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    • 6. 发明授权
    • Method for manufacturing semiconductor device
    • 制造半导体器件的方法
    • US08207014B2
    • 2012-06-26
    • US12826021
    • 2010-06-29
    • Toshinari SasakiJunichiro SakataHiroki OharaShunpei Yamazaki
    • Toshinari SasakiJunichiro SakataHiroki OharaShunpei Yamazaki
    • H01L21/00
    • H01L21/477H01L21/02565H01L21/02664H01L21/383H01L21/46H01L27/1225H01L29/66969H01L29/7869H01L29/78693
    • An object is to manufacture a highly reliable semiconductor device including a thin film transistor with stable electric characteristics. In a method for manufacturing a semiconductor device including a thin film transistor in which an oxide semiconductor film is used for a semiconductor layer including a channel formation region, heat treatment (for dehydration or dehydrogenation) is performed to improve the purity of the oxide semiconductor film and reduce impurities including moisture or the like. After that, slow cooling is performed under an oxygen atmosphere. Besides impurities including moisture or the like exiting in the oxide semiconductor film, heat treatment causes reduction of impurities including moisture or the like exiting in a gate insulating layer and those in interfaces between the oxide semiconductor film and films which are provided over and below the oxide semiconductor and in contact therewith.
    • 本发明的目的是制造具有稳定电特性的薄膜晶体管的高度可靠的半导体器件。 在包括使用氧化物半导体膜用于包括沟道形成区域的半导体层的薄膜晶体管的半导体器件的制造方法中,进行热处理(脱水或脱氢)以提高氧化物半导体膜的纯度 并减少杂质,包括水分等。 之后,在氧气氛下进行缓慢冷却。 除了在氧化物半导体膜中排出的含有水分等的杂质以外,热处理会导致在栅极绝缘层中退出的杂质,包括氧化物半导体膜和膜之间的界面中的杂质,氧化物半导体膜和氧化物之间和之下的界面 半导体并与其接触。
    • 7. 发明授权
    • Semiconductor device and manufacturing method thereof
    • 半导体装置及其制造方法
    • US08796078B2
    • 2014-08-05
    • US12787757
    • 2010-05-26
    • Toshinari SasakiHiroki OharaJunichiro Sakata
    • Toshinari SasakiHiroki OharaJunichiro Sakata
    • H01L21/336H01L21/786
    • H01L29/66969H01L21/02164H01L21/02565H01L21/30604H01L29/45H01L29/78618H01L29/7869H01L29/78696
    • An object is to provide a highly reliable semiconductor device including a thin film transistor having stable electric characteristics. In addition, another object is to manufacture a highly reliable semiconductor device at low cost with high productivity. In a method for manufacturing a semiconductor device including a thin film transistor including an oxide semiconductor layer as a channel formation region, the oxide semiconductor layer is heated under a nitrogen atmosphere to lower its resistance, thereby forming a low-resistance oxide semiconductor layer. Further, resistance of a region of the low-resistance oxide semiconductor layer, which is overlapped with a gate electrode layer, is selectively increased, thereby forming a high-resistance oxide semiconductor layer. Resistance of the oxide semiconductor layer is increased by forming a silicon oxide film in contact with the oxide semiconductor layer by a sputtering method.
    • 目的在于提供一种具有稳定电特性的薄膜晶体管的高度可靠的半导体装置。 此外,另一个目的是以高生产率以低成本制造高度可靠的半导体器件。 在包括具有作为沟道形成区域的氧化物半导体层的薄膜晶体管的半导体器件的制造方法中,在氮气气氛下加热氧化物半导体层以降低其电阻,从而形成低电阻氧化物半导体层。 此外,选择性地增加与栅电极层重叠的低电阻氧化物半导体层的区域的电阻,从而形成高电阻氧化物半导体层。 通过溅射法形成与氧化物半导体层接触的氧化硅膜,可提高氧化物半导体层的电阻。