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    • 9. 发明申请
    • COUNTER-DOPED VARACTOR STRUCTURE AND METHOD
    • 计数器变结构和方法
    • US20100059860A1
    • 2010-03-11
    • US12207127
    • 2008-09-09
    • Chun-Li LiuOlin L. HartinJay P. JohnJames A. KirchgessnerVishal P. Trivedi
    • Chun-Li LiuOlin L. HartinJay P. JohnJames A. KirchgessnerVishal P. Trivedi
    • H01L21/329H01L29/93
    • H01L29/66174H01L29/93
    • An improved varactor diode (40) is obtained by providing a substrate (41) having a first surface (43), in which are formed a P+ region (53, 46) proximate the first surface (43), a first N region (54, 45) located beneath the P+ region (53, 46), an N well region (56, 44) located beneath the first N region (54, 45) and a first P counter-doped region (55) located between the first N region (54, 45) and the N well region (56, 44), thereby forming an P+NPN structure for the varactor diode. In some embodiments, a second P-type counter-doped region (59) is provided within the N-well region (56, 44) so as to reduce the N doping concentration within the N well region (56, 44) but without creating a further PN junction therein. The net doping profile (52) provides varactor diodes (40) having a larger tuning ratio than varactors (20) without such counter-doped regions. By interchanging N and P regions an N+PNP varactor is obtained.
    • 通过提供一种具有第一表面(43)的衬底(41),其中在第一表面(43)附近形成有P +区域(53,46),第一N区域(54) ,45),位于所述P +区(53,46)下方的N阱区(56,44)和位于所述第一N区(54,45)之下的第一P反掺杂区(55) 区域(54,45)和N阱区域(56,44),从而形成用于变容二极管的P + NPN结构。 在一些实施例中,第二P型反掺杂区域(59)设置在N阱区域(56,44)内,以便减小N阱区域(56,44)内的N掺杂浓度,但是不产生 其中一个PN结。 净掺杂分布(52)提供具有比可变电抗器(20)更大的调谐比率的变容二极管(40),而不具有这样的反掺杂区域。 通过交换N和P区域,获得N + PNP变容二极管。
    • 10. 发明申请
    • MOS device with multi-layer gate stack
    • 具有多层栅极堆叠的MOS器件
    • US20070176247A1
    • 2007-08-02
    • US11343623
    • 2006-01-30
    • Chun-Li LiuMarius OrlowskiMatthew Stoker
    • Chun-Li LiuMarius OrlowskiMatthew Stoker
    • H01L29/94
    • H01L29/4975H01L21/28097H01L29/517H01L29/518H01L29/78
    • Methods and apparatus are provided for semiconductor devices. The apparatus comprises a substrate having therein a source region and a drain region separated by a channel region extending to a first surface of the substrate, and a multilayered gate structure located above the channel region. The gate structure comprises, a gate dielectric, preferably of an oxide of Hf, Zr or HfZr substantially in contact with the channel region, a first conductor layer of, for example an oxide of MoSi overlying the gate dielectric, a second conductor layer of, e.g., poly-Si, overlying the first conductor layer and adapted to apply an electrical field to the channel region, and an impurity migration inhibiting layer (e.g., MoSi) located above or below the first conductor layer and adapted to inhibit migration of a mobile impurity, such as oxygen for example, toward the substrate.
    • 为半导体器件提供了方法和装置。 该装置包括其中具有源极区和漏极区的衬底,漏极区被延伸到衬底的第一表面的沟道区分离,以及位于沟道区上方的多层栅极结构。 栅极结构包括:栅极电介质,优选地与沟道区基本上接触的Hf,Zr或HfZr的氧化物,例如覆盖栅极电介质的MoSi的氧化物的第一导体层, 例如多晶硅,覆盖在第一导体层上并且适于向沟道区施加电场,以及位于第一导体层上方或下方的杂质迁移抑制层(例如MoSi),并适于抑制移动 杂质,例如氧气,朝向衬底。