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    • 4. 发明授权
    • Semiconductor structures and manufacturing methods
    • 半导体结构及制造方法
    • US06605860B1
    • 2003-08-12
    • US09597442
    • 2000-06-20
    • Helmut Horst TewsAlexander MichaelisStephan KudelkaUwe SchroederRaj JammyUlrike Gruening
    • Helmut Horst TewsAlexander MichaelisStephan KudelkaUwe SchroederRaj JammyUlrike Gruening
    • H01L2906
    • H01L21/28202H01L21/02164H01L21/0217H01L21/0223H01L21/02238H01L21/02247H01L21/02255H01L21/2822H01L21/3144H01L21/31658H01L27/10864H01L29/045H01L29/42368H01L29/512H01L29/513H01L29/518H01L29/66666H01L29/7827Y10S257/905
    • A method for forming substantially uniformly thick, thermally grown, silicon dioxide material on a silicon body independent of bon axis. A trench is formed in a surface of the silicon body, such trench having sidewalls disposed in different crystallographic planes, one of such planes being the crystallographic plane and another one of such planes being the plane. A substantially uniform layer of silicon nitride is formed on the sidewalls. The trench, with the with substantially uniform layer of silicon nitride, is subjected to a silicon oxidation environment with sidewalls in the plane being oxidized at a higher rate than sidewalls in the plane producing silicon dioxide on the silicon nitride layer having thickness over the plane greater than over the plane. The silicon dioxide is subjected to an etch to selectively remove silicon dioxide while leaving substantially un-etched silicon nitride to thereby remove portions of the silicon dioxide over the plane and to thereby expose underlying portions of the silicon nitride material while leaving portions of the silicon dioxide over the plane on underlying portions of the silicon nitride material. Exposed portions of the silicon nitride material are selectively removed to expose underlying portions of the sidewalls of the trench disposed in the plane while leaving substantially un-etched portions of the silicon nitride material disposed on sidewalls of the trench disposed in the plane. The structure is then subjected to an silicon oxidation environment to produce the substantially uniform silicon dioxide layer on the sidewalls of the trench.
    • 一种在硅主体上形成基本上均匀的厚的热生长二氧化硅材料的方法,其独立于凸轮轴。 沟槽形成在硅体的表面中,这样的沟槽具有设置在不同结晶平面中的侧壁,这些平面中的一个是100晶体平面,另外一个这样的平面是“10”平面。 在侧壁上形成基本均匀的氮化硅层。 具有基本上均匀的氮化硅层的沟槽经受硅氧化环境,其中<110>面中的侧壁以比在100平面中的侧壁更高的速率被氧化,在氮化硅层上产生二氧化硅 具有比<110>平面上的厚度大于超过<100>平面的厚度。 对二氧化硅进行蚀刻以选择性地去除二氧化硅,同时留下基本未蚀刻的氮化硅,从而在<100>平面上除去二氧化硅的一部分,从而暴露氮化硅材料的下面部分,同时留下部分 在氮化硅材料的下面部分上的<110>面上的二氧化硅。 选择性地去除氮化硅材料的暴露部分以暴露设置在<100>平面中的沟槽的侧壁的下面部分,同时留下设置在设置在<110>平面中的沟槽的侧壁上的氮化硅材料的基本上未蚀刻的部分 >飞机。 然后将该结构进行硅氧化环境以在沟槽的侧壁上产生基本均匀的二氧化硅层。
    • 5. 发明授权
    • Semiconductor structures and manufacturing methods
    • 半导体结构及制造方法
    • US06740555B1
    • 2004-05-25
    • US09408248
    • 1999-09-29
    • Helmut Horst TewsAlexander MichaelisStephan KudelkaUwe SchroederRaj JammyUlrike Gruening
    • Helmut Horst TewsAlexander MichaelisStephan KudelkaUwe SchroederRaj JammyUlrike Gruening
    • H01L218242
    • H01L21/28202H01L21/02164H01L21/0217H01L21/0223H01L21/02238H01L21/02247H01L21/02255H01L21/2822H01L21/3144H01L21/31658H01L27/10864H01L29/045H01L29/42368H01L29/512H01L29/513H01L29/518H01L29/66666H01L29/7827Y10S257/905
    • A method for forming substantially uniformly thick, thermally grown, silicon dioxide material on a silicon body independent of axis. A trench is formed in a surface of the silicon body, such trench having sidewalls disposed in different crystallographic planes, one of such planes being the crystallographic plane and another one of such planes being the plane. A substantially uniform layer of silicon nitride is formed on the sidewalls. The trench, with the substantially uniform layer of silicon nitride, is subjected to a silicon oxidation environment with sidewalls in the plane being oxidized at a higher rate than sidewalls in the plane producing silicon dioxide on the silicon nitride layer having thickness over the plane greater than over the plane. The silicon dioxide is subjected to an etch to selectively remove silicon dioxide while leaving substantially un-etched silicon nitride to thereby remove portions of the silicon dioxide over the plane and to thereby expose underlying portions of the silicon nitride material while leaving portions of the silicon dioxide over the plane on underlying portions of the silicon nitride material. Exposed portions of the silicon nitride material are selectively removed to expose underlying portions of the sidewalls of the trench disposed in the plane while leaving substantially un-etched portions of the silicon nitride material disposed on sidewalls of the trench disposed in the plane. The structure is then subjected to an silicon oxidation environment to produce the substantially uniform silicon dioxide layer on the sidewalls of the trench.
    • 一种用于在独立于轴的硅体上形成基本上均匀的厚的,热生长的二氧化硅材料的方法。 沟槽形成在硅体的表面中,这种沟槽具有设置在不同结晶平面内的侧壁,其中一个这样的平面是<100>结晶平面,另外一个这样的平面是<110>平面。 在侧壁上形成基本均匀的氮化硅层。 具有基本上均匀的氮化硅层的沟槽经受硅氧化环境,其中<110>面中的侧壁以比在100平面中的侧壁更高的速率被氧化,在氮化硅层上产生二氧化硅, 厚度大于<100>平面上的厚度。 对二氧化硅进行蚀刻以选择性地去除二氧化硅,同时留下基本未蚀刻的氮化硅,从而在<100>平面上除去二氧化硅的一部分,从而暴露氮化硅材料的下面部分,同时留下部分 在氮化硅材料的下面部分上的<110>面上的二氧化硅。 选择性地去除氮化硅材料的暴露部分以暴露设置在<100>平面中的沟槽的侧壁的下面部分,同时留下设置在设置在<110>平面中的沟槽的侧壁上的氮化硅材料的基本上未蚀刻的部分 >飞机。 然后将该结构进行硅氧化环境以在沟槽的侧壁上产生基本均匀的二氧化硅层。
    • 7. 发明授权
    • Reduction of orientation dependent oxidation for vertical sidewalls of semiconductor substrates
    • 减少半导体衬底的垂直侧壁的取向依赖氧化
    • US06362040B1
    • 2002-03-26
    • US09501502
    • 2000-02-09
    • Helmut Horst TewsBrian S. LeeUlrike GrueningRaj JammyJohn Faltermeier
    • Helmut Horst TewsBrian S. LeeUlrike GrueningRaj JammyJohn Faltermeier
    • H01L218242
    • H01L27/10864H01L21/02238H01L21/02255H01L21/02299H01L21/31662H01L27/10876
    • A method for growing a dielectric layer on a substrate, in accordance with the present invention, includes the steps of providing a substrate having at least two crystallographic planes which experience different dielectric layer growth rates due to the at least two crystallographic planes. A first dielectric layer is grown on the at least two crystallographic planes such that the first dielectric layer has a first thickness on a first crystallographic plane and a second thickness on a second crystallographic plane. The first thickness is thicker than the second thickness for the first dielectric layer. Dopants are implanted through the first dielectric layer. A greater number of dopants are implanted in the substrate through the second thickness than through the first thickness of the first dielectric layer. The first dielectric layer is then removed. A second dielectric layer is grown at a same location as the removed first dielectric layer. The second dielectric layer has a first thickness on a first crystallographic plane and a second thickness on a second crystallographic plane. The first thickness and the second thickness of the second dielectric layer are closer in thickness than the first thickness and the second thickness of the first dielectric layer due to the implantation of the dopants.
    • 根据本发明的用于在衬底上生长电介质层的方法包括以下步骤:提供具有至少两个结晶面的衬底,所述晶体面由于至少两个晶面而具有不同的介电层生长速率。 在至少两个晶面上生长第一介电层,使得第一介电层在第一结晶平面上具有第一厚度,在第二结晶平面上具有第二厚度。 第一厚度比第一电介质层的第二厚度厚。 通过第一介电层注入掺杂剂。 通过第二厚度将更多数量的掺杂剂注入到衬底中,而不是通过第一介电层的第一厚度。 然后去除第一介电层。 在与去除的第一介电层相同的位置处生长第二介电层。 第二电介质层在第一结晶平面上具有第一厚度,在第二结晶平面上具有第二厚度。 由于掺杂剂的注入,第二介电层的第一厚度和第二厚度比第一厚度和第一介电层的第二厚度更厚。