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Reliability of Passive UHF RFID Copper Tags on Plywood Substrate in High Humidity Conditions

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationThe IMAPS Nordic Annual Conference Proceedings
PublisherIMAPS Nordic
Number of pages5
ISBN (Electronic)9781510827226
Publication statusPublished - 5 Jun 2016
Publication typeA4 Article in a conference publication
EventInternational Microelectronics and Packaging Society Nordic Annual Conference -
Duration: 1 Jan 1900 → …

Publication series

NameAdditional Conferences (Device Packaging, HiTEC, HiTEN, & CICMT
ISSN (Print)2380-4491


ConferenceInternational Microelectronics and Packaging Society Nordic Annual Conference
Period1/01/00 → …


The growth of the wireless world, especially the increasing popularity of the Internet of Things, has created a need for cost-effective and environmentally friendly electronics. Great potential lies especially in versatile applications of passive UHF RFID components. However, the reliability of these components is a major issue to be addressed. This paper presents a preliminary reliability study of glue-coated and non-coated brush-painted copper tags on a plywood substrate in high humidity conditions. The passive UHF RFID components presented in this paper are fabricated using brush-painting and photonic sintering of cost-effective copper oxide ink directly on a plywood substrate. The performance of the glue-coated and non-coated tags is evaluated through wireless tag measurements before and after high humidity testing. The measurement results show that the copper tags on plywood substrate initially achieve peak read ranges of 7-8 meters and the applied coating does not affect to the read range. Moisture does not prevent the coated tags from working in a tolerable way, although the tag performance slightly temporarily decreases due to the moisture absorption. However, when the moisture exposure is long, the performance degradation comes irreversible. The absorbed moisture decreases the read range of the non-coated tags and the performance does not return back to normal after drying. Hence, the coating improves the reliability of the tags in a moist environment compared to the non-coated tags. Based on our results, the plywood material and the used manufacturing methods are very potential for low-cost, high-volume green electronics manufacturing.

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