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    • 13. 发明授权
    • Method of forming P-type islands over P-type buried layer
    • 在P型掩埋层上形成P型岛的方法
    • US5633180A
    • 1997-05-27
    • US456727
    • 1995-06-01
    • George Bajor
    • George Bajor
    • H01L21/74H01L21/265
    • H01L21/74
    • A method of fabricating a vertical conductive region in a semiconductor device in which plural epitaxial layers are successively grown on a substrate and a dopant is implanted into each epitaxial layer before growing the next layer. A fast vertical transistor operable in the GHz range and at high voltage (e.g., more than about 10 volts) is fabricated by growing plural epitaxial layers, each with a thickness less than about 2.5 microns until the desired height of the vertical conductive region is reached. Sections of the transistor's collector and an adjacent sinker are implanted through each epitaxial layer before the next layer is grown. Annealing after ion implant joins the sinker and collector sections in each layer with the corresponding sinker and collector sections in adjacent layers to form unitary structures in the transistor. Each layer is thin enough for the dopant to penetrate to the bottom of the layer using conventional implant energy. The manufacturing process does not limit the height of the sinker or collector.
    • 在半导体器件中制造垂直导电区域的方法,其中在衬底上连续生长多个外延层,并且在生长下一层之前将掺杂剂注入到每个外延层中。 可以通过生长多个外延层来制造在GHz范围和高电压(例如,大于约10伏特)下工作的快速垂直晶体管,每个外延层具有小于约2.5微米的厚度,直到达到所需垂直导电区域的高度 。 在下一层生长之前,通过每个外延层注入晶体管集电极和相邻沉降片的部分。 离子注入后的退火将每个层中的沉降片和集电极部分与相邻层中的相应沉降片和集电极部分结合,以在晶体管中形成单一结构。 每个层都足够薄以使掺杂剂使用常规的注入能量渗透到层的底部。 制造过程不限制沉降片或收集器的高度。
    • 18. 发明授权
    • BICMOS process with low temperature coefficient resistor (TCRL)
    • BICMOS工艺采用低温系数电阻(TCRL)
    • US06812108B2
    • 2004-11-02
    • US10393181
    • 2003-03-19
    • Donald HemmenwayJose DelgadoJohn ButlerAnthony RivoliMichael D. ChurchGeorge V. RouseLawrence G. PearceGeorge Bajor
    • Donald HemmenwayJose DelgadoJohn ButlerAnthony RivoliMichael D. ChurchGeorge V. RouseLawrence G. PearceGeorge Bajor
    • H01L2120
    • H01L28/20H01L21/763H01L21/8249H01L27/0635
    • A low temperature coefficient resistor(TCRL) has some unrepaired ion implant damage. The damaged portion raises the resistance and renders the resistor less sensitive to operating temperature fluctuations. A polysilicon thin film low temperature coefficient resistor and a method for the resistor's fabrication overcomes the coefficient of resistance problem of the prior art, while at the same time eliminating steps from the BiCMOS fabrication process, optimizing bipolar design tradeoffs, and improving passive device isolation. A low temperature coefficient of resistance resistor (TCRL) is formed on a layer of insulation, typically silicon dioxide or silicon nitride, the layer comprising polysilicon having a relatively high concentration of dopants of one or more species. An annealing process is used for the implanted resistor which is shorter than that for typical prior art implanted resistors, leaving some intentional unannealed damage in the resistor. The planned damage gives the TCRL a higher resistance without increasing its temperature coefficient. A process for fabrication of the resistor is used which combines separate spacer oxide depositions, provides buried layers having different diffusion coefficients, incorporates dual dielectric trench sidewalls that double as a polish stop, supplies a spacer structure that controls precisely the emitter-base dimension, and integrates bipolar and CMOS devices with negligible compromise to the features of either type.
    • 低温度系数电阻(TCRL)具有一些未修复的离子注入损伤。 损坏部分会提高电阻,使电阻对工作温度波动较不敏感。 多晶硅薄膜低温系数电阻器和电阻器制造方法克服了现有技术的电阻系数问题,同时消除了BiCMOS制造工艺的步骤,优化了双极设计的权衡,改善了无源器件隔离。 在绝缘层(通常为二氧化硅或氮化硅)上形成电阻电阻器(TCRL)的低温度系数,该层包含具有相对高浓度的一种或多种物质的掺杂剂的多晶硅。 对于注入电阻器而言,使用退火工艺,其比典型的现有技术的注入电阻器的退火工艺短,从而在电阻器中留下一些有意的未退火损坏。 计划的损坏使TCRL具有更高的阻力,而不增加其温度系数。 使用制造电阻器的方法,其组合分开的间隔氧化物沉积,提供具有不同扩散系数的掩埋层,并入双重介质沟槽侧壁作为抛光停止点,提供精确控制发射极基底尺寸的间隔结构,以及 将双极和CMOS器件集成到任何一种类型的特性上都可忽略不计。