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    • 62. 发明授权
    • Forming dual gate oxide thickness on vertical transistors by ion implantation
    • 通过离子注入在垂直晶体管上形成双栅氧化层厚度
    • US06610575B1
    • 2003-08-26
    • US10161818
    • 2002-06-04
    • Chew-Hoe AngEng-Hua LimCher-Liang ChaJia-Zhen ZhengElgin QuekMei-Sheng ZhouDaniel Yen
    • Chew-Hoe AngEng-Hua LimCher-Liang ChaJia-Zhen ZhengElgin QuekMei-Sheng ZhouDaniel Yen
    • H01L218234
    • H01L21/823857H01L21/823885
    • A method of structures having dual gate oxide thicknesses, comprising the following steps. A substrate having first and second pillars is provided. The first and second pillars each having an outer side wall and an inner side wall. At least one of the outer or inner side walls of at least one of the first and second pillars is/are masked leaving at least one of the outer or inner side walls of at least one of the first and second pillars exposed. Dopants are then implanted through the at least one of the exposed outer or inner side walls modifying the surface of the at least one of the doped exposed outer or inner side walls. The at least one of the masked outer or inner side walls of at least one of the first and second pillars is/are unmasked. Gate oxide is grown on the outer side walls and the inner side walls of the first and second pillars wherein the gate oxide grown upon the modified surfaces of the at least one of the doped outer or inner side walls is thicker than the gate oxide grown upon the non-modified surfaces of the at least one of the non-doped outer or inner side walls.
    • 一种具有双栅极氧化物厚度的结构的方法,包括以下步骤。 提供具有第一和第二柱的衬底。 第一和第二支柱各自具有外侧壁和内侧壁。 至少一个第一和第二支柱的外侧壁或内侧壁中的至少一个被遮蔽,留下第一和第二柱中的至少一个的至少一个外壁或内侧壁暴露。 然后通过暴露的外侧壁或内侧壁中的至少一个植入掺杂剂,改变掺杂的暴露的外壁或内侧壁中的至少一个的表面。 第一和第二支柱中的至少一个的被掩蔽的外侧壁或内侧壁中的至少一个被遮蔽。 栅极氧化物生长在第一和第二柱的外侧壁和内侧壁上,其中生长在掺杂的外壁或内侧壁中的至少一个的改性表面上的栅极氧化物比生长在栅极氧化物上的栅极氧化物厚 所述非掺杂外侧壁或内侧壁中的至少一个的未修饰表面。
    • 63. 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。
    • 64. 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。