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반송 시 웨이퍼 이탈을 최소화 하기 위한 새로운 형태의 웨이퍼 가이드 메커니즘
김대원,유지환,Kim, Dea-Won,Ryu, Jee-Hwan 한국반도체디스플레이기술학회 2010 반도체디스플레이기술학회지 Vol.9 No.1
In this paper, wafer drop from wafer guide mechanism, which is one of the serious problems in water transfer robot, is analyzed, and new wafer guide mechanisms are proposed to minimize this drop. Three types of new wafer guide mechanisms are proposed: roller type, gear type and L-shape rocker type. We choose one of the proposed mechanism, which is roller type, and verified this mechanism through real transfer experiment. Wafer picking up test is conducted with initial aligning error for simulating the wafer drop. Number of drop is compared between conventional mechanism and proposed mechanism. As a result, we can find the proposed mechanism can reduce the number of wafer drop dramatically.
홍석형 ( Suk-hyung Hong ),김대원 ( Dea-won Kim ),박수민 ( Soo-min Park ),김승홍 ( Seung-hong Kim ),신용태 ( Yong-tae Shin ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2
컴퓨터 포렌식(Computer Forensics) 기술은 주로 컴퓨터에 내장된 디지털 자료를 근거로 그 컴퓨터를 매개체로 어떤 행위의 사실관계를 규명하고 증명하는 기법이다. 디지털 증거의 무결성을 제공하기 위해 해쉬 알고리즘이나 오류 검증 알고리즘을 변조탐지코드(MDC, Manipulation Detection Code)로 사용하기 때문에 해쉬 값과 체크섬 정보를 위·변조가 가능하다. 따라서 본 논문에서는 디지털 증거의 무결성을 유지할 수 있는 방법과 절차를 제안한다.
안동규(Dong-Gyu Ahn),김대원(Dea-Won Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
The objective of this paper is to investigate into the influence of the injection conditions on the insert deformation and the wall thickness of the injection part using the three-dimensional injection molding analysis. Full three-dimensional insert model was added to the injection molding analysis model to consider the effects of insert deformation during the injection molding process. In order to obtain the optimum injection molding condition with a minimum insert deformation, degree of experiments were utilized. From the results of the analyses, it was shown that the optimum injection condition is injection time of 1.6 sec, injection pressure of 30 ㎫a and packing time of 15 sec. In addition it was shown that the wall thickness is approached to target thickness when the core deformation is considered in the injection molding analysis.