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    • 5. 发明申请
    • LOW TEMPERATURE POLY-SILICON TFT SUBSTRATE STRUCTURE AND MANUFACTURE METHOD THEREOF
    • 低温聚硅薄膜基板结构及其制造方法
    • US20170033134A1
    • 2017-02-02
    • US14758964
    • 2015-04-22
    • Shenzhen China Star Optoelectronics Technology Co., Ltd.
    • Xiaoxing ZHANG
    • H01L27/12H01L29/786
    • H01L27/1296H01L27/1218H01L27/1222H01L27/124H01L27/1262H01L27/1274H01L27/1281H01L27/3262H01L29/78675H01L29/78696
    • The present invention provides a Low Temperature Poly-silicon TFT substrate structure and a manufacture method thereof. By providing the buffer layers in the drive TFT area and the display TFT area with different thicknesses, of which the thickness of the buffer layer in the drive TFT area is larger, and the thickness of the buffer layer in the display TFT area is smaller, different temperature grades are formed in the crystallization process of the polysilicon to achieve the control to the grain diameters of the crystals. The polysilicon layer with larger lattice dimension is formed in the drive TFT area in the crystallization process to raise the electron mobility. The fractured crystals of polysilicon layer in the display TFT area can be obtained in the crystallization process for ensuring the uniformity of the grain boundary and raising the uniformity of the current. Accordingly, the electrical property demands for different TFTs can be satisfied to raise the light uniformity of the OLED.
    • 本发明提供一种低温多晶硅TFT基板结构及其制造方法。 通过在驱动TFT区域中提供缓冲层和不同厚度的显示TFT区域,其中驱动TFT区域中的缓冲层的厚度较大,并且显示TFT区域中缓冲层的厚度较小, 在多晶硅的结晶过程中形成不同的温度等级,以实现对晶体的晶粒直径的控制。 晶格尺寸较大的多晶硅层在晶化过程中形成在驱动TFT区域,以提高电子迁移率。 在用于确保晶界的均匀性并提高电流的均匀性的结晶过程中可以获得显示TFT区域中的多晶硅层的断裂晶体。 因此,可以满足不同TFT的电性能要求,以提高OLED的光均匀性。
    • 6. 发明授权
    • Method for manufacturing LTPS TFT substrate and LTPS TFT substrate
    • 制造LTPS TFT基板和LTPS TFT基板的方法
    • US09520421B1
    • 2016-12-13
    • US14771502
    • 2015-06-29
    • Shenzhen China Star Optoelectronics Technology Co., Ltd.
    • Songshan Li
    • H01L27/12H01L21/02H01L29/66H01L21/265
    • H01L27/1281H01L21/02422H01L21/02488H01L21/02502H01L21/02532H01L21/02672H01L21/26513H01L27/1262H01L29/66757
    • The present invention provides a method for manufacturing a LTPS TFT substrate and a LTPS TFT substrate. The method for manufacturing the LTPS TFT substrate of the present invention forms a thermally conductive electrical insulation layer having excellent properties of electrical insulation and thermal conductivity on a buffer layer to quickly absorb a great amount of heat during a RTA process to be transferred to an amorphous silicon layer in contact therewith so that the portion of the amorphous silicon at this site shows an increased efficiency of crystallization, whereby polycrystalline silicon has an increased grain size and reduced gain boundaries and thus the mobility of charge carriers of a corresponding TFT device is increased and the influence of the leakage current caused by grain boundary is reduced. The LTPS TFT substrate of the present invention includes a thermally conductive electrical insulation layer formed on a buffer layer at a location exactly under a polycrystalline silicon semiconductor layer and the grain size of the crystallization of the polycrystalline silicon is relatively large, the grain boundaries are reduced in number, the mobility of charge carriers of a TFT device is increased, and the electrical property of the TFT is improved.
    • 本发明提供一种制造LTPS TFT基板和LTPS TFT基板的方法。 本发明的LTPS TFT基板的制造方法形成了在缓冲层上具有优异的电绝缘性和导热性的导热电绝缘层,以在RTA工艺中快速吸收大量的热量以转移到非晶态 硅层与其接触,使得该位置处的非晶硅部分显示提高的结晶效率,由此多晶硅具有增加的晶粒尺寸和减小的增益边界,因此相应的TFT器件的电荷载流子的迁移率增加, 晶界引起的漏电流的影响减小。 本发明的LTPS TFT基板包括形成在位于多晶硅半导体层正下方的位置的缓冲层上的导热电绝缘层,并且多晶硅的结晶晶粒尺寸相对较大,晶界减小 在TFT器件中,电荷载流子的迁移率增加,TFT的电性能提高。