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    • 42. 发明授权
    • Double-gated silicon-on-insulator (SOI) transistors with corner rounding
    • 双栅绝缘体(SOI)晶体管,带圆角
    • US07141854B2
    • 2006-11-28
    • US11174857
    • 2005-07-05
    • Yong Meng LeeDa JinDavid Vigar
    • Yong Meng LeeDa JinDavid Vigar
    • H01L27/01H01L27/12H01L31/0392H01L23/62
    • H01L29/785H01L29/42384H01L29/42392H01L29/66772H01L29/7854H01L29/78648H01L2924/0002H01L2924/00
    • A method of forming a double-gated transistor having a rounded active region to improve GOI and leakage current control comprises the following steps, inter alia. An SOI substrate is patterned and a rounded oxide layer is formed over the exposed side walls of a patterned upper SOI silicon layer. A dummy layer, having an opening defining a gate, is formed over the exposed patterned top oxide layer and the exposed portions of the upper SOI silicon layer. An undercut is formed into the undercut lower SOI oxide layer and the exposed gate area portion of the oxide layer is removed. The portion of the rounded oxide layer within the gate area is removed and a conformal oxide layer is formed over a part of the structure. A gate is formed within the second patterned dummy layer opening and the patterned dummy layer is removed to form the double gated transistor.
    • 形成具有圆形有源区域以提高GOI和漏电流控制的双门控晶体管的方法尤其包括以下步骤。 图案化SOI衬底,并且在图案化的上SOI硅层的暴露侧壁上形成圆形氧化物层。 在暴露的图案化的顶部氧化物层和上部SOI硅层的暴露部分之上形成具有限定栅极的开口的虚设层。 在底切下面的SOI氧化物层中形成底切,去除氧化物层的暴露的栅极区域部分。 去除栅极区域内的圆形氧化物层的部分,并且在该结构的一部分上形成共形氧化物层。 在第二图案化虚拟层开口内形成栅极,去除图案化虚拟层以形成双门控晶体管。
    • 43. 发明授权
    • Method to form self-aligned source/drain CMOS device on insulated staircase oxide
    • 在绝缘阶梯氧化物上形成自对准源极/漏极CMOS器件的方法
    • US06541327B1
    • 2003-04-01
    • US09760123
    • 2001-01-16
    • Lap ChanElgin QuekRavi SundaresanYang PanJames Yong Meng LeeYing Keung LeungYelehanka Ramachandramurthy PradeepJia Zhen Zheng
    • Lap ChanElgin QuekRavi SundaresanYang PanJames Yong Meng LeeYing Keung LeungYelehanka Ramachandramurthy PradeepJia Zhen Zheng
    • H01L218238
    • H01L29/66492H01L21/823814H01L29/41783H01L29/665H01L29/66575
    • A method to form elevated source/drain (S/D) over staircase shaped openings in insulating layers. A gate structure is formed over a substrate. The gate structure is preferably comprised of a gate dielectric layer, gate electrode, first spacers, and hard mask. A first insulating layer is formed over the substrate and the gate structure. A resist layer is formed having an opening over the gate structure and over a lateral area adjacent to the gate structure. We etch the insulating layer through the opening in the resist layer. The etching removes a first thickness of the insulating layer to form a source/drain (S/D) opening. We remove the first spacers and hardmask to form a source/drain (S/D) contact opening. We implant ions into the substrate through the source/drain (S/D) contact opening to form lightly doped drain regions. We form second spacers on the sidewalls of the gate electrode and the gate dielectric and on the sidewalls of the insulating layer in the source/drain (S/D) contact opening and the source/drain (S/D) opening. A conductive layer is deposited over the gate electrode, the insulating layer. The conductive layer is planarized to exposed the insulating layer to form elevated source/drain (S/D) blocks on a staircase shape insulating layer.
    • 一种在绝缘层中的阶梯形开口形成升高的源极/漏极(S / D)的方法。 栅极结构形成在衬底上。 栅极结构优选由栅极电介质层,栅电极,第一间隔物和硬掩模组成。 在衬底和栅极结构之上形成第一绝缘层。 形成抗蚀剂层,其具有在栅极结构上方的开口以及与栅极结构相邻的横向区域。 我们通过抗蚀剂层中的开口蚀刻绝缘层。 蚀刻去除绝缘层的第一厚度以形成源极/漏极(S / D)开口。 我们移除第一个垫片和硬掩模以形成一个源极/漏极(S / D)接触开口。 我们通过源极/漏极(S / D)接触开口将离子注入到衬底中,以形成轻掺杂的漏极区。 我们在源极/漏极(S / D)接触开口和源极/漏极(S / D)开口中的栅电极和栅极电介质的侧壁和绝缘层的侧壁上形成第二间隔物。 在栅电极,绝缘层上沉积导电层。 导电层被平坦化以暴露绝缘层,以在阶梯形绝缘层上形成升高的源极/漏极(S / D)块。
    • 44. 发明授权
    • Method to control the channel length of a vertical transistor by first forming channel using selective epi and source/drain using implantation
    • 通过使用选择性外延和使用注入的源极/漏极首先形成沟道来控制垂直晶体管的沟道长度的方法
    • US06436770B1
    • 2002-08-20
    • US09721720
    • 2000-11-27
    • Ying Keung LeungYelehanka Ramachandramurthy PradeepJia Zhen ZhengLap ChanElgin QuekRavi SundaresanYang PanJames Yong Meng Lee
    • Ying Keung LeungYelehanka Ramachandramurthy PradeepJia Zhen ZhengLap ChanElgin QuekRavi SundaresanYang PanJames Yong Meng Lee
    • H01L21332
    • H01L29/7827H01L29/42356H01L29/66666
    • A method for a vertical MOS transistor whose vertical channel width can be accurately defined and controlled. Isolation regions are formed in a substrate. The isolation regions defining an active area. Then, we form a source region in the active area. A dielectric layer is formed over the active area and the isolation regions. We form a barrier layer over the dielectric layer. We form an opening in the barrier layer. A gate layer is formed in the opening. We form an insulating layer over the conductive layer and the barrier layer. We form a gate opening through the insulating layer, the gate layer and the dielectric layer to expose the source region. Gate dielectric spacers are formed over the sidewalls of the gate layer. Then, we form a conductive plug filling the gate opening. The insulating layer is removed. We form a drain region in top and side portions of the conductive plug and form doped gate regions in the gate layer. The remaining portions of the conductive plug comprise a channel region. A channel length is between the top of the source region and the drain region. We form an interlevel dielectric layer over the barrier layer, the gate layer, and the conductive plug. Contacts are formed through the interlevel dielectric layer to the doped gate regions, the drain region and the source region.
    • 一种垂直MOS晶体管的方法,其垂直沟道宽度可以被精确地限定和控制。 在衬底中形成隔离区。 隔离区限定有效区域。 然后,我们在活动区域​​中形成一个源区域。 在有源区域和隔离区域上形成介电层。 我们在电介质层上形成阻挡层。 我们在屏障层形成一个开口。 在开口中形成栅极层。 我们在导电层和阻挡层上形成绝缘层。 我们通过绝缘层,栅极层和电介质层形成栅极开口以暴露源极区域。 栅极电介质隔离物形成在栅极层的侧壁上。 然后,我们形成一个填充门开口的导电塞。 绝缘层被去除。 我们在导电插塞的顶部和侧部形成漏极区,并在栅极层中形成掺杂的栅极区。 导电插塞的其余部分包括沟道区域。 沟道长度在源极区域的顶部和漏极区域之间。 我们在阻挡层,栅极层和导电插塞上形成层间电介质层。 通过层间介质层与掺杂栅极区,漏极区和源极区形成触点。
    • 45. 发明授权
    • Selective salicide process by reformation of silicon nitride sidewall spacers
    • 选择性的自对准硅化物工艺通过改造氮化硅侧壁间隔件
    • US06436754B1
    • 2002-08-20
    • US09863221
    • 2001-05-24
    • Yong Meng Lee
    • Yong Meng Lee
    • H01L218234
    • H01L27/11526H01L27/11543H01L29/665H01L29/66515H01L29/6659
    • A new method of forming selective salicide structures is described whereby robust salicide structures are formed on exposed logic FET's, while blocking salicide formation on memory FET's. Thus, yielding logic FET's with robust salicide structures which exhibit low sheet rho lines and contacts, while blocking salicide formation on the sensitive memory FET's which operate at low voltage and have low leakage, shallow junctions. A conformal layer of thick silicon nitride in conjunction with a salicide blockout mask forms robust selective salicide structures. These structures exhibit low leakage and lack leakage problems caused by bridging, silicide ribbons or stringers.
    • 描述了一种形成选择性自对准硅化物结构的新方法,其中在暴露的逻辑FET上形成稳固的自对准硅化物结构,同时阻挡存储器FET的自对准硅化物形成。 因此,产生具有强烈的自对准硅化物结构的逻辑FET,其表现出低的薄片rho线和触点,同时阻挡在低电压操作并且具有低泄漏,浅结的敏感存储器FET上的自对准硅化物形成。 与硅化物堵塞掩模结合的厚氮化硅的保形层形成鲁棒的选择性硅化物结构。 这些结构表现出低的泄漏和缺乏由桥接,硅化物带或桁条引起的泄漏问题。
    • 46. 发明授权
    • Selective formation of hydrogen rich PECVD silicon nitride for improved NMOS transistor performance
    • 选择性形成富氢PECVD氮化硅,以改善NMOS晶体管性能
    • US06372569B1
    • 2002-04-16
    • US09483035
    • 2000-01-18
    • Yong Meng LeeGao FengYunqzang ZhangRavi Sundaresan
    • Yong Meng LeeGao FengYunqzang ZhangRavi Sundaresan
    • H01L218238
    • H01L21/823814
    • A method of selective formation of SiN layer in a semiconductor device comprising the following steps. A semiconductor structure having at least one PMOS transistor and one NMOS transistor formed therein is provided. The PMOS and NMOS transistors each have source/drain regions, a gate, and salicide contact regions. An undoped silicate glass (USG) layer is deposited over the semiconductor structure and the PMOS and NMOS transistors. An H2-rich PECVD silicon nitride layer is deposited over the undoped silicate glass layer and over the PMOS and NMOS transistors. The H2-rich PECVD silicon nitride layer is patterned, etched, and removed from over the PMOS transistor. An inter-level dielectric (ILD) layer is formed over the structure. The ILD layer is densified whereby hydrogen diffuses from the H2-rich PECVD silicon nitride layer overlying the NMOS transistor into the source/drain of the NMOS transistor.
    • 一种在半导体器件中选择性地形成SiN层的方法,包括以下步骤。 提供具有形成在其中的至少一个PMOS晶体管和一个NMOS晶体管的半导体结构。 PMOS和NMOS晶体管各自具有源极/漏极区域,栅极和自对准硅化物接触区域。 在半导体结构和PMOS和NMOS晶体管上沉积未掺杂的硅酸盐玻璃(USG)层。 富含H 2 O的PECVD氮化硅层沉积在未掺杂的硅酸盐玻璃层上并在PMOS和NMOS晶体管之上。 从富于PMOS晶体管的图案化,蚀刻和去除富H2的PECVD氮化硅层。 在该结构上形成层间电介质(ILD)层。 ILD层被致密化,由此氢从NMOS晶体管上的富H 2 PECVD氮化硅层扩散到NMOS晶体管的源极/漏极。