• Title/Summary/Keyword: STAMP

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Nano-patterning technology using an UV-NIL method (UV-NIL(Ultraviolet-Nano-Imprinting-Lithography) 방법을 이용한 나노 패터닝기술)

  • 심영석;정준호;손현기;신영재;이응숙;최성욱;김재호
    • Journal of the Korean Vacuum Society
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    • v.13 no.1
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    • pp.39-45
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    • 2004

  • Ultraviolet-nanoimprint lithography (UV-NIL) is a promising method for cost-effectively defining nanoscale structures at room temperature and low pressure. A 5${\times}$5${\times}$0.09 in. quartz stamp is fabricated using the etch process in which a Cr film was employed as a hard mask for transferring nanostructures onto the quartz plate. FAS(Fluoroalkanesilane) is used as a material for anti-adhesion surface treatment on the stamp and a thin organic film to improve adhesion on a wafer is formed by spin-coating. The low viscosity resin droplets with a nanometer scale volume are dispensed on the whole area of the coated wafer. The UV-NIL experiments have been performed using the EVG620-NIL. 370 nm - 1 m features on the stamp have been transferred to the thin resin layer on the wafer using the multi-dispensing method and UV-NIL process. We have measured the imprinted patterns and residual layer using SEM and AFM to evaluate the potential of the process.

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Contemporary Application of Roller Needle and Stamp Needle: A Patent Review (국내 특허 분석을 통한 롤러침 및 도장침의 현대적 활용)

  • Jeong, Seung-Yeon;Park, Ji-Yeun;Kim, Youn-Sub;Kim, Song-Yi
    • Korean Journal of Acupuncture
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    • v.36 no.3
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    • pp.139-149
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    • 2019

  • Objectives : A dermal needle is one of the therapeutic method by stimulating or tapping on the certain points of skin. Recently, roller or stamp-needle have been applied to various diseases in combination with microneedle technology. In this study, we analyzed the trend of roller and stamp-needle in Korean patent. Methods : Electronic search for Korean patent of roller or stamp needle was performed in Korea Intellectual Property Right Information Service database to April, 2019. Results : Sixty seven patents (51, roller-needle; 15, stamp-needle; 1, both types of needle) met the inclusion criteria. According to patent details, 34 of 67 patents were skin stimulation, 14 patents were intended to increase the efficiency of drug delivery through skin stimulation, 16 patents combined skin stimulation with technologies such as electrode or high frequency, and three patents applied both electrode or high frequency stimulation, and drug application as well as physical skin stimulation. Each of these patents aims to increase the efficiency of the needle manufacturing process (n=24), to facilitate the use of tools or to increase the efficiency of the technology (n=61), or to increase the technical skill of the needle itself (n=23). Conclusions : This study confirms that technological advances were being made by combining various types of stimuli to dermal needle and there have been attempts to expand the scope of drug delivery in terms of application of dermal needle. In the future, more research and development is needed in order to apply the dermal needle to modern technology.

  • https://doi.org/10.14406/acu.2019.017 인용 PDF KSCI

A Study on the Systematic Cause Analysis of Shipboard Fire Accident Case using STAMP Methodology

  • JeongMin Kim;HyeRi Park
    • Journal of the Korea Society of Computer and Information
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    • v.28 no.10
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    • pp.207-215
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    • 2023

  • The ship system is complex and advanced, and the operation relationship between each element is very high. So it is necessary to approach it in terms of an overall and integrated system in addition to the traditional sequential approach of finding and removing the direct cause of the accident when analyzing the accident. In this study, it is analyzed the recent fire accidents on ships occurred the Korean terrestrial water using a STAMP methodology that is different from conventional accident analysis techniques. This analysis reviews a range of factors, including safety requirements to prevent fires in ships, inappropriate decisions and actions, situations, equipment defects, and recommendations derived from accident analysis results. Through a comprehensive approach to accident prevention using STAMP, alternative evaluations are presented at the component level within the entire system of ships, and they are systematically used for accident prevention and risk evaluation as well as simple accident analysis.

  • https://doi.org/10.9708/jksci.2023.28.10.207 인용 PDF HTML