PDIEC/TR62899-250:2016 IECTR62899-250:2016IEC2016 -5- INTRODUCTION Recently,alongwithavarietyofotherexpandingelectronictechnologyapplications,onein particular has gained a lot of attention from different angles. It is referred to as "wearable electronics". As the name of this new application implies, unlike other electronic technologies, these are to be attached or applied directly to the human body, such as traditional eyewear. Due to the particular characteristics of the human body,such as flexibility, this new technology requires a variety of new and unique capabilities, which other electronics applications do notneed. In order to realise such applications, electronic technologies are evolving in many areas.One area of special interest in electronic technology is a new process for producing devices "subtractiveprocesses", which use subtracting techniques to produce functional devices, printed electronics (PE) use an additive process using additional techniques by putting functional materials ontobasematerials. Sincethese electronic technologies are new and rapidly evolving,there are no established means for their evaluation. This Technical Report intends to resolve this situation from certain angles and give some guidance for future standardization work in wearable electronics. PDIEC/TR62899-250:2016 - 6 - IECTR62899-250:2016IEC2016 PRINTEDELECTRONICS- Part 250: Material technologies required in printed electronics for wearable smart devices Scope This part of IEC 62899, which is a Technical Report (TR), explores a new technological field to establish standardization activities in TC 119 (Printed electronics) in particular, and to contribute tothedevelopment and market expansionof wearable smart device(WsD) technology. 2 Normative references There are no normative references in this document. 3 Termsanddefinitions No terms and definitions are listed in this document. IsO and IEc maintain terminological databases for use in standardization at the following addresses: IEC Electropedia:available athttp:/www.electropedia.org/ IsOOnline browsingplatform:availableat http://www.iso.org/obp . WhatareWSDs? Wearable smart devices are a newly evolving electronic application field where standards for conventional electronic devices may not be smoothly applicable. In this new field, electronic devicesareappliedorattacheddirectlytothehumanbodylikeeyewear,contrarily to conventional electronic devices, such as TV sets, that are most likely to be used away from the body. Due to the particular characteristics of the human body, these new devices are required to have new physical characteristics, such as flexibility and salt resistance (anti- sweat). In order to address those demands,the electronics industry has come up with new processestoproducethosenewdevices. WSDs 5.1 General Figure1 shows an overview of WsDs,including categorization and examples.This graphic introduces categories based upon characteristics,such as'prior art','stretchable',‘ultra-thin' and 'biocompatibility', and some examples in each category. Technologies and challenges for PD IEC/TR62899-250:2016 IECTR62899-250:2016@IEC2016 - 7 - ,Body implantable , Low weight Implantable Biocompatibility . Self-sustain . Conformal to orga Any place • Safety to human body Any service Any network Ultra thin Textile/Fabrit Stretchable Prior art 2020 IEC Source: http:/iecetech.org/issue/2015-01/What-s-up Figure 1-WsD technologies and market 5.2 Accessorytypedevices Accessory type devices are designed to be a good fit for the shapes of the human body. The major functions of these devices are to acquire vital data and/or movement of the body, and to transfer data to other devices and/or networks without human interaction, unlike cell phones or portable music players,which require human interaction.For example,the following WSDs are already commercialized: bracelets,watches andwristbands; eyewearand headmounted devices; earphones; finger rings, necklaces and the like. In order to realize th