• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.04b
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• pp.481-484
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• 1995

3차원 CDA 시스템의 보급 및 설계단게에 적용이 확대 되어 가면서 CAD 시스템에 의한 3차원 입체모형제작 기술에 많은 관심이 주목되고있다. 특히 최근에는 광조형 장치가 상품개발사이클의 단축화와 Concurrent Engineering 실현의 중요한 도구로써 자리매김을 하고있으므로 본 논문에서는 광조형장치의 구성 및 조형 사례에 대하여 기술하고자 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.41-41
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• 2003

• Journal of the Korean Society for Precision Engineering
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• v.24 no.12
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• pp.128-135
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• 2007

Micro-channels for a wave micropump have been fabricated using the Stereolithography and UV Photolithography. The micro-channel with a channel height of $500\;{\mu}m$ was fabricated with stereolithography. UV photolithography was used for producing micro-channels with a channel length less than $100\;{\mu}m$. The fabrication process data including spinning rpm, pre-bake and post-bake time, and develop time for single layer and multiple layer 3D micro-structures using SU-8 photo resist are experimentally found. A film mask printed with a 40,000 dpi laser printer was used for UV lithography and micro-structures in the order of tens of micrometers in dimension were successfully fabricated.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.6
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• pp.99-105
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• 1997

Recently, with a great interest in micromachine, it is more and more important to promote the way of manufacturing micromachine. The silicon process or the LIGA process was the main method to manufacture micromachine in the past. But, these manufacturing method was 2.5-dimensinal, there was the limit in manufacturing perfect 3-dimensional structure micromachine. In this study, we developed the rapid prototyping system for micromachining and tested its property. We also realized .mu. m-order manu- facturing and 3-dimensional structure processing. The results showed the possibility of micromachining with the rapid prototyping system.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1992.10a
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• pp.106-110
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• 1992

컴퓨터에 의한 입체 형상 이용 기술의 발달로 3차원 CAD 데이타 형상의 제품을 2차원 형상의 층으로 연속적으로 적층 하는 입체인쇄(Stereolithography)기술개발이 활발하게 이뤄지고 있어 부품설계와 생산에 혁신을 예고하고 있으며, 이 같은 입체 인쇄 기술 중에서 특히, 특정 주파수의 빛에 의하여 경화되는 광 경화성수지(Photopolymer)에 레이저(Laser)를 주사하면 표면의 미소경화부만 경화되는 성질을 이용하여 소재를 경화시키는 광 조형법리 각광을 받고 있다. 본 논문에서는 광조형법에 의한 모델성형시 레이저빔의 조사에 의하여 야기되는 광경화성 수지의 상변화에 의한 성형물의 수축 및 뒤틀림에 대한 연구를 수행하였다

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.305-305
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• 2004

쾌속조형 기술은 3차원 CAD 데이터를 일정한 두께 간격으로 슬라이싱한 각 층을 다양한 방법으로 만들고, 이러한 층을 한층씩 적층하여 원하는 3차원 형상을 신속하게 제작하는 기술이다. 쾌속 조형법은 초기에는 광(beam)에 의해 형상이 만들어진다고 하여 광조형법이라고 불렸다. 그 후 시작품(Prototype)을 신속(Rapid)하게 제작할 수 있다는 사실로부터 'Rapid Prototyping' 또는 '쾌속 조형법' 이라고 불려지게 되었다.(중략)

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.847-851
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• 1997

In the stereolithography process, the accuracy of cured shape depends on laser power, scanning speed, scanning pattern, resin characteristics etc. When three-dimensional objects are built, higher laser power gives higher building efficiency. Normally we could control scanning speed and scanning pattern, which affect curing thickness and generate volume of curl in & after building. Oligomer, Monomer and Initiator are major components. Kinds and of them decide characteristic of resin. In this paper, we deak with major facts and their characteristics for precision shape building.

• Journal of the Korean Society for Precision Engineering
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• v.14 no.5
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• pp.15-21
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• 1997

In the stereolithography process, the accuracy of cured shape depends on laser power, scanning speed, scanning pattern, resin characteristics etc. When three-dimensional objects are built, higher laser power gives higher building efficiency. Normally we could control scanning speed and scanning pattern, which affect curing thickness and generate volume of curl in & after building. Olgomer, Monomer and Initiator are major components. Kinds and volume of them decide characteristic of resin. In this paper, we deal with major facts and their characteristics for precision shape building.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.10
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• pp.188-195
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• 2004

In this paper, we fabricated fluidic devices like micro-channel, pump, mixer and particular gas separator with the technology of stereolithouaphy using RP(rapid-prototyping). The fabricated fluidic devices are expected to be applied to develop Lab-on-a chip type liquid analyzer. Stereolithography technology seems effective for fabricating MEMS(Micro Electro Mechanical System) with complicated structure because it makes three dimensional fabrication possible but, exclusive devices are needed to be developed fur fabricating even more microscopic MEMS structure.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.12 no.1
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• pp.16-23
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• 2003

Keeping the layer thickness constant is very essential for improving the shape accuracy in the stereolithography process. The layer thickness is created by recoating process, and also affected by recoating parameters such as blade speed and thickness. The created layer in this process can determine the whole accuracy of the entire parts. The aim of this paper is to improve the accuracy of the layer thickness by adjusting the recoating process parameters. Several experiments with different recoating conditions are Performed to find the optimal recoating parameters that produce the most accurate layer thickness. The effective recoating method is suggested by measuring and analyzing the cured layer thickness.