• 제목/요약/키워드: Nano-machining

검색결과 189건 처리시간 0.029초

나노인프로세스 형상계측 및 미세가공용 프로브의 개발 (Development of a New Probe to Realize Nano/Micro Mechanical Machining and In-Process Profile Measurement)

  • 권현규;최성대
    • 한국기계가공학회지
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    • 제2권1호
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    • pp.75-84
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    • 2003
  • In this paper, a new nano/micro-mechanical processing test machine was developed. This new test machine, which is based on the principle of the scanning force controlled probe microscope, can realize nano/micro-mechanical machining and in-process profile measurement. Experimental results of nano/micro indentation and scratching show that the controllable cutting depth of the test machine can be controlled by PZT actuator. Profile measurement of the machined surface has also been performed by using the test machine and a conventional AFM(Atomic Force Microscopy). A good agreement of the two measurement results have been achieved.

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자동차 부품용 Fe계 저합금 분말 소결품의 마찰마모 특성 연구 (A Study on Tribological Characteristics of Sintered Fe-base Low Alloy Powder for Automobile Parts)

  • 김태현;김상윤;김태규
    • 한국기계가공학회지
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    • 제11권6호
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    • pp.139-144
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    • 2012
  • In the automobile industry, the various efforts to lower their industrial cost and enhance fuel efficiency have been made through process improvement or weight saving of automobile parts. Gear is one of significant parts of transmission, which is made by cast iron or alloy steel. It is expensive due to complex processing, inferior materials and large machining allowance. In this study, alternative gear cars oil which is based on fluid applications materials is produced by reducing surface induction hardening and carburizing hardened in production. And then, wear characteristic and mechanical properties such as hardness of the sintered alloy which is used as a substitute for small machining allowance is investigated.

하이브리드 쾌속 조형 시스템의 개발 및 나노 복합재 부품 제작 (Development of Hybrid RP System and Fabrication of Nano Composite parts)

  • 김성근;정우균;추원식;김형중;안성훈
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2005년도 추계학술대회 논문집
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    • pp.220-223
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    • 2005
  • The rapid prototyping (RP) technology has been advanced for various applications such as verification of design, functional test. However, many RP machines still have low accuracy and limitation of applications for various materials. In this research, a hybrid RP system was developed to improve precision of micro parts. This hybrid system consists of deposition and material removal process by mechanical micro machining to fabricate nano composites using photo-curable polymer resin with various nano particles. In this work, using hybrid RP process with Multi-Walled Carbon Nano Tube (MWCNT) and hydroxyapatite, micro parts were fabricated. The precision of parts was evaluated based on the original CAD design, and to see the effect of nano particles on mechanical properties, tensile strength was measured. From the results of experiments, it was confirmed that the part made by hybrid process had higher precision, and the addition of nano particles improved mechanical properties.

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빔 쉐이핑된 펨토초 레이저를 이용한 터치스크린 패널의 ITO 박막 패터닝 (Patterning of ITO on Touch Screen Panels using a beam shaped femtosecond laser)

  • 김명주;김용현;윤지욱;최원석;조성학;최지연
    • 한국레이저가공학회지
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    • 제16권4호
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    • pp.1-6
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    • 2013
  • Femtosecond laser patterning of ITO on a touch screen panel with a shaped fs laser beam was investigated. A quasi flat-top beam was formed using a variable mask and a planoconvex lens. The spatial profile of the original Gaussian beam and the shaped beam were monitored by a CCD beam profiler. The laser patterned ITO film was examined using an optical microscope, Scanning Electron Microscope (SEM) with Energy Dispersive X-ray Spectroscopy (EDS), and Atomic Force Microscope (AFM). It turned out that the quality of the ITO pattern fabricated by a shaped beam is superior to that of the pattern without beam shaping in terms of debris generation, height of the craters, and homogeneity of the bottom. Optimum processing window was determined at the laser irradiance exhibiting 100% removal of Sn. The removal rate of In was measured to be 83%.

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단결정 다이아몬드 공구에 의한 비철금속과 폴리머 소재의 마이크로 트렌치 가공특성 비교 (Comparison of Micro Trench Machining Characteristics with Nonferrous Metal and Polymer using Single Diamond Cutting Tool)

  • 최환진;전은채;최두선;제태진;강명창
    • 한국분말재료학회지
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    • 제20권5호
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    • pp.355-358
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    • 2013
  • Micro trench structures are applied in gratings, security films, wave guides, and micro fluidics. These micro trench structures have commonly been fabricated by micro electro mechanical system (MEMS) process. However, if the micro trench structures are machined using a diamond tool on large area plate, the resulting process is the most effective manufacturing method for products with high quality surfaces and outstanding optical characteristics. A nonferrous metal has been used as a workpiece; recently, and hybrid materials, including polymer materials, have been applied to mold for display fields. Thus, the machining characteristics of polymer materials should be analyzed. In this study, machining characteristics were compared between nonferrous metals and polymer materials using single crystal diamond (SCD) tools; the use of such materials is increasing in machining applications. The experiment was conducted using a square type diamond tool and a shaper machine tool with cutting depths of 2, 4, 6 and 10 ${\mu}m$ and a cutting speed of 200 mm/s. The machined surfaces, chip, and cutting force were compared through the experiment.

방전/전해 가공을 이용한 미세금형가공 (Micro Mold Machining Using EDM/ECM)

  • 정도관;신홍식;최세환;김보현;주종남
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2007년도 춘계학술대회 논문집
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    • pp.75-78
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    • 2007
  • Recently, the need for micro mold or micro mechanical parts has been rapidly increased. As feature size decreases, conventional machining processes show their limitation. Micro electrical discharging machining (EDM) and electrochemical machining (ECM) have many advantages in micro machining. They can be used to make structures of micro scale, or even nano scale size. In this paper, the application of micro EDM and ECM has been investigated.

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AFM 가공 모드 분석 및 AE 모니터링 (Characterization of AFM machining mode and Acoustic Emission monitoring)

  • 안병운;이성환
    • 한국정밀공학회지
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    • 제25권10호
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    • pp.41-47
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    • 2008
  • This study aims to obtain machining characteristics during AFM (Atomic force Microscope) machining of silicon wafers and to monitor the machining states using acoustic emission. As in micro scale machining, two distinct regimes of deformation, i. e. ploughing regime and cutting regime were observed. First, the transition between the two regimes are investigated by analyzing the "pile-up" during machining. As far as in process monitoring is concerned, in the ploughing repime, no chips have been formed and related AE RMS values are relatively low, In the mean time, in the cutting regime, the RMS values are significantly higher than the ploughing regime, with apparent chip formation. From the results, we found out that the proposed scheme can be used for the monitoring of nanomachining, especially for the characterization of nanocutting mode transition.

미세패턴 평판 금형가공 기술동향 (Trends of Flat Mold Machining Technology with Micro Pattern)

  • 제태진;최두선;전은채;박언석;최환진
    • 한국기계가공학회지
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    • 제11권2호
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    • pp.1-6
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    • 2012
  • Recent ultra-precision machining systems have nano-scale resolution, and can machine various shapes of complex structures using five-axis driven modules. These systems are also multi-functional, which can perform various processes such as planing, milling, turning et al. in one system. Micro machining technology using these systems is being developed for machining fine patterns, hybrid patterns and high aspect-ratio patterns on large-area molds with high productivity. These technology is and will be applied continuously to the fields of optics, display, energy, bio, communications and et al. Domestic and foreign trends of micro machining technologies for flat molds were investigated in this study. Especially, we focused on the types and the characteristics of ultra-precision machining systems and application fields of micro patterns machined by the machining system.

선택적 빔 차단을 통한 집속이온빔 가공 정밀도 향상 (Improvement of Ion Beam Resolution in FIB Process by Selective Beam Blocking)

  • 한민희;한진;김태곤;민병권;이상조
    • 한국정밀공학회지
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    • 제27권8호
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    • pp.84-90
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    • 2010
  • In focused ion beam (FIB) fabrication processes the ion beam intensity with Gaussian profile has a drawback for high resolution machining. In this paper, the fabrication method to modify the beam profile at substrate using silt mask is proposed to increase the machining resolution at high current. Slit mask is utilized to block the part of beam and transmit only high intensity portion. A nano manipulator is utilized to handle the silt mask. Geometrical analysis on fabricated profile through silt mask was conducted. By utilizing proposed method, improvement of machining resolution was achieved.

배분력의 정량적인 분석을 통한 단결정실리콘의 나노패턴 연성가공법 연구 (Study on Ductile Machining Technology for Manufacturing Nano-Patterns on Single Crystal Silicon through Quantitative Analysis of Thrust Force)

  • 최대희;전은채;윤민아;김광섭;제태진;정준호
    • 한국정밀공학회지
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    • 제33권1호
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    • pp.11-16
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    • 2016
  • Lithography techniques are generally used to manufacture nano-patterns on silicon, however, it is difficult to make a V-shaped pattern using these techniques. Although silicon is a brittle material, it can be treated as a ductile material if mechanically machined at extremely low force scale. The manufacturing technique of nano-patterns on single crystal silicon using a mechanical method was developed in this study. First, the linear pattern was machined on the silicon with increasing thrust force. Then, the correlation between measured cutting force and machined pattern was analyzed. Based on the analysis, the critical thrust force was quantitatively determined, and then the silicon was machined at a force lower than the critical thrust force. The machined pattern was observed using SEM and AFM to check for the occurrence of brittle fractures. Finally, the sharp V-shaped nano-pattern was manufactured on the single crystal silicon.