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    • 2. 发明授权
    • Self-aligned method for forming contact of device with reduced step height
    • 用于形成具有降低的台阶高度的装置的接触的自对准方法
    • US08367509B1
    • 2013-02-05
    • US13239030
    • 2011-09-21
    • Jeng-Hsing JangYi-Nan ChenHsien-Wen Liu
    • Jeng-Hsing JangYi-Nan ChenHsien-Wen Liu
    • H01L21/336
    • H01L29/66545H01L21/76897
    • A method for forming a contact of a semiconductor device with reduced step height is disclosed, comprising forming a plurality of gates, forming a buffer layer on each of the gates, forming an insulating layer to fill spaces between the gates, forming strip-shaped photoresist patterns which cross the gates, etching the insulating layer to form first openings using a self-aligning process with the gates and the strip-shaped photoresist patterns as a mask, forming a conductive contact layer to fill the first openings, performing a first chemical mechanical polish (CMP) process to the conductive contact layer, removing the buffer layer, and forming a second chemical mechanical polish (CMP) process to the conductive contact layer.
    • 公开了一种用于形成具有降低的台阶高度的半导体器件的接触的方法,包括形成多个栅极,在每个栅极上形成缓冲层,形成绝缘层以填充栅极之间的空间,形成带状光致抗蚀剂 通过栅极和带状光致抗蚀剂图案作为掩模蚀刻绝缘层以形成第一开口,形成导电接触层以填充第一开口,执行第一化学机械 抛光(CMP)工艺到导电接触层,去除缓冲层,以及对导电接触层形成第二化学机械抛光(CMP)工艺。
    • 10. 发明授权
    • Method for forming openings in semiconductor device
    • 在半导体器件中形成开口的方法
    • US08642479B2
    • 2014-02-04
    • US13183358
    • 2011-07-14
    • Chih-Ching LinYi-Nan ChenHsien-Wen Liu
    • Chih-Ching LinYi-Nan ChenHsien-Wen Liu
    • H01L21/302
    • H01L21/76802H01L21/31144H01L21/32137
    • A method for forming an opening in a semiconductor device is provided, including: providing a semiconductor substrate with a silicon oxide layer, a polysilicon layer and a silicon nitride layer sequentially formed thereover; patterning the silicon nitride layer, forming a first opening in the silicon nitride layer, wherein the first opening exposes a top surface of the polysilicon layer; performing a first etching process, using gasous etchants including hydrogen bromide (HBr), oxygen (O2), and fluorocarbons (CxFy), forming a second opening in the polysilicon layer, wherein a sidewall of the polysilicon layer adjacent to the second opening is substantially perpendicular to a top surface of the silicon oxide layer, wherein x is between 1-5 and y is between 2-8; removing the silicon nitride layer; and performing a second etching process, forming a third opening in the silicon oxide layer exposed by the second opening.
    • 提供了一种在半导体器件中形成开口的方法,包括:向半导体衬底提供其上顺序形成的氧化硅层,多晶硅层和氮化硅层; 图案化氮化硅层,在氮化硅层中形成第一开口,其中第一开口暴露多晶硅层的顶表面; 使用包括溴化氢(HBr),氧(O 2)和碳氟化合物(C x F y)的气体蚀刻剂进行第一蚀刻工艺,在多晶硅层中形成第二开口,其中与第二开口相邻的多晶硅层的侧壁基本上 垂直于氧化硅层的顶表面,其中x在1-5之间,y在2-8之间; 去除氮化硅层; 以及进行第二蚀刻工艺,在由所述第二开口暴露的所述氧化硅层中形成第三开口。