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Home Material Sciences High-Reliable Nanostructured Thick-Film Spinels for Multifunctional Environment Sensors

High-Reliable Nanostructured Thick-Film Spinels for Multifunctional Environment Sensors


The principally new thick films and their multilayer structures based on semiconductor mixed transition-metal oxymanganospinels and dielectric magnesium aluminates for multifunctional environment sensors with integrated temperature/humidity measuring, monitoring, control possibilities are developed.

Innovative Aspect and Main Advantages

Thick-film performance of the proposed sensing devices (see Fig. 1) has essential advantages, non-available for traditional bulk ceramics:

(1) – the layers of fine-grained semiconductors possessing p- and n-type of electrical conductivity (the possibility to fabricate multilayer diode-type thick-film structures for new-generation electronics);

(2) – the exclusive electrophysical properties and high level of functional reliability owing to direct connection of separate thick-film elements without any additional joiners (Fig. 2);

(3) – the environment-friendly thick films and their structures without any hazardous substances (like to Pb, Hg, Cd, As, etc.) in respect to the European Union Requirements (the Directive 2002/95/EC of the European Parliament and of the Council from 27.01.2003).

Areas of Application

Integrated temperature/humidity measurements, control and monitoring in household electronics (refrigerators and deep freezers, washing machines, electric cookers, air-heating and conditioning systems), automotive and industrial electronics, telecommunication networks, biomedicine, etc.

Fig. 1 View of planar-type thick-film spinels fabricated on
alumina substrate compared to disk-type bulk analogues.

Fig. 2 Topological scheme illustrating integrated humidity-temperature
sensing functionality in the developed spinel-type multilayer structures
(commutation contacts are shown by blue; dielectric layer – by orange,
p- and n-type semiconducting layers – by yellow and green, respectively).

Stage of Development

Separate elements of the above multilayer thick-film environment sensors fabricated in planar-type design were laboratory tested in SRC “Carat”. The choice of basic oxymanganospinel material is patented in Ukraine (Patent No 47534, priority – 06.04.2000).

Contact Details

Scientific Research Company "Carat", Lviv, Ukraine
Contact persons: Dr. Mykola Vakiv, Prof. Oleh Shpotyuk
Address: 202, Stryjska str., Lviv, 79031, Ukraine
Tel. +38 032 2 63-83-03;
Fax: +38 032 2 94-97-35
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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