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1. 发明授权

US07851857B2 Dual current path LDMOSFET with graded PBL for ultra high voltage smart power applications 有权
标题翻译：双电流路径LDMOSFET，具有分级PBL，适用于超高压智能电源应用
公开(公告)号：US07851857B2
公开(公告)日：2010-12-14
申请号：US12182398
申请日：2008-07-30
申请人： Yue Fu , Ronghua Zhu , Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer
发明人： Yue Fu , Ronghua Zhu , Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer
IPC分类号： H01L29/78 , H01L29/76 , H01L21/336
CPC分类号： H01L29/7816 , H01L29/0634 , H01L29/0696 , H01L29/0878 , H01L29/1095 , H01L29/402 , H01L29/41775 , H01L29/4238 , H01L29/66681
摘要： A dual current path LDMOSFET transistor (40) is provided which includes a substrate (400), a graded buried layer (401), an epitaxial drift region (404) in which a drain region (416) is formed, a first well region (406) in which a source region (412) is formed, a gate electrode (420) formed adjacent to the source region (412) to define a first channel region (107), and a current routing structure that includes a buried RESURF layer (408) in ohmic contact with a second well region (414) formed in a predetermined upper region of the epitaxial layer (404) so as to be completely covered by the gate electrode (420), the current routing structure being spaced apart from the first well region (406) and from the drain region (416) on at least a side of the drain region to delineate separate current paths from the source region and through the epitaxial layer.
摘要翻译：提供了双电流路径LDMOSFET晶体管（40），其包括衬底（400），渐变埋层（401），其中形成有漏极区（416）的外延漂移区（404），第一阱区 406），其中形成源区（412），与源极区（412）相邻形成以限定第一沟道区（107）的栅极（420），以及包括埋置的RESURF层的电流布线结构 408）与形成在外延层（404）的预定上部区域中的第二阱区域（414）欧姆接触，以便被栅电极（420）完全覆盖，电流布线结构与第一阱区域（406）和漏极区域（416）之间的区域，以描绘与源极区域和通过外延层的分离的电流路径。

2. 发明申请

US20100025756A1 Dual Current Path LDMOSFET with Graded PBL for Ultra High Voltage Smart Power Applications 有权
标题翻译：双电流路径LDMOSFET，具有用于超高压智能电源应用的分级PBL
公开(公告)号：US20100025756A1
公开(公告)日：2010-02-04
申请号：US12182398
申请日：2008-07-30
申请人： Yue Fu , Ronghua Zhu , Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer
发明人： Yue Fu , Ronghua Zhu , Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer
IPC分类号： H01L29/78 , H01L21/336
CPC分类号： H01L29/7816 , H01L29/0634 , H01L29/0696 , H01L29/0878 , H01L29/1095 , H01L29/402 , H01L29/41775 , H01L29/4238 , H01L29/66681
摘要： A dual current path LDMOSFET transistor (40) is provided which includes a substrate (400), a graded buried layer (401), an epitaxial drift region (404) in which a drain region (416) is formed, a first well region (406) in which a source region (412) is formed, a gate electrode (420) formed adjacent to the source region (412) to define a first channel region (107), and a current routing structure that includes a buried RESURF layer (408) in ohmic contact with a second well region (414) formed in a predetermined upper region of the epitaxial layer (404) so as to be completely covered by the gate electrode (420), the current routing structure being spaced apart from the first well region (406) and from the drain region (416) on at least a side of the drain region to delineate separate current paths from the source region and through the epitaxial layer.
摘要翻译：提供了双电流路径LDMOSFET晶体管（40），其包括衬底（400），渐变埋层（401），其中形成有漏极区（416）的外延漂移区（404），第一阱区 406），其中形成源区（412），与源极区（412）相邻形成以限定第一沟道区（107）的栅极（420），以及包括埋置的RESURF层的电流布线结构 408）与形成在外延层（404）的预定上部区域中的第二阱区（414）欧姆接触，以便被栅电极（420）完全覆盖，电流布线结构与第一阱区域（406）和漏极区域（416）之间的区域，以描绘与源极区域和通过外延层的分离的电流路径。

3. 发明申请

US20080265291A1 MOSFET DEVICE INCLUDING A SOURCE WITH ALTERNATING P-TYPE AND N-TYPE REGIONS 有权
标题翻译：包括具有替代P型和N型区域的源的MOSFET器件
公开(公告)号：US20080265291A1
公开(公告)日：2008-10-30
申请号：US11742363
申请日：2007-04-30
申请人： Ronghua Zhu , Amitava Bose , Vishnu K. Khemka , Todd C. Roggenbauer
发明人： Ronghua Zhu , Amitava Bose , Vishnu K. Khemka , Todd C. Roggenbauer
IPC分类号： H01L29/94 , H01L21/336
CPC分类号： H01L29/0847 , H01L29/0692 , H01L29/1087 , H01L29/456 , H01L29/7835
摘要： Apparatus and methods are provided for fabricating semiconductor devices with reduced bipolar effects. One apparatus includes a semiconductor body (120) including a surface and a transistor source (300) located in the semiconductor body proximate the surface, and the transistor source includes an area (310) of alternating conductivity regions (3110, 3120). Another apparatus includes a semiconductor body (120) including a first conductivity and a transistor source (500) located in the semiconductor body. The transistor source includes multiple regions (5120) including a second conductivity, wherein the regions and the semiconductor body form an area (510) of alternating regions of the first and second conductivities. One method includes implanting a semiconductor well (120) including a first conductivity in a substrate (110) and implanting a plurality of doped regions (5120) comprising a second conductivity in the semiconductor well. An area (510) comprising regions of alternating conductivities is then formed in the semiconductor well.
摘要翻译：提供了用于制造具有降低的双极效应的半导体器件的装置和方法。一种装置包括半导体本体（120），其包括位于半导体本体附近的表面和晶体管源（300），并且晶体管源包括交替导电区域（3110,3120）的区域（310）。另一种装置包括：半导体本体（120），其包括位于半导体本体中的第一导电性和晶体管源（500）。晶体管源包括包括第二导电性的多个区域（5120），其中所述区域和半导体主体形成第一和第二电导率的交替区域的区域（510）。一种方法包括在衬底（110）中注入包括第一导电性的半导体阱（120），并在半导体阱中注入包含第二导电性的多个掺杂区域（5120）。然后在半导体阱中形成包括交变电导率区域的区域（510）。

4. 发明申请

US20080113498A1 Variable resurf semiconductor device and method 有权
标题翻译：可变复用半导体器件及方法
公开(公告)号：US20080113498A1
公开(公告)日：2008-05-15
申请号：US11601127
申请日：2006-11-15
申请人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
发明人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
IPC分类号： H01L21/04
CPC分类号： H01L29/063 , H01L29/1083 , H01L29/66659 , H01L29/7835
摘要： Methods and apparatus are provided for semiconductor device (60, 95, 100, 106). The semiconductor device (60, 95, 100, 106), comprises a first region (64, 70) of a first conductivity type extending to a first surface (80), a second region (66) of a second, opposite, conductivity type forming with the first region (70) a first PN junction (65) extending to the first surface (80), a contact region (68) of the second conductivity type in the second region (66) at the first surface (80) and spaced apart from the first PN junction (65) by a first distance (LDS), and a third region (82, 96-98, 108) of the first conductivity type and of a second length (LBR), underlying the second region (66) and forming a second PN junction (63) therewith spaced apart from the first surface (80) and located closer to the first PN junction (65) than to the contact region (68). The breakdown voltage is enhanced without degrading other useful properties of the device (60, 95, 100, 106).
摘要翻译：为半导体器件（60,95,100,106）提供了方法和装置。半导体器件（60,95,100,106）包括延伸到第一表面（80）的第一导电类型的第一区域（64,70），第二相对导电类型的第二区域（66）与所述第一区域（70）形成延伸到所述第一表面（80）的第一PN结（65），在所述第一表面（80）处的所述第二区域（66）中的所述第二导电类型的接触区域（68）与第一PN结（65）间隔开第一距离（LDS DS），以及第一导电类型和第二长度的第三区域（82,96,108,108）在第二区域（66）下方形成第二PN结（63），第二PN结（63）与第一表面（80）间隔开并且位于更靠近第一PN结（65）的位置，而不是接触区域（68）。提高击穿电压，而不会降低器件（60,95,100,106）的其他有用特性。

5. 发明授权

US08188543B2 Electronic device including a conductive structure extending through a buried insulating layer 有权
标题翻译：电子器件包括延伸穿过掩埋绝缘层的导电结构
公开(公告)号：US08188543B2
公开(公告)日：2012-05-29
申请号：US11556576
申请日：2006-11-03
申请人： Todd C. Roggenbauer , Vishnu K. Khemka , Ronghua Zhu , Amitava Bose , Paul Hui , Xiaoqiu Huang
发明人： Todd C. Roggenbauer , Vishnu K. Khemka , Ronghua Zhu , Amitava Bose , Paul Hui , Xiaoqiu Huang
IPC分类号： H01L27/01
CPC分类号： H01L27/105 , H01L21/76264 , H01L21/84 , H01L27/1203 , H01L27/13
摘要： An electronic device can include a substrate, a buried insulating layer overlying the substrate, and a semiconductor layer overlying the buried insulating layer, wherein the semiconductor layer is substantially monocrystalline. The electronic device can also include a conductive structure extending through the semiconductor layer and buried insulating layer and abutting the substrate, and an insulating spacer lying between the conductive structure and each of the semiconductor layer and the buried insulating layer.
摘要翻译：电子器件可以包括衬底，覆盖衬底的掩埋绝缘层和覆盖掩埋绝缘层的半导体层，其中半导体层基本上是单晶的。电子器件还可以包括延伸穿过半导体层和掩埋绝缘层并邻接衬底的导电结构，以及位于导电结构与半导体层和埋入绝缘层中的每一个之间的绝缘衬垫。

6. 发明授权

US07550804B2 Semiconductor device and method for forming the same 有权
标题翻译：半导体装置及其形成方法
公开(公告)号：US07550804B2
公开(公告)日：2009-06-23
申请号：US11390796
申请日：2006-03-27
申请人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
发明人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
IPC分类号： H01L29/76
CPC分类号： H01L29/7835 , H01L29/0634 , H01L29/0653 , H01L29/0847 , H01L29/0878 , H01L29/0882 , H01L29/0886 , H01L29/1045 , H01L29/1083 , H01L29/7816
摘要： A semiconductor device may include a semiconductor substrate having a first dopant type. A first semiconductor region within the semiconductor substrate may have a plurality of first and second portions (44, 54). The first portions (44) may have a first thickness, and the second portions (54) may have a second thickness. The first semiconductor region may have a second dopant type. A plurality of second semiconductor regions (42) within the semiconductor substrate may each be positioned at least one of directly below and directly above a respective one of the first portions (44) of the first semiconductor region and laterally between a respective pair of the second portions (54) of the first semiconductor region. A third semiconductor region (56) within the semiconductor substrate may have the first dopant type. A gate electrode (64) may be over at least a portion of the first semiconductor region and at least a portion of the third semiconductor region (56).
摘要翻译：半导体器件可以包括具有第一掺杂剂类型的半导体衬底。半导体衬底内的第一半导体区域可以具有多个第一和第二部分（44,45）。第一部分（44）可以具有第一厚度，并且第二部分（54）可以具有第二厚度。第一半导体区域可以具有第二掺杂剂类型。半导体衬底内的多个第二半导体区域（42）可以各自定位在第一半导体区域的第一部分（44）的相应一个的正下方并直接位于第一半导体区域的第一部分（44）的下方中的至少一个，并且横向地位于相应的一对第二半导体区域第一半导体区域的部分（54）。半导体衬底内的第三半导体区域（56）可具有第一掺杂剂类型。栅电极（64）可以在第一半导体区域的至少一部分和第三半导体区域（56）的至少一部分之上。

7. 发明授权

US07439584B2 Structure and method for RESURF LDMOSFET with a current diverter 有权
标题翻译：具有电流分流器的RESURF LDMOSFET的结构和方法
公开(公告)号：US07439584B2
公开(公告)日：2008-10-21
申请号：US11363901
申请日：2006-02-28
申请人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
发明人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
IPC分类号： H01L29/76 , H01L29/94
CPC分类号： H01L29/8611 , H01L29/063 , H01L29/0653 , H01L29/1045 , H01L29/1083 , H01L29/7835
摘要： Methods and apparatus are provided for reducing substrate leakage current of RESURF LDMOSFET devices. A semiconductor device comprises a semiconductor substrate (22) of a first type; first and second terminals (39,63) laterally spaced-apart on a surface (35) above the substrate; a first semiconductor region (32) of the first type overlying the substrate and ohmically coupled to the first terminal (39); a second semiconductor region (48) of a second opposite type in proximity to the first region and ohmically coupled to the first terminal; a third semiconductor region (30) of the second type overlying the substrate and ohmically coupled to the second terminal (63) and laterally arranged with respect to the first region; a parasitic vertical device comprising the first region and the substrate, the parasitic vertical device for permitting leakage current to flow from the first terminal to the substrate; a fourth semiconductor region (62) of the first type in proximity to the third region and ohmically coupled to the second terminal, thereby forming in combination with the third region a shorted base-collector region of a lateral transistor extending between the first and second terminals to provide diode action; a channel region (27) of the first type separating the first and third regions at the surface; a gate insulator (43) overlying the channel region; and a gate electrode (42) overlying the gate insulator.
摘要翻译：提供了减少RESURF LDMOSFET器件的衬底漏电流的方法和装置。半导体器件包括第一类型的半导体衬底（22）在衬底上方的表面（35）上横向间隔开的第一和第二端子（39,63）第一类型的第一半导体区域（32），覆盖衬底并欧姆耦合到第一端子（39）; 邻近第一区域的第二相对类型的第二半导体区域（48），并且欧姆耦合到第一端子; 第二类型的第三半导体区域（30），覆盖在所述衬底上并且欧姆耦合到所述第二端子（63）并且相对于所述第一区域横向布置; 包括第一区域和衬底的寄生垂直器件，用于允许漏电流从第一端子流到衬底的寄生垂直器件; 第一类型的第四半导体区域（62），邻近第三区域并且欧姆耦合到第二端子，从而与第三区域组合形成在第一和第二端子之间延伸的横向晶体管的短路基极集电极区域提供二极管动作; 所述第一类型的沟道区域（27）在所述表面处分隔所述第一和第三区域; 栅极绝缘体（43），覆盖所述沟道区域; 以及覆盖栅极绝缘体的栅电极（42）。

8. 发明授权

US07405128B1 Dotted channel MOSFET and method 有权
标题翻译：点通道MOSFET及方法
公开(公告)号：US07405128B1
公开(公告)日：2008-07-29
申请号：US11674888
申请日：2007-02-14
申请人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
发明人： Vishnu K. Khemka , Amitava Bose , Todd C. Roggenbauer , Ronghua Zhu
IPC分类号： H01L21/336
CPC分类号： H01L29/7835 , H01L29/0692 , H01L29/1045 , H01L29/1087 , H01L29/4238 , H01L29/66659 , H01L29/78
摘要： A improved MOSFET (50, 51, 75, 215) has a source (60) and drain (62) in a semiconductor body (56), surmounted by an insulated control gate (66) located over the body (56) between the source (60) and drain (62) and adapted to control a conductive channel (55) extending between the source (60) and drain (62). The insulated gate (66) is perforated by a series of openings (61) through which highly doped regions (69) in the form of a series of (e.g., square) dots (69) of the same conductivity type as the body (56) are provided, located in the channel (55), spaced apart from each other and from the source (60) and drain (62). These channel dots (69) are desirably electrically coupled to a highly doped contact (64) to the body (56). The resulting device (50, 51, 75, 215) has a greater SOA, higher breakdown voltage and higher HBM stress resistance than equivalent prior art devices (20) without the dotted channel. Threshold voltage is not affected.
摘要翻译：改进的MOSFET（50,51,75,215）在半导体本体（56）中具有源极（60）和漏极（62），其被位于源极（56）之间的绝缘控制栅极（66）所覆盖，（60）和漏极（62），并且适于控制在源极（60）和漏极（62）之间延伸的导电通道（55）。绝缘栅极（66）由一系列开口（61）穿孔，通过该开口（61），与体（56）相同导电类型的一系列（例如，正方形）点（69）形式的高度掺杂区域（69）穿过该开口）设置在通道（55）中，彼此间隔开并且与源（60）和排水口（62）间隔开。这些通道点（69）期望地电耦合到主体（56）的高度掺杂的触点（64）。所得到的器件（50,51,75,215）具有比没有点通道的等效现有技术器件（20）更大的SOA，更高的击穿电压和更高的HBM应力电阻。阈值电压不受影响。

9. 发明申请

US20080122025A1 ELECTRONIC DEVICE INCLUDING A CONDUCTIVE STRUCTURE EXTENDING THROUGH A BURIED INSULATING LAYER 有权
标题翻译：电子设备，包括通过绝缘绝缘层延伸的导电结构
公开(公告)号：US20080122025A1
公开(公告)日：2008-05-29
申请号：US11556576
申请日：2006-11-03
申请人： Todd C. Roggenbauer , Vishnu K. Khemka , Ronghua Zhu , Amitava Bose , Paul Hui , Xiaoqiu Huang
发明人： Todd C. Roggenbauer , Vishnu K. Khemka , Ronghua Zhu , Amitava Bose , Paul Hui , Xiaoqiu Huang
IPC分类号： H01L27/00
CPC分类号： H01L27/105 , H01L21/76264 , H01L21/84 , H01L27/1203 , H01L27/13
摘要： An electronic device can include a substrate, a buried insulating layer overlying the substrate, and a semiconductor layer overlying the buried insulating layer, wherein the semiconductor layer is substantially monocrystalline. The electronic device can also include a conductive structure extending through the semiconductor layer and buried insulating layer and abutting the substrate, and an insulating spacer lying between the conductive structure and each of the semiconductor layer and the buried insulating layer.
摘要翻译：电子器件可以包括衬底，覆盖衬底的掩埋绝缘层和覆盖掩埋绝缘层的半导体层，其中半导体层基本上是单晶的。电子器件还可以包括延伸穿过半导体层和掩埋绝缘层并邻接衬底的导电结构，以及位于导电结构与半导体层和埋入绝缘层中的每一个之间的绝缘衬垫。

10. 发明申请

US20080079122A1 Termination structures for super junction devices 有权
公开(公告)号：US20080079122A1
公开(公告)日：2008-04-03
申请号：US11540770
申请日：2006-09-29
申请人： Ronghua Zhu , Amitava Bose , Vishnu K. Khemka , Todd C. Roggenbauer
发明人： Ronghua Zhu , Amitava Bose , Vishnu K. Khemka , Todd C. Roggenbauer
IPC分类号： H01L23/58
CPC分类号： H01L29/0634 , H01L29/0653 , H01L29/0692 , H01L29/1045 , H01L29/66659 , H01L29/7835 , H01L2924/0002 , H01L2924/00
摘要： A semiconductor device 10 is provided. A first layer 12 has a first dopant type; a second layer 14 is provided over the first layer 12; and a third layer 16 is provided over the second layer and has the first dopant type. A plurality of first and second semiconductor regions 22, 24 are within the third layer. The first semiconductor region 22 has the first dopant type, and the second semiconductor region 24 has the second dopant type. The first and second semiconductor regions 22, 24 are disposed laterally to one another in an alternating pattern to form a super junction, and the super junction terminates with a final second semiconductor region 24, 24′ of the second dopant type.

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