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    • 91. 发明专利
    • MANUFACTURE OF SEMICONDUCTOR DEVICE
    • JPH07193065A
    • 1995-07-28
    • JP33128893
    • 1993-12-27
    • NEC CORP
    • SUGAI KAZUMI
    • H01L23/52C23C16/02C23C16/12H01L21/205H01L21/28H01L21/3205H01L21/768H01L23/522
    • PURPOSE:To obtain a smooth and thick aluminum film by a method wherein a process in which an aluminum film having a thickness not larger than a specific value is formed on a substrate surface covered with a titanium film by vapor phase chemical growth using organic aluminum gas and a process in which the temperature of the substrate is elevated are repeated a plurality of times. CONSTITUTION:A first aluminum film 4 having a thickness not larger than 0.2mum is formed by vapor phase chemical growth using dimethyl aluminum hydride over the whole surface of a silicon substrate 1 on which a silicon oxide film 2 and a titanium film 3 are formed. Then, if the temperature of the substrate 1 is elevated, titanium atoms in the titanium foundation film 3 are partially diffused and Ti is deposited on the surface of the first aluminum film 4. Then the vapor phase chemical growth using dimethyl aluminum hydride is performed again under the same conditions to deposit a second aluminum film 6 having a thickness not larger than 0.2mum with the Ti 5 as cores. Successively, the temperature elevating process and the vapor phase chemical process are repeated a plurality of times to form an aluminum film 7 having a smooth surface appearance.