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    • 16. 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。