Integrated circuit with multiple gate dielectric structures
    2.
    发明授权
    Integrated circuit with multiple gate dielectric structures 有权
    具有多栅绝缘结构的集成电路

    公开(公告)号:US06597046B1

    公开(公告)日:2003-07-22

    申请号:US09378053

    申请日:1999-08-20

    IPC分类号: H01L2976

    CPC分类号: H01L21/823462

    摘要: An integrated circuit includes insulated gate field effect transistors (IGFETs), having gate dielectric layers wherein a nitrogen concentration in the gate dielectric varies between a first concentration at the gate electrode/gate dielectric interface and a second concentration at the gate dielectric/substrate interface. In one embodiment the gate dielectric is an oxynitride formed by an N2 plasma; and the oxynitride has top surface nitrogen concentration that is higher than a bottom surface nitrogen concentration. In a further aspect of the present invention, an integrated circuit includes a plurality of IGFETs, wherein various ones of the plurality of IGFETs have different gate dielectric thicknesses and compositions. A method of forming IGFETs with different gate dielectric thicknesses and compositions, on a single integrated circuit, includes forming a first oxynitride layer, forming a masking layer, removing a portion of the first oxynitride layer, forming an oxide layer where the oxynitride was removed, and forming a plurality of gate electrodes, a first portion of the gate electrodes overlying the first oxynitride layer.

    摘要翻译: 集成电路包括绝缘栅场效应晶体管(IGFET),其具有栅极电介质层,其中栅极电介质中的氮浓度在栅极电极/栅极电介质界面处的第一浓度与栅极电介质/衬底界面处的第二浓度之间变化。 在一个实施例中,栅极电介质是由N 2等离子体形成的氧氮化物; 氮氧化物的顶表面氮浓度高于底面氮浓度。 在本发明的另一方面,集成电路包括多个IGFET,其中多个IGFET中的各种具有不同的栅介质厚度和组成。 在单个集成电路上形成具有不同栅电介质厚度和组成的IGFET的方法包括形成第一氧氮化物层,形成掩模层,去除第一氮氧化物层的一部分,形成除去氧氮化物的氧化物层, 以及形成多个栅电极,所述栅电极的覆盖所述第一氧氮化物层的第一部分。

    Thin oxides of silicon
    3.
    发明授权
    Thin oxides of silicon 失效
    硅的薄氧化物

    公开(公告)号:US06221789B1

    公开(公告)日:2001-04-24

    申请号:US09124562

    申请日:1998-07-29

    IPC分类号: H01L21469

    摘要: An oxidation process that produces multi-layer, yet very thin oxides of silicon, formed on silicon substrates, includes pushing wafers at a particular range of speeds, into a furnace at a particular range of temperatures, sequentially oxidizing the wafers in varying chemical ambients, and operating an external chlorine compound generator coupled to the furnace. Oxides formed in this manner have good uniformity and low interface state density and are suitable for forming FETs. In a particular embodiment, a first portion of an oxide stack is formed in an oxygen/nitrogen ambient, a second portion of an oxide stack is formed in a carbon dioxide/hydrogen chloride/oxygen ambient, and a third portion of an oxide stack is formed by a wet oxidation. The second portion of the oxide stack is formed when 1,2-dichloroethylene is treated with heat and oxygen to produce carbon dioxide and hydrogen chloride gas that is then introduced into the furnace.

    摘要翻译: 在硅衬底上形成多层但非常薄的硅氧化物的氧化工艺包括将晶片以特定的速度推入特定温度范围内的炉中,在不同的化学环境中依次氧化晶片, 并操作耦合到炉的外部氯化合物发生器。 以这种方式形成的氧化物具有良好的均匀性和低界面态密度,并且适于形成FET。在一个具体实施方案中,在氧/氮环境中形成氧化物堆叠的第一部分,形成氧化物堆叠的第二部分 在二氧化碳/氯化氢/氧气环境中,并且氧化物堆叠的第三部分通过湿氧化形成。 当用热和氧处理1,2-二氯乙烯时,形成氧化物堆叠的第二部分,以产生二氧化碳和氯化氢气体,然后将其引入炉中。

    Advanced trench sidewall oxide for shallow trench technology
    4.
    发明授权
    Advanced trench sidewall oxide for shallow trench technology 有权
    先进的沟槽侧壁氧化物用于浅沟槽技术

    公开(公告)号:US6153480A

    公开(公告)日:2000-11-28

    申请号:US164112

    申请日:1998-09-30

    CPC分类号: H01L21/76235

    摘要: A method of forming an isolation structure in a semiconductor substrate is described. A trench is first etched into a semiconductor substrate. The trench is subjected to a nitrogen-oxide gas ambient and is annealed to form a silicon-oxynitride surface along the trench sidewalls. A first oxide layer is then formed within the trench. The first oxide layer is subjected to a nitridation step and is annealed to form an oxy-nitride surface on the first oxide layer and a silicon-oxynitride interface between the first oxide layer and the semiconductor substrate. A second oxide layer is then deposited over the oxy-nitride surface of the first oxide layer. The method and isolation structure of the present invention reduce dopant outdiffusion, reduce trench stresses, allow more uniform growth of thin gate oxides, and permit the use of thinner gate oxides.

    摘要翻译: 描述在半导体衬底中形成隔离结构的方法。 首先将沟槽蚀刻到半导体衬底中。 将沟槽经受氮氧化物气体环境并退火以形成沿沟槽侧壁的氧氮化硅表面。 然后在沟槽内形成第一氧化物层。 对第一氧化物层进行氮化步骤,并在第一氧化物层和第一氧化物层与半导体衬底之间的氧氮化物界面上进行退火以形成氧氮化物表面。 然后将第二氧化物层沉积在第一氧化物层的氧化氮化物表面上。 本发明的方法和隔离结构减少掺杂剂扩散,减小沟槽应力,允许薄栅氧化物的更均匀生长,并允许使用更薄的栅极氧化物。

    N2O nitrided-oxide trench sidewalls to prevent boron outdiffusion and decrease stress
    6.
    发明授权
    N2O nitrided-oxide trench sidewalls to prevent boron outdiffusion and decrease stress 失效
    N2O氮化氧化物沟槽侧壁,以防止硼扩散并减少应力

    公开(公告)号:US06566727B1

    公开(公告)日:2003-05-20

    申请号:US09433541

    申请日:1999-11-03

    IPC分类号: H01L2500

    CPC分类号: H01L21/31053 H01L21/76235

    摘要: A method of forming an isolation structure in a semiconductor substrate is described. A trench is first etched into a semiconductor substrate. A first oxide layer is then formed with the trench. The first oxide layer is subjected to a nitrogen-oxide gas ambient and is annealed to form an oxy-nitride surface on the first oxide layer and a silicon-oxynitride interface between the first oxide layer and the semiconductor substrate. A second oxide layer is then deposited over the oxy-nitride surface of the first oxide layer. The method and isolation structure of the present invention prevents dopant outdiffusion, reduces trench stresses, allows more uniform growth of thin gate oxides, and permits the use of thinner gate oxides.

    摘要翻译: 描述在半导体衬底中形成隔离结构的方法。 首先将沟槽蚀刻到半导体衬底中。 然后用沟槽形成第一氧化物层。 对第一氧化物层进行氮氧化物气氛环境的退火处理,以在第一氧化物层上形成氧氮化物表面,在第一氧化物层和半导体衬底之间形成氮氧化硅界面。 然后将第二氧化物层沉积在第一氧化物层的氧化氮化物表面上。 本发明的方法和隔离结构防止掺杂剂扩散,减小沟槽应力,允许薄栅极氧化物的更均匀生长,并允许使用更薄的栅极氧化物。

    N.sub.2 O nitrided-oxide trench sidewalls and method of making isolation
structure
    7.
    发明授权
    N.sub.2 O nitrided-oxide trench sidewalls and method of making isolation structure 失效
    N2O氮化氧化物沟槽侧壁和隔离结构的制备方法

    公开(公告)号:US5780346A

    公开(公告)日:1998-07-14

    申请号:US775571

    申请日:1996-12-31

    CPC分类号: H01L21/31053 H01L21/76235

    摘要: A method of forming an isolation structure in a semiconductor substrate is described. A trench is first etched into a semiconductor substrate. A first oxide layer is then formed with the trench. The first oxide layer is subjected to a nitrogen-oxide gas ambient and is annealed to form an oxy-nitride surface on the first oxide layer and a silicon-oxynitride interface between the first oxide layer and the semiconductor substrate. A second oxide layer is then deposited over the oxy-nitride surface of the first oxide layer. The method and isolation structure of the present invention prevents dopant outdiffusion, reduces trench stresses, allows more uniform growth of thin gate oxides, and permits the use of thinner gate oxides.

    摘要翻译: 描述在半导体衬底中形成隔离结构的方法。 首先将沟槽蚀刻到半导体衬底中。 然后用沟槽形成第一氧化物层。 对第一氧化物层进行氮氧化物气氛环境的退火处理,以在第一氧化物层上形成氧氮化物表面,在第一氧化物层和半导体衬底之间形成氮氧化硅界面。 然后将第二氧化物层沉积在第一氧化物层的氧化氮化物表面上。 本发明的方法和隔离结构防止掺杂剂扩散,减小沟槽应力,允许薄栅极氧化物的更均匀生长,并允许使用更薄的栅极氧化物。

    N2O Nitrided-oxide trench sidewalls to prevent boron outdiffusion and decrease stress
    10.
    发明授权
    N2O Nitrided-oxide trench sidewalls to prevent boron outdiffusion and decrease stress 失效
    N2O氮化氧化物沟槽侧壁,以防止硼扩散并减少应力

    公开(公告)号:US06261925B1

    公开(公告)日:2001-07-17

    申请号:US09075490

    申请日:1998-05-08

    IPC分类号: H01L21762

    CPC分类号: H01L21/31053 H01L21/76235

    摘要: A method of forming an isolation structure in a semiconductor substrate is described. A trench is first etched into a semiconductor substrate. A first oxide layer is then formed with the trench. The first oxide layer is subjected to a nitrogen-oxide gas ambient and is annealed to form an oxy-nitride surface on the first oxide layer and a silicon-oxynitride interface between the first oxide layer and the semiconductor substrate. A second oxide layer is then deposited over the oxy-nitride surface of the first oxide layer. The method and isolation structure of the present invention prevents dopant outdiffusion, reduces trench stresses, allows more uniform growth of thin gate oxides, and permits the use of thinner gate oxides.

    摘要翻译: 描述在半导体衬底中形成隔离结构的方法。 首先将沟槽蚀刻到半导体衬底中。 然后用沟槽形成第一氧化物层。 对第一氧化物层进行氮氧化物气氛环境的退火处理,以在第一氧化物层上形成氧氮化物表面,在第一氧化物层和半导体衬底之间形成氮氧化硅界面。 然后将第二氧化物层沉积在第一氧化物层的氧化氮化物表面上。 本发明的方法和隔离结构防止掺杂剂扩散,减小沟槽应力,允许薄栅极氧化物的更均匀生长,并允许使用更薄的栅极氧化物。