• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.11a
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• pp.751-752
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• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.261-262
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• 2013

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.06a
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• pp.417-418
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• 2009

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2008.06a
• /
• pp.329-330
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• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2007.06a
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• pp.25-26
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• 2007

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.471-472
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• 2011

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.453-454
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• 2011

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2018.06a
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• pp.103.1-103.1
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• 2018

기존의 연성인쇄회로기판(FPCB)은 top down방식에 의한 에칭기술이 일반화되어 있으나, 고가의 장비를 사용한 제조방식과 복잡한 공정으로 인하여 품질수준은 높은 편이나 제조단가가 매우 비싼 편이다. 기존의 값비싼 top down방식을 대체하여 저렴한 가격으로 FPCB를 대체하려는 기술들이 지속적으로 연구되고 있다. 그중에서 가장 기술개발이 활발한 분야가 인쇄(잉크젯 혹은 레이저)방식이지만 아직 인쇄노즐의 크기와 잉크의 전도도에 한계가 있어 사용에 많은 제약이 있다. 그러나 금속미세회로(MMP)기술은 도금방식에 의한 bottom up기술로 회로의 정밀도와 전도도가 높으면서 연속제조방식에 의한 대량생산이 가능하므로 저렴하게 생산할 수 있어, 기존의 FPCB제조공정을 대체할 기술로 각광받고 있다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.46 no.10
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• pp.70-78
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• 2009

This paper addresses the analysis and the design optimization of differential interconnects for high-speed Low-Voltage Differential Signaling (LVDS) applications. Thanks to the differential transmission and the low voltage swing, LVDS offers high data rates and improved noise immunity with significantly reduced power consumption in data communications, high-resolution display, and flat panel display. We present an improved model and new equations to reduce impedance mismatch and signal degradation in cascaded interconnects using optimization of interconnect design parameters such as trace width, trace height and trace space in differential printed circuit board (FPCB) transmission lines. We have carried out frequency-domain full-wave electromagnetic simulations, and time-domain transient simulations to evaluate the high-frequency characteristics of the differential FPCB interconnects. We believe that the proposed approach is very helpful to optimize high-speed differential FPCB interconnects for LVDS applications.

• Journal of Practical Engineering Education
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• v.15 no.1
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• pp.127-132
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• 2023

Authors report the performance indicator of Roll to Roll MC (hereinafter referred to as RTR) through experiment that it is possible to process 2.0G acceleration, which cannot be coped with in the existing FPCB RTR, by reducing the weight of the Dancer roll system and controlling the torque using the servo motor. Proposed dancer roll system provides uniform tension to FPCB by solving problems such as high rotation speed, heat generation, and low torque, which were impossible to achieve with the conventional magnet clutch type RTR. Through the development of a lightweight processing method for rolls using magnesium material and the development of a torque control algorithm for servo motor, torque stability also increased. Due to the enabling technology developed in this study, the reaction speed of the dancer roll was improved and the target speed was achieved as well.