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    • 2. 发明授权
    • Process for simultaneous formation of silicide-based self-aligned
contacts and local interconnects
    • 用于同时形成基于硅化物的自对准触点和局部互连的工艺
    • US5668065A
    • 1997-09-16
    • US690972
    • 1996-08-01
    • Chen-Hsi Lin
    • Chen-Hsi Lin
    • H01L21/60H01L21/768H01L21/283H01L21/335
    • H01L21/76897H01L21/76889H01L21/76895
    • A process for simultaneously forming a self-aligned contact, a local interconnect and a self-aligned silicide in a semiconductor device. An oxide layer is deposited over a gate structure, a source region and a drain region formed on a substrate of the semiconductor device. The gate structure may be a multi-layer structure including a polysilicon gate, a silicon nitride layer and a tungsten silicide layer. The oxide layer deposited over the gate, source and drain is etched to define portions of the oxide layer which will form contact areas of a self-aligned contact and a local interconnect of the semiconductor device. An amorphous silicon layer is then deposited over the etched oxide layer to a thickness selected such that substantially the entire thickness of remaining portions of the amorphous silicon layer will be consumed during a subsequent silicidation reaction. The amorphous silicon layer is etched to remove portions of the amorphous silicon layer which will not be used to form a portion of the self-aligned contact and local interconnect, as well as remaining non-contact area portions of the underlying oxide layer. A metal layer is deposited over the etched amorphous silicon layer, and an annealing process is applied such that the etched amorphous silicon layer and the deposited metal layer react to provide a silicide layer which forms a portion of the self-aligned contact and the local interconnect. The annealing process also causes the deposited metal layer to react with exposed source and/or drain regions to thereby form a self-aligned silicide.
    • 一种在半导体器件中同时形成自对准接触,局部互连和自对准硅化物的方法。 氧化物层沉积在形成在半导体器件的衬底上的栅极结构,源极区和漏极区上。 栅极结构可以是包括多晶硅栅极,氮化硅层和硅化钨层的多层结构。 蚀刻沉积在栅极,源极和漏极上的氧化物层以限定氧化物层的部分,其将形成半导体器件的自对准接触和局部互连的接触区域。 然后将非晶硅层沉积在蚀刻的氧化物层上,以选择厚度,使得在随后的硅化反应期间,非晶硅层的剩余部分的整个厚度将被消耗。 蚀刻非晶硅层以去除不用于形成自对准接触和局部互连的一部分的部分,以及下面的氧化物层的剩余非接触区域部分。 在蚀刻的非晶硅层上沉积金属层,并且施加退火处理,使得蚀刻的非晶硅层和沉积的金属层反应以提供形成自对准接触的一部分的硅化物层和局部互连 。 退火工艺还使沉积的金属层与暴露的源极和/或漏极区域反应,从而形成自对准的硅化物。
    • 3. 发明授权
    • Method of separately fabricating a base/emitter structure of a BiCMOS
device
    • 分别制造BiCMOS器件的基极/发射极结构的方法
    • US5158900A
    • 1992-10-27
    • US779448
    • 1991-10-18
    • Chi-Kwan LauDonald L. PackwoodChen-Hsi LinAshor Kapoor
    • Chi-Kwan LauDonald L. PackwoodChen-Hsi LinAshor Kapoor
    • H01L27/06H01L21/8249
    • H01L21/8249
    • A method of fabricating a BiCMOS device in which PMOS and NMOS transistors are formed prior to a base/emitter structure of a bipolar transistor. In forming the base/emitter structure, a blanket implant of a first impurity is introduced into a base region of a semiconductor substrate. An insulating layer is deposited and then patterned to expose a portion of the base region at an emitter window. A polysilicon layer is deposited on the insulating layer and into the emitter window. The polysilicon layer is patterned to provide the desired configuration at the emitter window, whereafter the remaining polysilicon acts as a mask for etching of the insulating layer. Thus, etching of the insulating layer is performed in a self-aligning manner. Self-alignment is also utilized in providing a base-link region and in providing a silicide layer.
    • 一种制造BiCMOS器件的方法,其中在双极晶体管的基极/发射极结构之前形成PMOS和NMOS晶体管。 在形成基极/发射极结构时,将第一杂质的覆盖注入引入到半导体衬底的基极区域中。 沉积绝缘层,然后将其图案化以在发射器窗口处暴露基部区域的一部分。 多晶硅层沉积在绝缘层上并进入发射极窗口。 图案化多晶硅层以在发射极窗口处提供期望的配置,此后剩余的多晶硅用作蚀刻绝缘层的掩模。 因此,以自对准的方式进行绝缘层的蚀刻。 自对准也用于提供基极连接区域和提供硅化物层。
    • 5. 发明授权
    • Method for formation of a buried layer for a semiconductor device
    • 用于形成半导体器件的掩埋层的方法
    • US5476800A
    • 1995-12-19
    • US189353
    • 1994-01-31
    • Gregory N. BurtonChen-Hsi LinChi-Kwan Lau
    • Gregory N. BurtonChen-Hsi LinChi-Kwan Lau
    • H01L21/74H01L21/265
    • H01L21/74
    • The present invention provides a buried layer fabrication sequence suitable for bipolar and BiCMOS applications. The buried layer fabrication sequence for forming a buried layer having a first conductivity type includes the steps of: forming a first dielectric layer on a semiconductor substrate, the semiconductor substrate having a second conductivity type; forming a first mask layer having openings on top of the first dielectric layer, wherein the openings in the first mask layer are positioned over the regions where the first buried layer is formed; exposing the semiconductor substrate in the regions where openings in the first mask layer are formed; forming a second dielectric layer; removing the second dielectric layer; and forming a semiconductor layer.
    • 本发明提供了适用于双极和BiCMOS应用的掩埋层制造序列。 用于形成具有第一导电类型的掩埋层的掩埋层制造顺序包括以下步骤:在半导体衬底上形成第一电介质层,所述半导体衬底具有第二导电类型; 在所述第一介电层的顶部上形成具有开口的第一掩模层,其中所述第一掩模层中的所述开口位于形成有所述第一掩埋层的区域上; 在形成第一掩模层中的开口的区域中暴露半导体衬底; 形成第二电介质层; 去除所述第二电介质层; 并形成半导体层。