• Title/Summary/Keyword: 미세회로

Search Result 807, Processing Time 0.033 seconds

Bending Strength and Microstructure of Brick Body from Fly-ash Clay Mixture (석탄회-점토계 벽돌소지의 곡강도와 미세구조)

  • 이기강;김동원
    • Journal of the Korean Crystal Growth and Crystal Technology
    • /
    • v.3 no.1
    • /
    • pp.45-58
    • /
    • 1993

  • Owing to consecutive start of operation of large-scale coal-fired power plants in Korea, the ash production amounts to about 2 million tons per year. The impact of rising disposal costs, looming environmental problems and increased ash tonnages has heightened the concerns about coal ash utilization. The paper mainly describes the correlation between bending strength and microstructure of brick body from fly ash and clay mixture. The results show that bending strength depends mainly on the size and quantity of pore, the sinterability of matrix, and the crack due to the coarse quarts grain, and that the brick body added 15 wt.% fly ash has the best bending strength over the whole firing range.

  • PDF

Development of Automatic Visual Inspection System for Micro Needle (미세 탐침의 비전 자동 검사 시스템 개발)

  • Kang, Su-Min;Han, Kwang-Hee;Huh, Kyung-Moo
    • Journal of the Institute of Electronics Engineers of Korea SC
    • /
    • v.45 no.6
    • /
    • pp.16-25
    • /
    • 2008

  • The micro needle means the ultrafine probe of 'Probe Card'. The size of micro needle is so minute that it is difficult to minute that it is difficult to inspect it with eyes. On the other hand it is very critical if there is a defect in micro needle of probe card. In this study, we developed an automatic visual inspection system for finding defect status in probe angle, tip length and diameter. Through the experimental results, we could find that our proposed method is better than human-eyes inspection method in accuracy and inspection speed, and also in robustness to lighting circumstances.

  • PDF KSCI