68
Hot Plates
Widely used in the industry Back side heating, no surface “crust” In-line track system
2021
69
Wafer Cooling
Need to cool down to ambient temperature
圆片放置在真空卡盘上
高速旋转
液态光刻胶滴在圆片中心
光刻胶以离心力向外扩展
均匀涂覆在圆片表面
2021
46
粘性 Viscosity
Fluids stick on the solid surface Affect PR thickness in spin coating Related to PR type and temperature 旋转速率越高,涂覆越均匀
Water-cooled chill plate
Silicon thermal expansion rate: 2.5x106/°C
For 8 inch (200 mm) wafer, 1 °C change
2021
70
Alignment and Exposure
IC制造的最关键过程Most critical process for IC fabrication
-Ion implantation blocking
2021
24
光刻工艺 Photolithography Process
光刻基本步骤
• 涂胶 Photoresist coating • 对准和曝光 Alignment and exposure • 显影 Development
2021