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    • 4. 发明授权
    • Breakdown evaluating test element
    • 故障评估测试元件
    • US5179433A
    • 1993-01-12
    • US713981
    • 1991-06-12
    • Hisanori MisawaMasakazu Shiozaki
    • Hisanori MisawaMasakazu Shiozaki
    • G01R31/26H01L21/66
    • G01R31/261
    • A breakdown evaluating test element insert an oxide film having thin thick portion and formed on a silicon wafer and a polysilicon film formed on the oxide film, in such a way that a capacitor is formed between the silicon wafer and the polysilicon film with the oxide film as dielectric. The area of the polysilicon film is made larger than that of the thin portion of the oxide film so that only the thin portion thereof is brought into breakdown at a predetermined probability by an electric field strength generated at the thin portion when an electric field is applied to the wafer and when no electron shower is used (no breakdown prevention countermeasure is taken) during ion implantation, for instance. Therefore, the effect of the electron shower can be confirmed by checking the resistivity of the thin oxide film portion after the wafer has been ion-implanted by using an electron shower.
    • 击穿评估测试元件插入形成在硅晶片上的薄厚氧化膜和形成在氧化膜上的多晶硅膜,使得在硅晶片和多晶硅膜之间形成电容器,氧化膜 作为电介质。 使多晶硅膜的面积比氧化膜的薄部的面积大,使得当施加电场时,在薄部分产生的电场强度只有其薄的部分以预定的概率被击穿 例如在离子注入期间,不使用电子淋浴(没有防止击穿的对策)。 因此,可以通过使用电子淋浴器在离子注入晶片之后检查薄氧化膜部分的电阻率来确认电子淋浴的效果。