• 한국정보통신학회논문지
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• 제20권2호
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• pp.317-326
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• 2016

본 논문에서는 OTP (One-Time Programmable) IP (Intellectual Property)의 개발비용을 절감하고 개발 기간을 단축하기 위해 로직 트랜지스터만 이용한 로직 eFuse (electrical Fuse) OTP IP를 설계하였다. 웨이퍼 테스트 시 테스트 장비에서 FSOURCE 패드를 통해 VDD (=1.5V)보다 높은 2.4V의 외부 프로그램 전압을 eFuse OTP IP에만 공급하므로 eFuse OTP 이외의 다른 IP에는 소자의 신뢰성에 영향을 미치지 않으면서 eFuse OTP cell의 eFuse 링크에 높은 전압을 인가하도록 하였다. 한편 본 논문에서는 128행 ${\times}$ 8열의 2D (Dimensional) 메모리 어레이에 직접 FSOURCE 전압을 인가하여 eFuse에 인가되는 프로그램 파워를 증가시키면서 디코딩 로직 회로를 저면적으로 구현한 eFuse OTP 셀을 제안하였다. 동부하이텍 $0.11{\mu}m$ CIS 공정을 이용하여 설계된 1Kb eFuse OTP 메모리 IP의 레이아웃 면적은 $295.595{\mu}m{\times}455.873{\mu}m$ ($=0.134mm^2$)이다.

• 전기학회논문지
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• 제67권5호
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• pp.644-650
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• 2018

According to a miniaturization and integration of electric device, a little size of fuse satisfying the current carrying capacity as well as an explosive tolerance and current interrupt rating are required. Fe-Ni alloy is applied to decrease an oxidation of fuse elements. A resistance and T.C.R(temperature coefficient of resistance) of a fuse are analyzed by changing a content of Ni And full rated current I-T curve from 1A to 6.3A has been tested. In order to an explosive energy, a straight wire type is selected to reduce a fuse melting time. An interrupt rating test was conducted by changing a content of Ni and the optimal content of Ni is to be 40%.

• 한국정보전자통신기술학회논문지
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• 제8권2호
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• pp.107-115
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• 2015

본 논문에서는 Power IC용 저면적 32비트 differential paired eFuse OTP 메모리를 설계하였다. OTP 메모리 셀 어레이에서 행의 개수가 열의 개수보다 더 작은 경우 eFuse 링크의 프로그램 전류를 공급하는 SL (Source Line) 구동 라인을 열 방향으로 라우팅하는 대신 행 방향으로 라우팅하므로 레이아웃 면적을 많이 차지하는 SL 구동회로의 수를 줄이는 differential paired eFuse 셀 어레이 방식과 코어 회로를 제안하였다. 그리고 blowing되지 않은 eFuse 링크가 EM (Electro-Migration) 현상에 의해 blowing되는 불량을 해결하기 위해 RWL (Read Word-Line) 구동 회로와 BL (Bit-Line) 풀-업 부하회로에 V2V ($=2V{\pm}0.2V$)의 regulation된 전압을 사용하였다. 설계된 32비트 eFuse OTP 메모리의 레이아웃 면적은 $228.525{\mu}m{\times}105.435{\mu}m$으로 기존의 셀 어레이 라우팅을 이용한 IP 크기인 $197.485{\mu}m{\times}153.715{\mu}m$ 보다 20.7% 더 작은 것을 확인하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.722-725
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• 2012

본 논문에서는 프로그램 된 eFuse 링크의 센싱 저항이 작으면서 기준 전압없이 BL 데이터를 센싱가능한 differential paired eFuse 셀을 사용하여 BCD 공정 기반의 8비트 eFuse OTP를 설계하였다. Differential eFuse OTP 셀의 프로그램 트랜지스터의 채널 폭은 $45{\mu}m$과 $120{\mu}m$으로 split하였다. 그리고 프로그램된 eFuse 저항의 변동을 고려한 variable pull-up load를 갖는 센싱 마진 테스터(sensing margin test) 회로를 구현하였다. $0.35{\mu}m$ BCD 공정을 이용하여 제작된 8bit eFuse OTP IP를 측정한 결과 프로그램 트랜지스터의 채널 폭이 $120{\mu}m$인 OTP IP의 수율이 $45{\mu}m$인 OTP IP보다 양호한 것으로 나타났다.

• 전자공학회논문지
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• 제54권3호
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• pp.131-137
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• 2017

네트워크 기반의 휴대용 전자 제품의 시장 성장으로 전기기기들은 더욱 소형화 되고 있는 추세이고 내부 부품간의 거리가 가까워져 회로 단락의 위험이 높아지고 있다. 회로의 단락 상황에서 유입되는 높은 과전류로 부터 폭발이나 화재 없이 전자기기를 안전하게 보호하기 위해서는 차단용량이 높은 밀폐형 카트리지 퓨즈를 적용해야 하지만 제품의 소형화 추세에 따른 공간의 문제로 해당 퓨즈의 적용이 불가능한 실정이다. 이를 해결하기 위해서 화학적 결합으로 퓨즈 가용체를 보호하는 밀폐형 퓨즈보다 공기의 유입이 자유로울 뿐만 아니라 물리적 결합으로 퓨즈링크를 보호하는 반밀폐형 초소형 퓨즈가 적용되는 것이 적합하지만 높은 차단용량 특성을 구현하는데 한계가 있다. 이에 본 논문에서는 상대적으로 공간을 적게 차지하면서 높은 차단용량을 갖는 반밀폐형 초소형 퓨즈를 위한 퓨즈 가용체 합금과 퓨즈링크의 설계 기술을 통하여 회로의 단락 상황에서 안전성을 확보하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.762-764
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• 1992

This Paper presents some experimental result of current limiting and short circuit interruption behavior of thin copper film, 12${\mu}m$, 25${\mu}m$, 40${\mu}m$, 50${\mu}m$ on alumina substrate. and a fuse-link having elements of copper film provided with high-precision small hols with electrolytical process. Construction, fabrication, as well as the test circuitry built especially for the develoment of this fuse-links are explained below.

• 한국정보통신학회논문지
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• 제17권10호
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• pp.2359-2368
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• 2013

본 논문에서는 power IC에서 파워가 ON되어있는 동안 입력 신호인 RD(Read) 신호 포트에 glitch와 같은 신호 잡음이 발생하더라도 파워-업(power-up)시 readout된 DOUT 데이터를 유지하면서 다시 읽기 모드로 재진입하지 못하도록 막아주는 IRD(Internal Read Data) 회로를 제안하였다. 그리고 pulsed WL(Word-Line) 구동방식을 사용하여 differential paird eFuse OTP 셀의 read 트랜지스터에 수 십 ${\mu}A$의 DC 전류가 흐르는 것을 방지하여 blowing 안된 eFuse 링크가 EM(Electro-Migration)에 의해 blowing되는 것을 막아주어 신뢰성을 확보하였다. 또한 program-verify-read 모드에서 프로그램된 eFuse 저항의 변동을 고려하여 가변 풀-업 부하(variable pull-up load)를 갖는 센싱 마진 테스트 기능을 수행하는 동시에 프로그램 데이터와 read 데이터를 비교하여 PFb(pass fail bar) 핀으로 비교 결과를 출력하는 회로를 설계하였다. $0.18{\mu}m$ 공정을 이용하여 설계된 8-비트 eFuse OTP IP의 레이아웃 면적은 $189.625{\mu}m{\times}138.850{\mu}m(=0.0263mm^2)$이다.

• Steel and Composite Structures
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• 제42권6호
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• pp.827-841
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• 2022

The rotation capacities of the plastic hinges located at beam-ends are significantly reduced in traditional steel framed-tube structures (SFTSs) because of the small span-to-depth ratios of the deep beams, leading to the low ductility and energy dissipation capacities of the SFTSs. High-strength steel framed-tube structures with replaceable shear links (HSSFTS-RSLs) are proposed to address this issue. A replaceable shear link is located at the mid-span of a deep spandrel beam to act as a ductile fuse to dissipate the seismic energy in HSSFTS-RSLs. A 2/3-scaled HSSFTS-RSL specimen with a shear link fabricated of high-strength low-alloy Q355 structural steel was created, and a cyclic loading test was performed to study the hysteresis behaviors of this specimen. The test results were compared to the specimens with soft steel shear links in previous studies to investigate the feasibility of using high-strength low-alloy steel for shear links in HSSFTS-RSLs. The effects of link web stiffener spaces on the cyclic performance of the HSSFTS-RSLs with Q355 steel shear links were investigated based on the nonlinear numerical analysis. The test results indicate that the specimen with a Q355 steel shear link exhibited a reliable and stable seismic performance. If the maximum interstory drift of HSSFTS-RSL is designed lower than 2% under earthquakes, the HSSFTS-RSLs with Q355 steel shear links can have similar seismic performance to the structures with soft steel shear links, even though these shear links have similar shear and flexural strength. For the Q355 steel shear links with web height-to-thickness ratios higher than 30.7 in HSSFTS-RSLs, it is suggested that the maximum intermediate web stiffener space is decreased by 15% from the allowable space for the shear link in AISC341-16 due to the analytical results.

• Steel and Composite Structures
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• 제35권3호
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• pp.305-325
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• 2020

Beams of steel frame-tube structures (SFTSs) typically have span-to-depth ratios of less than five. This makes a flexural beam unsuitable for such an application because the plastic hinges at the beam-ends cannot be adequately developed. This leads to lower ductility and energy dissipation capacities of SFTSs. To address this, SFTSs with bolted web-connected replaceable shear links (SFTS-BWSLs) are proposed. In this structural system, a web-connected replaceable shear link with a back-to-back double channel section is placed at the mid-length of the deep beam to act as a ductile fuse. This allows energy from earthquakes to be dissipated through link shear deformation. SFTS and SFTS-BWSL buildings were examined in this study. Several sub-structures were selected from each designed building and finite element models were established to study their respective hysteretic performance. The seismic behavior of each designed building was observed through static and dynamic analyses. The results indicate that the SFTS-BWSL and SFTS have similar initial lateral stiffness and shear leg properties. The SFTS-BWSL had lower strength, but higher ductility and energy dissipation capacities. Compared to the SFTS, the SFTS-BWSL had lower interstory drift, base shear force, and story shear force during earthquakes. This design approach could concentrate plasticity on the shear link while maintaining the residual interstory drift at less than 0.5%. The SFTS-BWSL is a reliable resistant system that can be repaired by replacing shear links damaged due to earthquakes.

• Steel and Composite Structures
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• 제30권4호
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• pp.365-382
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• 2019

In steel frame-tube structures (SFTSs) the application of flexural beam is not suitable for the beam with span-to-depth ratio lower than five because the plastic hinges at beam-ends can not be developed properly. This can lead to lower ductility and energy dissipation capacity of the SFTS. To address this problem, a replaceable shear link, acting as a ductile fuse at the mid length of deep beams, is proposed. SFTS with replaceable shear links (SFTS-RSLs) dissipate seismic energy through shear deformation of the link. In order to evaluate this proposal, buildings were designed to compare the seismic performance of SFTS-RSLs and SFTSs. Several sub-structures were selected from the design buildings and finite element models (FEMs) were established to study their hysteretic behavior. Static pushover and dynamic analyses were undertaken in comparing seismic performance of the FEMs for each building. The results indicated that the SFTS-RSL and SFTS had similar initial lateral stiffness. Compared with SFTS, SFTS-RSL had lower yield strength and maximum strength, but higher ductility and energy dissipation capacity. During earthquakes, SFTS-RSL had lower interstory drift, maximum base shear force and story shear force compared with the SFTS. Placing a shear link at the beam mid-span did not increase shear lag effects for the structure. The SFTS-RSL concentrates plasticity on the shear link. Other structural components remain elastic during seismic loading. It is expected that the SFTS-RSL will be a reliable dual resistant system. It offers the benefit of being able to repair the structure by replacing damaged shear links after earthquakes.