Abstract: The description is of a flat substrate with an electrically conductive structure integrated inside the flat substrate or applied to a surface of the flat substrate and/or with a technically improved surface. The invention is characterised in that at least one sensor is integrated inside the flat substrate or applied to a surface of the flat substrate, which generates sensor signals according to deformations occurring inside the flat substrate, at least one actuator is integrated inside the flat substrate or applied to the surface of the flat substrate, which enables the flat substrate to mechanically deform when activated, and a signal unit connected to the at least one sensor and to the at least one actuator is provided, which, on the basis of the sensor signals, generates actuator signals for activating the actuator, so that deformations occurring inside the flat substrate are reduced.

Abstract: The description is of a flat substrate with an electrically conductive structure integrated inside the flat substrate or applied to a surface of the flat substrate and/or with a technically improved surface. The invention is characterised in that at least one sensor is integrated inside the flat substrate or applied to a surface of the flat substrate, which generates sensor signals according to deformations occurring inside the flat substrate, at least one actuator is integrated inside the flat substrate or applied to the surface of the flat substrate, which enables the flat substrate to mechanically deform when activated, and a signal unit connected to the at least one sensor and to the at least one actuator is provided, which, on the basis of the sensor signals, generates actuator signals for activating the actuator, so that deformations occurring inside the flat substrate are reduced.

Abstract: The invention relates to a process for producing a polyceramic composite-material body, wherein a mixture of one or more polymer materials (i), one or more fillers (ii), and a further reactive component (iii), defined below, are subjected to a first temperature treatment to produce a green body and then to a further temperature treatment, at elevated temperatures that for a mixture without component (iii) lead only to partial pyrolysis; wherein the reactive component (iii) is added, in order to react with the structure-forming components of the polymer materials used and/or the reactive gases present, and by that means extensive dimensional constancy at various durations of pyrolysis and various material thicknesses is attained at an instant at which, without the addition of component (iii), dimensional constancy is not yet attained.