钨
氩
材料科学
溅射
硅
溅射沉积
电阻率和电导率
沉积(地质)
微观结构
图层(电子)
半导体
薄膜
冶金
光电子学
复合材料
纳米技术
化学
电气工程
古生物学
有机化学
工程类
生物
沉积物
作者
Nathalie Verbrugghe,Didier Fasquelle,B. Duponchel,Stéphanie Députier
摘要
In order to realize cost-effective semiconductor gas sensors, the authors have studied the feasibility of replacing platinum by tungsten for the metallic layer of heaters in a moderate temperature range (25–400 °C). Tungsten films were deposited on silicon substrates by direct current magnetron sputtering in argon gas. The deposition of tungsten films was investigated at various working gas pressures to modify the microstructure. The results have shown that low-stressed films showed a good adhesion to silicon substrates. Resistivity values as low as 27 μΩ cm were obtained for 600 nm films deposited at low argon pressure. After a thermal treatment at 500 °C for 30 min., no resistivity variation occurred for films deposited at low argon pressure. Finally, three different structures of tungsten heaters were elaborated by using an optical lithography technique and tested for 300 h at 400 °C.
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