An Erratum to this paper has been published: https://doi.org/10.1134/S0018143924100011

Разработан новый состав токопроводящих чернил для производства печатных плат с помощью струйного принтера.Чернила основаны на использовании комплексов оксалата серебра с диэтилентриамином.Показано, что разложение комплекса при температурах выше 135-145 °С приводит к образованию наночастиц металлического серебра.При спекании чернил при 200 °С на поверхности диэлектрика в течение 10-20 мин образуется токопроводящий слой с удельной проводимостью 20-30 мОм•см -1 .Содержание серебра в чернилах и, соответственно, вязкость чернил контролируются упариванием металльного растворителя в вакууме.Содержание серебра в чернилах может достигать 40 % при вязкости чернил 380 сП.Полностью упаренные чернила образуют комплекс оксалата серебра с диэтилентриамином как вязкое масло, которое не приводит к засорению сопел печатной головки при длительном хранении.Высказано предположение, что структура молекулы комплекса оксалата серебра с 1,2-ди-и полиаминами представляет собой скорее

Various styrene–methacrylate composites with mineral fillers have been studied as a substrate for the deposition of copper tracks on surfaces after laser ablation. It has been revealed that both insufficient laser heating of the substrate with applied varnish and its overheating have a negative effect on chemical copper plating. The use of crosslinked styrene–methacrylate polymers makes it possible to achieve stable copper plating of the laser-treated surface of the varnish-coated substrate. It has been shown that with an appropriate selection of ablation parameters, finely divided minerals, such as talc, celadonite, aquamarine, shungite, chromia, and iron oxide (ocher), can be used as varnish filler for chemical copper plating of laser-treated parts of the substrate.

Thermal properties of more than 20 different polyureas intended for the use as protective varnish for printed-circuit boards have been studied. Rate and completeness of the polyureas decomposition as well as their solubility in common solvents have been analyzed. It has been shown that the polyureas synthesized from branched diisocyanates, for example, isophorone diisocyanate or 1,3-bis-(isocyanatomethyl)cyclohexane, and diamines (N,N′-dialkylethylene and propylenediamine) are prone to fast and complete decomposition at relatively low temperature. For instance, the polymer formed via the reaction between piperazine and isophorone diisocyanate has been completely decomposed at 400°C within 1 min, whereas degree of decomposition of the polymer obtained from piperazine and hexamethylene diisocyanate has been as low as 31% under the same conditions. The relationship between the completeness of the polyureas decomposition and the shape of their thermogravimetric analysis curves has been stated.