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    • 6. 发明授权
    • Method of forming a charge storage electrode having a selective hemispherical grains silicon film in a semiconductor device
    • 在半导体器件中形成具有选择性半球状晶粒硅膜的电荷存储电极的方法
    • US06200877B1
    • 2001-03-13
    • US09294348
    • 1999-04-20
    • Kwang Seok JeonJung Yun MunHoon Jung OhSang Ho WooSeung Woo ShinIl Keoun HanHong Seon Yang
    • Kwang Seok JeonJung Yun MunHoon Jung OhSang Ho WooSeung Woo ShinIl Keoun HanHong Seon Yang
    • H01L2120
    • H01L28/84H01L27/10852
    • The present invention relates to semiconductor manufacturing field, more particularly, to a process of forming a charge storage electrode to which a selective hemispherical grains (HSG) silicon film is applied. The object of the present invention is to provide a method of forming a charge storage electrode having the selective HSG silicon film in semiconductor device which can secure a sufficient capacitor effective surface area by obtaining desired grain size at the time of selective HSG silicon film formation. The present invention prevents remaining of carbon component which obstructs the growth of HSG silicon film after dry etching process by limiting the carbon halide gas used in dry etching process of amorphous silicon film for defining the charge storage electrode at the time of process of forming the charge storage electrode having selective HSG silicon film. That is, the present invention is a technology of etching a part of amorphous silicon film by using general carbon halide gas at the time of dry etching process of the amorphous silicon film for defining the charge storage electrode, and then, finally etching the remaining part of amorphous silicon film by using silicon etching gas such as SF6 gas, Cl2+O2 gas, HBr gas, etc. not containing carbon component or only using the etching gas such as SF6 gas, Cl2+O2 gas, HBr gas, etc. not containing carbon component during selective etching of amorphous silicon film.
    • 本发明涉及半导体制造领域,更具体地说,涉及形成选择性半球状晶粒(HSG)硅膜的电荷存储电极的工艺。 本发明的目的是提供一种在半导体器件中形成具有选择性HSG硅膜的电荷存储电极的方法,其可以通过在选择性HSG硅膜形成时获得所需的晶粒尺寸来确保足够的电容器有效表面积。 本发明通过限制在形成电荷的过程中用于限定电荷存储电极的非晶硅膜的干法蚀刻工艺中使用的卤化碳气体来防止在干法蚀刻工艺之后妨碍HSG硅膜生长的碳成分残留 存储电极具有选择性HSG硅膜。 也就是说,本发明是通过在用于限定电荷存储电极的非晶硅膜的干蚀刻工艺时使用一般的卤化物气体来蚀刻非晶硅膜的一部分的技术,然后最后蚀刻其余部分 通过使用不含碳成分的SF6气体,Cl2 + O2气体,HBr气体等硅蚀刻气体,或者仅使用诸如SF 6气体,Cl 2 + O 2气体,HBr气体等蚀刻气体的非晶硅膜, 在非晶硅膜的选择性蚀刻期间含有碳成分。
    • 8. 发明授权
    • Method of manufacturing a semiconductor memory device
    • 制造半导体存储器件的方法
    • US06716701B1
    • 2004-04-06
    • US10601870
    • 2003-06-24
    • Noh Yeal KwakHong Seon Yang
    • Noh Yeal KwakHong Seon Yang
    • H01L218247
    • H01L27/11526H01L27/11534H01L29/66825
    • Disclosed is a method of manufacturing a semiconductor memory device. An ion implantation layer is formed into a given depth of the semiconductor substrate. Therefore, it is possible to prevent the dopant (P31) gettered on the surface of the semiconductor substrate from being diffused toward the bottom when a well ion is injected. The dopant (P31) gettered on the surface of the semiconductor substrate is easily experienced by transit-enhanced diffusion even at low temperature. Also, the dopant may serve as counter dopping in the buried channel. In the present invention, as the behavior of this dopant (P31) is prohibited in a subsequent annealing process, the concentration of the ion for controlling the threshold voltage could be uniformly kept. Therefore, the present invention can manufacture devices of high reliability having a stable threshold voltage characteristic and can be flexibly applied to manufacturing the devices depending on reduction in the design rule.
    • 公开了半导体存储器件的制造方法。 离子注入层形成为半导体衬底的给定深度。 因此,当注入阱离子时,可以防止在半导体衬底的表面上吸收的掺杂物(P31)向底部扩散。 在半导体衬底的表面上吸收的掺杂剂(P31)即使在低温也容易受到传输增强扩散的影响。 此外,掺杂剂可以用作掩埋沟道中的反掺杂。 在本发明中,由于在随后的退火工艺中禁止该掺杂剂(P31)的行为,因此可以均匀地保持用于控制阈值电压的离子的浓度。 因此,本发明可以制造具有稳定的阈值电压特性的高可靠性的器件,并且可以灵活地应用于根据设计规则的减少来制造器件。