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    • 4. 发明申请
    • ISOLATED TRI-GATE TRANSISTOR FABRICATED ON BULK SUBSTRATE
    • 散装基板上制造的隔离式三栅极晶体管
    • WO2009012053A3
    • 2009-03-12
    • PCT/US2008068855
    • 2008-06-30
    • INTEL CORPRIOS RAFAELKAVALIEROS JACK TCEA STEPHEN M
    • RIOS RAFAELKAVALIEROS JACK TCEA STEPHEN M
    • H01L21/336H01L21/3205
    • H01L29/66795H01L29/785
    • A method of forming an isolated tri-gate semiconductor body comprises patterning a bulk substrate to form a fin structure, depositing an insulating material around the fin structure, recessing the insulating material to expose a portion of the fin structure that will be used for the tri-gate semiconductor body, depositing a nitride cap over the exposed portion of the fin structure to protect the exposed portion of the fin structure, and carrying out a thermal oxidation process to oxidize an unprotected portion of the fin structure below the nitride cap. The oxidized portion of the fin isolates the semiconductor body that is being protected by the nitride cap. The nitride cap may then be removed. The thermal oxidation process may comprise annealing the substrate at a temperature between around 900°C and around 1100°C for a time duration between around 0.5 hours and around 3 hours.
    • 一种形成隔离的三栅极半导体主体的方法包括:图案化体衬底以形成鳍状结构;在鳍状结构周围沉积绝缘材料;使绝缘材料凹陷以暴露将用于三端口的鳍状结构的一部分 在所述鳍结构的暴露部分上沉积氮化物帽以保护所述鳍结构的暴露部分,并且执行热氧化工艺以氧化所述氮化物帽下方的所述鳍结构的未受保护部分。 鳍状物的氧化部分隔离被氮化物帽保护的半导体主体。 然后可以去除氮化物帽。 热氧化工艺可以包括在约900℃和约1100℃之间的温度下退火衬底约0.5小时至约3小时之间的持续时间。