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    • 9. 发明公开
    • Contact metallization of semiconductor integrated circuit devices
    • 电子邮件地址:Halbleiterschaltungsvorrichtungen。
    • EP0400877A2
    • 1990-12-05
    • EP90305583.8
    • 1990-05-23
    • AT&T Corp.
    • Chen, Min-LiangLeung, Chung Wai
    • H01L23/485H01L21/285H01L21/90
    • H01L21/28518H01L21/76838H01L23/53223H01L2924/0002H01L2924/00
    • In the manufacture of semiconductor integrated-circuit devices, electrical contact to semiconductor regions (3) such as, e.g., source and drain regions of field-effect transistors typically is made by a structure in which a silicide (91) is intermediary to silicon and metal (11). The invention provides for processing, after window formation and before metal deposition, which includes deposition of a silicide-forming material (92), and annealing in a non-oxidizing atmosphere. Preferably, the atmosphere includes a component which forms a conductive compound (93) with the silicide-forming material. Resulting contact structures have good step coverage, low contact resistance, low interdiffusion of metal into semiconductor, and fail-safe operation in the event of breaks due to electromigration. Moreover, in the case of misalignment of a window, a contact region may be extended laterally by dopant diffusion, thereby safeguarding the junction. Tolerance to window misalignment permits increased packing density, e.g., in dynamic random-access memory arrays.
    • 在半导体集成电路器件的制造中,与半导体区域(3)(例如场效应晶体管的源极和漏极区域)的电接触通常由其中硅化物(91)介于硅和 金属(11)。 本发明提供了窗口形成之后和金属沉积之前的处理,其包括沉积硅化物形成材料(92)并在非氧化气氛中进行退火。 优选地,气氛包括与硅化物形成材料形成导电化合物(93)的组分。 导致的接触结构具有良好的台阶覆盖率,低接触电阻,金属向半导体的低相互扩散,以及由于电迁移而导致中断的故障安全操作。 此外,在窗口未对准的情况下,可以通过掺杂剂扩散横向延伸接触区域,从而保护接合部。 对窗口偏移的容限允许增加打包密度,例如在动态随机存取存储器阵列中。