiation emitter and/or radiation receiver. In order to synchronise angles in a precise manner, the directions of the action (1, 1?) of the working means (2, 2?) are, in particular represented in a continuous manner, detected and united at a predetermined point of action (4). The angle (?) between the directions of the action (1, 1?) of the working means (2, 2?) is determined by, in particular, an optical angle measurement and is adjusted to a predetermined value.

Abstract: Plaster for adhesive bonding to the skin, in particular for the covering of relatively small wounds, consisting of a support material which is provided on its bottom side with a dermatologically compatible self-adhesive layer, characterized in that all or part of the top side of the support material bears a long-afterglow imprint consisting of a coating system into which a long-afterglow pigment has been incorporated.