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    • 1. 发明授权
    • Aluminum metallization method
    • 铝金属化方法
    • US5290731A
    • 1994-03-01
    • US848123
    • 1992-03-09
    • Yukiyasu SuganoShinji MinegishiKazuhide KoyamaHirofumi Sumi
    • Yukiyasu SuganoShinji MinegishiKazuhide KoyamaHirofumi Sumi
    • H01L21/28H01L21/3205H01L21/768H01L23/52H01L23/522H01L21/441
    • H01L21/76862H01L21/76843H01L21/76846H01L21/76855H01L21/76877
    • A metallization method for improving wettability and reactivity of a titanium (Ti) based barrier metal layer with respect to an aluminum (Al) based material and simultaneously achieving high barrier properties and superior step coverage, is proposed. An operation of increasing the crystal grain size of and planarizing at least a surface region of a barrier metal layer is effected simultaneously at the time of formation of a barrier metal layer. In this manner, Al migration characteristics and reactivity on a barrier metal surface are improved so that voids are not produced when an Al-based material layer is charged into small-sized connecting hole by a process sensitive to surface morphology, such as high temperature bias sputtering. By this technique, wettability of a material layer having distinctly inferior wettability with Al, while being excellent in barrier properties, such as a TiON layer, may be improved. As a smoothing operation, bias sputtering, laser irradiation and lamp annealing are proposed. Satisfactory results have been achieved on applying these to a Ti/TiON/Ti system, a Ti/TiON system or to a Ti/TiON/TiSi.sub.2 system.
    • 提出了一种用于改善钛(Ti)基阻挡金属层相对于铝(Al)基材料的润湿性和反应性的金属化方法,同时实现高阻挡性能和优异的台阶覆盖率。 在形成阻挡金属层时同时进行增加阻挡金属层的至少表面区域的晶粒尺寸和平坦化的操作。 以这种方式,改善了阻挡金属表面的Al迁移特性和反应性,使得当通过对表面形态敏感的方法将Al基材料层装入小尺寸连接孔时,不会产生空隙,例如高温偏差 溅射。 通过这种技术,可以提高具有优异的耐湿性的材料层与Al的润湿性,同时具有优异的阻隔性能,例如TiON层。 作为平滑化处理,提出偏置溅射,激光照射和灯退火。 在Ti / TiON / Ti体系,Ti / TiON体系或Ti / TiON / TiSi2体系中应用这些结果已经取得了令人满意的结果。
    • 3. 发明授权
    • Aluminum metallization method
    • 铝金属化方法
    • US5397744A
    • 1995-03-14
    • US283255
    • 1994-07-29
    • Hirofumi SumiYukiyasu Sugano
    • Hirofumi SumiYukiyasu Sugano
    • H01L21/285H01L21/768H01L21/283
    • H01L21/76859H01L21/28518H01L21/76838H01L21/76843H01L2924/0002Y10S148/019
    • A metallization method in which a fine interconnection hole is filled with an Al-based material and in which low resistance and excellent barrier properties may be achieved simultaneously, is proposed. The present invention resides in improvement in the barrier metal structure. (a) A stack of a TiSi.sub.2 layer and a Ti layer, formed by an modified SALICIDE method, and (b) a layer of a Ti-based material rendered amorphous are used. The TiSi.sub.2 layer is formed in a self-aligned manner by reacting the silicon substrate with the Ti layer by the interposition of e.g. a thin SiO.sub.2 layer and exhibits lower sheet resistance and dense film properties as well as excellent barriering properties. The Ti layer is stacked on the TiSi.sub.2 layer for improving wettability with respect to the layer of the Al-based material. The layer of the amorphous Ti-based material is formed by N.sub.2 ion implantation into the polycrystalline TiN layer and exhibits superior barrier properties because the crystal grain boundary functioning as the Al diffusion path is destructed. Both of these layers exhibit low sheet resistance as compared to the TiON layer used heretofore as a layer of a material exhibiting excellent barrier properties, while being superior in wettability with respect to the layer of the Al-based material, so that a highly reliable contact may be formed.
    • 提出了一种金属化方法,其中精细互连孔填充有Al基材料并且其中可以同时实现低电阻和优异的阻挡性能。 本发明在于阻挡金属结构的改进。 (a)使用通过改性的SALICIDE法形成的TiSi 2层和Ti层的叠层,(b)呈现非晶态的Ti基材料层。 TiSi2层通过使硅衬底与Ti层反应而自对准地形成。 薄的SiO 2层,并且具有较低的薄层电阻和致密的膜性质以及优异的阻挡性能。 Ti层层叠在TiSi2层上,用于改善相对于Al基材料的层的润湿性。 由于作为Al扩散路径发挥作用的晶粒边界被破坏,因此通过N 2离子注入形成多晶TiN层并且表现出优异的阻挡特性,形成非晶Ti基材料层。 与迄今为止用作具有优异阻隔性的材料层的TiON层相比,这两层都具有低的薄层电阻,同时相对于Al基材料的层具有优异的润湿性,使得高度可靠的接触 可能形成。
    • 4. 发明申请
    • SOLID-STATE IMAGE SENSOR AND CAMERA SYSTEM
    • 固态图像传感器和摄像机系统
    • US20140160332A1
    • 2014-06-12
    • US14002307
    • 2012-04-03
    • Hirofumi Sumi
    • Hirofumi Sumi
    • H04N5/374
    • H04N5/374H01L27/14603H01L27/14609H04N5/357H04N5/3658H04N5/378
    • A pixel includes an embedded photo diode (PD), an amplification transistor forming a source follower circuit having a gate for input and a source for output, and a transfer transistor that transfers a charge to the gate of the amplification transistor, the charge being photoelectrically converted by the PD. The amplification transistor is formed in a semiconductor substrate electrically isolated from a substrate on which the embedded PD and the transfer transistor are formed and the substrate of the amplification transistor is in a floating state. The reading unit includes a ΔΣ modulator that inputs/outputs the image signal per pixel unit and the output of the ΔΣ modulator is given, as feedback, to a capacitative unit functioning as a capacity to integrate the pixel.
    • 像素包括嵌入式光电二极管(PD),形成具有用于输入的栅极的源极跟随器电路和用于输出的源极跟随器电路的放大晶体管,以及将电荷转移到放大晶体管的栅极的转移晶体管,电荷是光电 由PD转换。 放大晶体管形成在与其上形成有嵌入式PD和传输晶体管的衬底电隔离的半导体衬底中,并且放大晶体管的衬底处于浮置状态。 阅读单位包括&Dgr&& 调制器,每像素单位输入/输出图像信号,并输出&Dgr;&Sgr; 作为反馈,将调制器作为集成像素的能力起作用的电容单元。