CN107134485A - 一种环形fet器件 - Google Patents

一种环形fet器件 Download PDF

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CN107134485A
CN107134485A CN201710511853.5A CN201710511853A CN107134485A CN 107134485 A CN107134485 A CN 107134485A CN 201710511853 A CN201710511853 A CN 201710511853A CN 107134485 A CN107134485 A CN 107134485A
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around
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fet device
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CN107134485B (zh
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李春江
翟媛
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Chengdu Hiwafer Technology Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/41Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
    • H01L29/417Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions carrying the current to be rectified, amplified or switched
    • H01L29/41725Source or drain electrodes for field effect devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/40Electrodes ; Multistep manufacturing processes therefor
    • H01L29/41Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions
    • H01L29/423Electrodes ; Multistep manufacturing processes therefor characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
    • H01L29/42312Gate electrodes for field effect devices
    • H01L29/42316Gate electrodes for field effect devices for field-effect transistors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/76Unipolar devices, e.g. field effect transistors
    • H01L29/772Field effect transistors

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Junction Field-Effect Transistors (AREA)

Abstract

本发明涉及半导体器件技术领域,具体涉及一种环形FET器件,从下至上包括衬底、缓冲层及势垒层,源极金属形成于势垒层上且底部延伸至缓冲层;栅极金属的第一环绕部为环绕源极金属的闭合环形,第一延伸部从第一环绕部延伸覆盖至环形隔离区;漏极金属的第二环绕部为环绕第一环绕部的非闭合环形,第二延伸部从第二环绕部延伸覆盖至环形隔离区;从衬底底部向上开设背孔至源极金属底面,且源极金属经背孔通过连接金属与背面金属相连。本发明通过将源极做成圆柱形并通过背孔接地,栅极和漏极均做成环状,可缩小管芯面积,降低栅延迟,提高器件工作速度,且更加均匀的电场分布可以给管芯提高更大的击穿电压,提高管芯的功率输出。

Description

一种环形FET器件
技术领域
本发明属于半导体器件技术领域,具体涉及一种环形FET器件。
背景技术
管芯的结构设计对于器件的性能影响严重,目前常用的场效应晶体管(FET)采用条形栅结构,源极和漏极分列栅极的两边。这种管芯设计,同样栅宽下,面积更大,栅延迟严重,并且由于电场的不均匀分布极易导致器件击穿。
发明内容
本发明的目的在于提供一种可以降低栅延迟、提高击穿电压的环形FET器件。
为达到上述要求,本发明采取的技术方案是:提供一种环形FET器件,从下至上包括衬底、缓冲层及势垒层;还包括环形隔离区、栅极金属、源极金属及漏极金属,环形隔离区形成于势垒层表面且延伸至缓冲层内部;源极金属形成于势垒层上且底部延伸至缓冲层;栅极金属包括第一环绕部和第一延伸部,第一环绕部为环绕源极金属的闭合环形,第一延伸部从第一环绕部沿第一直线方向延伸覆盖至环形隔离区;漏极金属包括第二环绕部和第二延伸部,第二环绕部为环绕第一环绕部的非闭合环形,第二延伸部从第二环绕部沿第二直线方向延伸覆盖至环形隔离区;从衬底底部向上开设背孔至源极金属底面,且源极金属经背孔通过连接金属与衬底底面的背面金属相连。
与现有技术相比,本发明具有以下优点:通过将源极做成圆柱形并通过背孔接地,栅极和漏极均做成环状,可缩小管芯面积,降低栅延迟,提高器件工作速度,且更加均匀的电场分布可以给管芯提高更大的击穿电压,提高管芯的功率输出。
附图说明
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,在这些附图中使用相同的参考标号来表示相同或相似的部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:
图1为本发明沿俯视图A-A方向的剖视图;
图2为本发明实施例1的俯视图;
图3为本发明实施例2的俯视图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚,以下结合附图及具体实施例,对本申请作进一步地详细说明。为简单起见,以下描述中省略了本领域技术人员公知的某些技术特征。
实施例1
如图1所示,本实施例提供一种环形FET器件,从下至上包括衬底2、缓冲层3及势垒层6;还包括环形隔离区4、栅极金属7、源极金属8及漏极金属5;环形隔离区4形成于势垒层6表面且延伸至缓冲层3内部,如图2所示,两条虚线之间的区域为环形隔离区4。源极金属8形成于势垒层6上且底部延伸至缓冲层3,源极金属8为圆柱形;栅极金属7包括第一环绕部71和第一延伸部72,第一环绕部71为环绕源极金属8的闭合圆环,且第一环绕部71的截面为T型,第一延伸部72从第一环绕部71沿第一直线方向延伸覆盖至环形隔离区4。漏极金属5包括第二环绕部51和第二延伸部52,第二环绕部51为环绕第一环绕部71的非闭合环形,第二延伸部52从第二环绕部51沿第二直线方向延伸覆盖至环形隔离区4;第二环绕部51的内边缘为非闭合圆形,外边缘为非闭合的矩形。第一延伸部72从第二环绕部51的开口处延伸出去。从衬底2底部向上开设9至源极金属8底面,且源极金属8经9通过连接金属与衬底2底面的背面金属1相连。
第一直线方向和所述第二直线方向位于同一直线上。
实施例2
如图3所示,本实施例源极金属8的横截面为正八边形,第一环绕部71为闭合的正八边环形,所述第二环绕部51的内边缘为非闭合的正八边形,外边缘为非闭合的正八边形,其他结构与实施例1相同。
以上实施例仅表示本发明的几种实施方式,其描述较为具体和详细,但并不能理解为对本发明范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明保护范围。因此本发明的保护范围应该以权利要求为准。

Claims (6)

1.一种环形FET器件,从下至上包括衬底、缓冲层及势垒层,其特征在于,还包括环形隔离区、栅极金属、源极金属及漏极金属,环形隔离区形成于势垒层表面且延伸至缓冲层内部;源极金属形成于势垒层上且底部延伸至缓冲层;栅极金属包括第一环绕部和第一延伸部,第一环绕部为环绕源极金属的闭合环形,第一延伸部从第一环绕部沿第一直线方向延伸覆盖至环形隔离区;漏极金属包括第二环绕部和第二延伸部,第二环绕部为环绕第一环绕部的非闭合环形,第二延伸部从第二环绕部沿第二直线方向延伸覆盖至环形隔离区;从衬底底部向上开设背孔至源极金属底面,且源极金属经背孔通过连接金属与衬底底面的背面金属相连。
2.根据权利要求1所述的环形FET器件,其特征在于,所述源极金属为圆柱形,所述第一环绕部为闭合圆环,所述第二环绕部的内边缘为非闭合圆形。
3.根据权利要求2所述的环形FET器件,其特征在于,所述第二环绕部的外边缘为非闭合圆形或多边形。
4.根据权利要求1所述的环形FET器件,其特征在于,所述源极金属的横截面为多边形,所述第一环绕部为闭合的多边环形,所述第二环绕部的内边缘为非闭合的多边形,且源极金属、第一环绕部及第二环绕部内边缘的边数相同。
5.根据权利要求4所述的环形FET器件,其特征在于,所述第二环绕部的外边缘为非闭合的多边形,且第二环绕部外边缘的边数与相同第二环绕部内边缘的边数相同。
6.根据权利要求1所述的环形FET器件,其特征在于,所述第一直线方向和所述第二直线方向位于同一直线上。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114496761A (zh) * 2022-04-06 2022-05-13 泰科天润半导体科技(北京)有限公司 一种圆形栅纵向mosfet功率器件的制造方法
CN115101608A (zh) * 2022-06-16 2022-09-23 中国科学院半导体研究所 石墨烯红外探测器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04165678A (ja) * 1990-10-30 1992-06-11 Nippon Motoroola Kk メッシュゲート型mosトランジスタ
EP0982777A1 (en) * 1998-08-25 2000-03-01 International Business Machines Corporation Wordline driver circuit using ring-shaped devices
JP2005303137A (ja) * 2004-04-14 2005-10-27 Sumitomo Electric Ind Ltd 横型半導体デバイスの配線構造
US20080303162A1 (en) * 2007-06-07 2008-12-11 Hidetoshi Ishida Semiconductor device
US20140353736A1 (en) * 2013-05-30 2014-12-04 Nichia Corporation Field-effect transistor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04165678A (ja) * 1990-10-30 1992-06-11 Nippon Motoroola Kk メッシュゲート型mosトランジスタ
EP0982777A1 (en) * 1998-08-25 2000-03-01 International Business Machines Corporation Wordline driver circuit using ring-shaped devices
JP2005303137A (ja) * 2004-04-14 2005-10-27 Sumitomo Electric Ind Ltd 横型半導体デバイスの配線構造
US20080303162A1 (en) * 2007-06-07 2008-12-11 Hidetoshi Ishida Semiconductor device
US20140353736A1 (en) * 2013-05-30 2014-12-04 Nichia Corporation Field-effect transistor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114496761A (zh) * 2022-04-06 2022-05-13 泰科天润半导体科技(北京)有限公司 一种圆形栅纵向mosfet功率器件的制造方法
CN114496761B (zh) * 2022-04-06 2022-06-17 泰科天润半导体科技(北京)有限公司 一种圆形栅纵向mosfet功率器件的制造方法
CN115101608A (zh) * 2022-06-16 2022-09-23 中国科学院半导体研究所 石墨烯红外探测器

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