Hotra O. Temperature sensors based on integrated electronics and optics

Object of investigations: temperature sensors based on elements and devices of integrated electronics and optics: single-crystal semiconductor IC, liquid crystal and fiber-optic. The aim of investigations: development of the theory and practice of measuring signal in: single crystal thermosensitive IC, liquid crystals, fiber-optic elements. Methods of investigations: laser, ellipsometry methods of investigations of thermosensitive structure parameters, small angle X-ray scattering, classical methods of investigations in microelectronics technology, optics, electrooptics, methods of "Spice", methods of calculation of nonequilibrium statistics of electron gas in crystals. Theoretical and practical results, noveltry: the mechanism of negative differential conductivity in primary transducers of thermosensitive IC, that provides high coefficient of output signal stabilization at supply voltage change is revealed and explained; the necessity of introduction of auxiliary coefficient into temperature dependence of current-voltage diagram (CVD) of p-n transitions for correct description of temperature dependence of current-voltage diagram (CVD) of directly bias p-n transitions at the change of coefficient of p-n transition non-ideality is shown; the principles of creation of thermosensitive IC (with exponential, quazilinear and linear transformation for narrow temperature measuring range are proposed. The theory of kinetic properties of crystals for thermosensor creation is developed. The number of thermoresistive transducers based on thin film structures are elaborated. The influence of surface, structure parameters on the liquid crystal sensor's characteristics is investigated. The regularity of modification of liquid crystal materials for thermometry is revealed. The possibility of creation of new class of microelectronics temperature sensors based on the systems of fiber glass - liquid crystal, optical prism - liquid crystal, light guide sensor with telemetrical connector of optical supply, phase transitionsinthe range of blue phase for fixed temperature control is confirmed theoretically and experimentally. The area of usage: elaboration and usage of temperature sensors on the base of integrated electronics and optics.