Structural characterization of inkjet printed capacitor layers in various technological conditions

Abstract

<jats:sec> <jats:title content-type="abstract-subheading">Purpose</jats:title> <jats:p>The purpose of this paper is to analyze the individual steps during the printing of capacitor structures. The method of substrate preparation, the obtained roughness of conductive and dielectric layers are examined. Moreover, the capacitances of the obtained capacitors were examined.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Design/methodology/approach</jats:title> <jats:p>Surface roughness and microscopic analysis were used to assess the quality of printed conductive structures. Two criteria were used to assess the quality of printed dielectric structures: the necessary lack of discontinuity of layers and minimal roughness. To determine the importance of printing parameters, a draft experimental method was proposed.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Findings</jats:title> <jats:p>The optimal way to clean the substrate has been determined. The most important parameters for the dielectric layer (i.e. drop-space, table temperature, curing time and temperature) were found.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Research limitations/implications</jats:title> <jats:p>If dielectric layers are printed correctly, most problems with printing complex electronic structures (transistors, capacitors) will be eliminated.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Practical implications</jats:title> <jats:p>The tests performed identified the most important factors for dielectric layers. Using them, capacitors of repeatable capacity were printed.</jats:p> </jats:sec> <jats:sec> <jats:title content-type="abstract-subheading">Originality/value</jats:title> <jats:p>In the literature on this subject, no factors were found which were responsible for obtaining homogeneous dielectric layers.</jats:p> </jats:sec>

The ink-jet printed flexible interdigital capacitors: manufacturing and ageing tests

“…Regardless of which ink-jet printing process with any conductive material is considered as the functional phase of the ink, it consists of three basic steps: substrate preparation, printing, and sintering [31], as shown in figure 4.…”

The Impact of Technological Parameters on the Quality of Inkjet-Printed Structures

“…Zikulnig et al [15] also used the Van der Pauw method to determine the resistance of printed silver patterns on paper substrates. In the literature, some examples of publications can be found that describe different issues related to inkjet printing, such as individual drops [16,17], individual layers [18], and modelling [19,20]; the results of studies describe the influence of different factors (e.g., wettability) [21] to indicate the possibility of printing structures with fewer defects. For example, Lorwongtragool et al studied the morphology of printed lines [22].…”