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    • 16. 发明授权
    • Process for the fabrication of semiconductor devices having various
buried regions
    • 具有各种埋置区域的半导体器件的制造方法
    • US5789288A
    • 1998-08-04
    • US854584
    • 1997-05-12
    • Michele PalmieriPaola GalbiatiLodovica Vecchi
    • Michele PalmieriPaola GalbiatiLodovica Vecchi
    • H01L21/265H01L21/266H01L21/74H01L21/8249
    • H01L21/266H01L21/74H01L21/8249
    • A process for doping a P-type substrate (50) by forming a layer (52) of silicon nitride, implanting N-type impurities through this layer (FIG. 7), forming a resist mask (54) which leaves at least one area of the substrate (FIG. 8) containing a part of the nitride layer exposed, implanting N-type impurities first with an insufficient energy and then with a sufficient energy to traverse the nitride layer, subjecting (FIG. 9) the substrate to a high temperature treatment in an oxidizing environment to form silicon dioxide pads (55) on the areas of the substrate not covered by the nitride layer, removing the nitride layer and performing an implantation of P-type impurities into the areas delimited by the pads. The process then continues with the removal of the pads and, in the conventional manner, with the formation of an epitaxial layer and selective doping of this to form P-type and N-type regions in it. The process described allows the production of integrated devices with an additional buried layer while utilizing one fewer mask than conventional processes.
    • 一种用于通过形成氮化硅层(52)来掺杂P型衬底(50)的方法,通过该层注入N型杂质(图7),形成抗蚀剂掩模(54),其离开至少一个区域 (图8),包含暴露的氮化物层的一部分,首先用不足的能量注入N型杂质,然后以足够的能量穿过氮化物层,使衬底(图9)高 在氧化环境中进行温度处理以在未被氮化物层覆盖的衬底的区域上形成二氧化硅焊盘(55),去除氮化物层并且将P型杂质注入到由衬垫限定的区域中。 然后,该过程继续移除焊盘,并且以常规方式,形成外延层并选择性地掺杂以在其中形成P型和N型区域。 所描述的方法允许使用附加掩埋层的集成器件的生产,同时使用比常规工艺少的掩模。
    • 18. 发明授权
    • Belowground and oversupply protection of junction isolated integrated circuits
    • 接地隔离集成电路的地下和过充保护
    • US06271567B1
    • 2001-08-07
    • US09227946
    • 1999-01-11
    • Massimo PozzoniPaolo CordiniDomenico RossiGiorgio PedrazziniPaola GalbiatiMichele PalmieriLuca Bertolini
    • Massimo PozzoniPaolo CordiniDomenico RossiGiorgio PedrazziniPaola GalbiatiMichele PalmieriLuca Bertolini
    • H01L2362
    • H01L27/0266
    • In a junction isolated integrated circuit including power DMOS transistors formed in respective well regions or in an isolated epitaxial region on a substrate of opposite type of conductivity, circuits are formed in a distinct isolated region sensitive to oversupply and/or belowground effects. These effects are caused by respective power DMOS transistors coupled to the supply rail or ground. These effects are alternatively controllable by specifically shaped layout arrangements, and may be effectively protected from both effects. This is achieved by interposing between the region of sensitive circuits and the region containing the power DMOS transistors for which the alternatively implementable circuital arrangements are not formed, the region containing the power DMOS transistors coupled to the supply rail or to a ground rail for which the alternatively implementable arrangements are formed. The special interposition separates and shields the sensitive circuits from the power device whose oversupply or belowground effect is not countered by specific circuit arrangements.
    • 在包括功率DMOS晶体管的结隔离集成电路中,形成在相应的阱区域中或者在相反导电类型的衬底上的隔离的外延区域中形成的电路形成在对供过剩和/或地下效应敏感的不同隔离区域中。 这些影响是由耦合到电源轨或地的各个功率DMOS晶体管引起的。 这些效果可以通过特定形状的布置布置来替代地控制,并且可以被有效地保护免受两种影响。 这通过介于敏感电路的区域和包含不形成替代可实施的电路布置的功率DMOS晶体管的区域来实现,该区域包含耦合到电源轨的功率DMOS晶体管或接地导轨, 可替代地实施的布置形成。 特殊插件将灵敏电路与供电或地下效应不受特定电路布置的电源设备分离和屏蔽。
    • 19. 发明授权
    • Low on-resistance LDMOS
    • 低导通电阻LDMOS
    • US06538281B2
    • 2003-03-25
    • US09862750
    • 2001-05-22
    • Giuseppe CroceAlessandro MoscatelliAlessandra MerliniPaola Galbiati
    • Giuseppe CroceAlessandro MoscatelliAlessandra MerliniPaola Galbiati
    • H01L31119
    • H01L29/7816H01L29/0696H01L29/41758H01L29/41775H01L29/4238H01L29/456
    • An LDMOS structure is formed in a region of a first type of conductivity of a semiconductor substrate and comprises a gate, a drain region and a source region. The source region is formed by a body diffusion of a second type of conductivity within the first region, and a source diffusion of the first type of conductivity is within the body diffusion. An electrical connection diffusion of the second type of conductivity is a limited area of the source region, and extends through the source diffusion and reaches down to the body diffusion. At least one source contact is on the source diffusion and the electrical connection diffusion. The LDMOS structure further comprises a layer of silicide over the whole area of the source region short-circuiting the source diffusion and the electrical connection diffusion. The source contact is formed on the silicide layer.
    • LDMOS结构形成在半导体衬底的第一导电类型的区域中,并且包括栅极,漏极区域和源极区域。 源极区域由第一区域内的第二导电类型的体扩散形成,并且第一类型的导电性的源极扩散在体扩散内。 第二类导电性的电连接扩散是源极区域的有限区域,并且延伸穿过源极扩散并且向下延伸到身体扩散。 源扩散和电连接扩散至少有一个源触点。 LDMOS结构还包括在源极区域的整个区域上的硅化物层,使源扩散和电连接扩散短路。 源极接触形成在硅化物层上。
    • 20. 发明授权
    • Method for fabricating a semiconductor diode with BCD technology
    • 用BCD技术制造半导体二极管的方法
    • US5940700A
    • 1999-08-17
    • US725590
    • 1996-10-03
    • Paola GalbiatiUbaldo Mastromatteo
    • Paola GalbiatiUbaldo Mastromatteo
    • H01L21/329H01L29/861H01L21/8234
    • H01L29/66128H01L29/8611
    • A diode integrated on semiconductor material with BCD technology and of the type provided on a substrate having a first type of conductivity inside an isolation region having a second type of conductivity. The diode comprises also a buried anode region having a first type of conductivity and a cathode region having a second type of conductivity. The cathode region comprises an epitaxial layer located above the buried anode region and a highly doped region provided inside the epitaxial layer. The buried anode region comprises depressions opposite which is located the highly doped region with the depressions being achieved by the intersection of lateral diffusions of distinct and adjacent portions of the buried anode region.
    • 集成在具有BCD技术的半导体材料上的二极管,并且具有在具有第二类导电性的隔离区域内具有第一类型导电性的基板上提供的类型的二极管。 二极管还包括具有第一类导电性的掩埋阳极区域和具有第二类导电性的阴极区域。 阴极区域包括位于掩埋阳极区域上方的外延层和设置在外延层内部的高掺杂区域。 掩埋阳极区域包括相对的凹陷,其位于高掺杂区域,凹陷通过掩埋阳极区域的不同相邻部分的横向扩散的交叉来实现。