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A Study on the Shape of the Pattern Milled Using FIB

집속이온빔 연마에 의한 패턴의 형태에 관한 연구

  • Jung, Won-Chae (Department of Electronic Engineering, Kyonggi University)
  • 정원채 (경기대학교 전자공학과)
  • Received : 2014.08.07
  • Accepted : 2014.10.24
  • Published : 2014.11.01

Abstract

For the measurements of surface shape milled using FIB (focused ion beam), the silicon bulk, $Si_3N_4/Si$, and Al/Si samples are used and observed the shapes milled from different sputtering rates, incident angles of $Ga^+$ ions bombardment, beam current, and target material. These conditions also can be influenced the sputtering rate, raster image, and milled shape. The fundamental ion-solid interactions of FIB milling are discussed and explained using TRIM programs (SRIM, TC, and T-dyn). The damaged layers caused by bombarding of $Ga^+$ ions were observed on the surface of target materials. The simulated results were shown a little bit deviation with the experimental data due to relatively small sputtering rate on the sample surface. The simulation results showed about 10.6% tolerance from the measured data at 200 pA. On the other hand, the improved analytical model of damaged layer was matched well with experimental XTEM (cross-sectional transmission electron microscopy) data.

Acknowledgement

Supported by : 경기대학교

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