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    • 1. 发明授权
    • Method of forming junction-leakage free metal salicide in a semiconductor wafer with ultra-low silicon consumption
    • 在具有超低硅消耗的半导体晶片中形成结漏电的金属硅化物的方法
    • US06383906B1
    • 2002-05-07
    • US09641436
    • 2000-08-18
    • Karsten WieczorekNicholas KeplerPaul R. BesserLarry Y. Wang
    • Karsten WieczorekNicholas KeplerPaul R. BesserLarry Y. Wang
    • H01L214763
    • H01L29/6653H01L21/28518H01L29/665H01L29/6656H01L29/6659
    • A method for forming ultra shallow junctions in a semiconductor wafer uses disposable spacers and a silicon cap layer to achieve ultra-low low silicon consumption during a salicide formation process. A refractory metal layer, such as a cobalt layer, is deposited over the gate and source/drain junctions of a semiconductor device. Silicon nitride disposable spacers are formed over the metal layer in the region of the sidewall spacers previously formed on the sidewalls of the gate. A silicon cap layer is deposited over the metal layer and the disposable spacers. Rapid thermal annealing is performed to form the high-ohmic phase of the salicide, with the disposable spacers preventing interaction and between the cobalt and the silicon in the area between the gate and the source/drain junctions along the sidewall spacers. The silicon cap layer provides a source of silicon for consumption during the first phase of salicide formation, reducing the amount of silicon of the source/drain junctions that is consumed.
    • 在半导体晶片中形成超浅结的方法使用一次性间隔物和硅帽层,以在自对准硅化物形成过程中实现超低的低硅消耗。 难熔金属层,例如钴层,沉积在半导体器件的栅极和源极/漏极结上。 氮化硅一次性间隔物形成在预先形成在栅极的侧壁上的侧壁间隔区域中的金属层的上方。 在金属层和一次性间隔物上沉积硅覆盖层。 进行快速热退火以形成硅化物的高欧姆相,其中一次性间隔物防止了沿着侧壁间隔物的栅极和源极/漏极结之间的区域中的钴和硅之间的相互作用。 硅封层在硅化物形成的第一阶段期间提供硅消耗源,从而减少消耗的源极/漏极结的硅量。
    • 2. 发明授权
    • Flash memory device and fabrication method having a high coupling ratio
    • 具有高耦合比的闪存器件和制造方法
    • US06323516B1
    • 2001-11-27
    • US09390052
    • 1999-09-03
    • Larry Y. WangSteven K. Park
    • Larry Y. WangSteven K. Park
    • H01L29788
    • H01L29/42324
    • Embodiments of the invention comprise a new device and technique to realize an improved coupling ratio integrated circuit device. This improvement is achieved by increasing an overlap portion between the first and second polysilicon layers, so as to increase the effective coupling ratio between the layers. In the embodiments of the present invention, a relatively tall or large portion of oxide is formed over at least a portion of each of a plurality of shallow trench isolation regions. This oxide is then utilized to provide a larger first polysilicon layer surface area, but without substantially increasing the tunnel oxide layer surface area. Then, a dielectric interlayer is formed upon the surface of the first polysilicon layer, and next, a second polysilicon layer is formed upon the dielectric interlayer. This increased overlap portion thus allows for an increased coupling ratio. Further, the coupling ratio may be tailored by adjusting either or both of the first and second polysilicon layer surface areas without requiring a substantial change in the tunnel oxide layer surface area.
    • 本发明的实施例包括实现改进的耦合比集成电路器件的新器件和技术。 这种改进通过增加第一和第二多晶硅层之间的重叠部分来实现,以便增加层之间的有效耦合比。 在本发明的实施例中,在多个浅沟槽隔离区域的每一个的至少一部分上形成相当高或较大部分的氧化物。 然后利用该氧化物提供较大的第一多晶硅层表面积,但基本不增加隧道氧化物层的表面积。 然后,在第一多晶硅层的表面上形成电介质中间层,接着在电介质中间层上形成第二多晶硅层。 这种增加的重叠部分因此允许增加耦合比。 此外,可以通过调整第一和第二多晶硅层表面区域中的一个或两个而不需要隧道氧化物层表面积的实质变化来调整耦合比。