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Evaluation of screen printed silver trace performance and long-term reliability against environmental stress on a low surface energy substrate

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)54-65
Number of pages12
JournalMicroelectronics Reliability
Volume86
DOIs
Publication statusPublished - 1 Jul 2018
Publication typeA1 Journal article-refereed

Abstract

Otherwise attractive substrate materials for printed electronics may have such surface characteristics that make patterning challenging. This article focuses on the printability and performance characterization of conductive patterns on a low surface energy substrate. Surface characteristics of a hydrophobic polyphenylene ether (PPE) substrate and the effects of surface modification using chemical and physical pre-treatments were studied. In addition, silver ink performance and its reliability on this substrate were evaluated. The surface was characterized by surface energy measurements and surface profile analysis. Screen-printed test patterns were characterized to evaluate print quality and electrical and mechanical performance. A further inspection of substrate-ink interactions was conducted using environmental reliability tests. It was observed that ink adhesion could be significantly promoted by choosing a suitable surface pre-treatment method. Low sheet resistances were obtained, and thus, suitable inks for further characterization were found. In addition, it was observed that environmental stress has a significant impact on ink-substrate interactions.