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    • 5. 发明授权
    • Method for fabricating LOCOS isolation
    • LOCOS隔离制造方法
    • US06225186B1
    • 2001-05-01
    • US09227092
    • 1999-01-05
    • Lin-Chin SuTzu-Ching TsaiMinn-Jiunn Jiang
    • Lin-Chin SuTzu-Ching TsaiMinn-Jiunn Jiang
    • H01L2176
    • H01L21/76205
    • A method for fabricating a LOCOS isolation in accordance with the present invention, involves first forming a masking layer on the active region of a silicon substrate. Next, the masking layer is used as the etching mask and the silicon substrate is etched to form a recess. Then, a thin nitride layer is formed on the masking layer and the recess. Afterwards, a polysilicon layer is deposited on the thin nitride layer. Then, an etching process is applied to etch back the polysilicon and the thin nitride layer, thereby exposing the upper surface of the masking layer. Next, a LOCOS isolation is grown above the recess.
    • 根据本发明的用于制造LOCOS隔离的方法包括首先在硅衬底的有源区上形成掩模层。 接下来,使用掩模层作为蚀刻掩模,并蚀刻硅衬底以形成凹部。 然后,在掩模层和凹部上形成薄的氮化物层。 之后,在薄氮化物层上沉积多晶硅层。 然后,施加蚀刻工艺来蚀刻多晶硅和薄氮化物层,从而暴露掩模层的上表面。 接下来,在凹部上方生长LOCOS隔离。