WO2013104193A1 - 隧穿场效应晶体管及其制备方法 - Google Patents

隧穿场效应晶体管及其制备方法 Download PDF

Info

Publication number
WO2013104193A1
WO2013104193A1 PCT/CN2012/081083 CN2012081083W WO2013104193A1 WO 2013104193 A1 WO2013104193 A1 WO 2013104193A1 CN 2012081083 W CN2012081083 W CN 2012081083W WO 2013104193 A1 WO2013104193 A1 WO 2013104193A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
effect transistor
source
gate
field effect
Prior art date
Application number
PCT/CN2012/081083
Other languages
English (en)
French (fr)
Inventor
崔宁
梁仁荣
王敬
许军
Original Assignee
清华大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 清华大学 filed Critical 清华大学
Priority to US13/695,341 priority Critical patent/US8803225B2/en
Publication of WO2013104193A1 publication Critical patent/WO2013104193A1/zh

Links

Classifications

    • 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
    • H01L29/66007Multistep manufacturing processes
    • H01L29/66075Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
    • H01L29/66227Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
    • H01L29/66356Gated diodes, e.g. field controlled diodes [FCD], static induction thyristors [SITh], field controlled thyristors [FCTh]
    • 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
    • H01L29/70Bipolar devices
    • H01L29/72Transistor-type devices, i.e. able to continuously respond to applied control signals
    • H01L29/739Transistor-type devices, i.e. able to continuously respond to applied control signals controlled by field-effect, e.g. bipolar static induction transistors [BSIT]
    • H01L29/7391Gated diode structures

Definitions

  • the present invention relates to the field of semiconductor design and manufacturing technologies, and in particular, to a tunneling field effect transistor and a method of fabricating the same. Background technique
  • MOSFET metal-oxide-semiconductor field effect transistor
  • the off-state leakage current rises rapidly as the feature size of the integrated circuit shrinks, in order to reduce the leakage current, thereby further reducing the power consumption of the device and increasing the withstand voltage of the device.
  • tunneling transistors with different operating principles of MOSFETs are widely used.
  • the conventional tunneling transistor has a planar structure, and the drain and the source are located on the same plane of the semiconductor substrate.
  • the tunneling transistor of this structure has poor high-voltage resistance, large on-resistance, and high power consumption.
  • the shape of the device is a regular quadrilateral, and the heat dissipation area is small, which is disadvantageous for heat dissipation. Therefore, how to improve the withstand voltage capability of the tunneling transistor, improve the heat dissipation performance, and reduce the power consumption are one of the technical problems that need to be solved in the development of the tunneling transistor. Summary of the invention
  • the present invention aims to at least solve one of the above technical drawbacks, and in particular, solves the shortcomings of the conventional tunneling field effect transistor which has poor high voltage resistance, high on-resistance and high power consumption. Therefore, a high voltage resistant tunneling field effect transistor and a method of fabricating the same are proposed.
  • the tunneling field effect transistor includes: a semiconductor substrate and a drain layer formed therein, the drain layer being heavily doped in a first type; and an epitaxial layer formed on the drain layer An isolation region is formed in the epitaxial layer; a buried layer is formed in the epitaxial layer, the buried layer is a second type of lightly doped; a source, the source is formed in the buried In the layer, the source is heavily doped with a second type; a gate dielectric layer and a gate, the gate dielectric layer is formed on the epitaxial layer, and the gate is formed on the gate dielectric layer; a source metal contact layer and a drain metal contact layer, the source metal contact layer being formed on the source, and the drain metal contact layer being formed under the drain layer.
  • the material of the epitaxial layer comprises silicon, germanium silicon, silicon carbide or m-v semiconductor material.
  • the epitaxial layer is a silicon/germanium silicon multilayer composite structure.
  • the epitaxial layer is intrinsic or lightly doped, which increases the high voltage capability of the device and adjusts the on-resistance of the device to limit power dissipation at high currents.
  • the tunneling field effect transistor has a shape including a polygon, a circle, a line, and an arc.
  • the tunneling field effect transistor has a diamond shape, which can increase the heat dissipation area of the device, improve the heat dissipation capability of the device, and optimize the characteristics of the device under a large current.
  • the gate dielectric layer is a work function tuning layer.
  • isolated sidewalls are formed on sidewalls of the gate dielectric layer and the gate.
  • the material of the interface between the source metal contact layer and the source and the interface between the drain metal contact layer and the drain layer is a metal semiconductor alloy.
  • a passivation layer is formed on the source metal contact layer and the gate, and the passivation layer is formed through the passivation layer to the source metal contact layer respectively. And a plurality of contact holes of the gate.
  • a plurality of metal interconnections are formed on the passivation layer, and the plurality of metal interconnections are connected to the source metal contact layer and the gate through the plurality of contact holes.
  • a tunneling field effect transistor according to an embodiment of the present invention, a second type of non- heavily doped region (ie, a buried layer) near the source and a first type of non-heavily doped region (ie, an epitaxial layer) near the drain layer,
  • the breakdown resistance of the device in the off state is improved.
  • the surface In the on state, due to the field effect of the gate voltage, the surface will form electron accumulation or electron inversion, so the two regions (ie buried layer and epitaxial layer) will not Affects the on-state characteristics of the device.
  • the tunneling field effect transistor of the embodiment of the invention has a vertical structure, and the channel region length is longer than that of a common planar tunneling field effect transistor, and the cross-sectional area is also much larger than that of a common planar tunneling field effect transistor, which can improve device source and drain. High voltage capability, optimized device characteristics at high currents.
  • Another aspect of the present invention provides a method of fabricating a tunneling field effect transistor, comprising the steps of: providing a substrate, forming a first type of heavily doped drain layer on the substrate; S2: Forming an epitaxial layer on the drain layer; S3: forming an isolation region in the epitaxial layer; S4: forming a gate dielectric layer over the epitaxial layer, forming a gate on the gate dielectric layer; S5: photolithography Ion implantation is performed in the case of mask masking, and diffusion and annealing are performed to form a second type of lightly doped buried layer; S6: photolithography, ion implantation is performed in the case of mask masking, and diffusion and annealing are performed to form a second type of heavily doped source; and S7: a source metal contact layer is formed over the source, and a drain metal contact layer is formed under the drain layer.
  • step S5 there are the steps of: forming spacer sidewalls on the sidewalls of the gate dielectric layer and the gate.
  • the method has the following steps: S8: forming a passivation layer over the source metal contact layer and the gate, and then photolithography, etching, in the blunt Forming a plurality of contact holes respectively penetrating to the source metal contact layer and the gate; S9: forming a plurality of metal interconnections over the passivation layer, the plurality of metal interconnections passing through A plurality of contact holes are connected to the source metal contact layer and the gate.
  • the material of the epitaxial layer comprises silicon, germanium silicon, silicon carbide or m-v semiconductor material.
  • the epitaxial layer is intrinsic or lightly doped.
  • the shape of the tunneling field effect transistor comprises a pattern consisting of a polygon, a circle, a line and an arc, or a pattern consisting of irregular arcs.
  • the tunneling field effect transistor has a diamond shape.
  • the gate dielectric layer is a work function tuning layer.
  • the material of the interface between the source metal contact layer and the source and the interface between the drain metal contact layer and the drain layer is a metal semiconductor alloy.
  • preparing a low-doped or intrinsic epitaxial layer over the drain can increase the high-voltage resistance of the device, adjust the on-resistance of the device, and limit the power consumption at a large current. And preparing a second type of non-heavily doped region (ie, a buried layer) near the source, and preparing a first type of non-heavily doped region (ie, an epitaxial layer) near the drain layer, which can improve the device in the off state. Resistance to breakdown.
  • FIG. 1 is a schematic structural view of a tunneling field effect transistor according to an embodiment of the present invention.
  • FIGS. 2 to 10 are structural views showing an intermediate state of a tunneling field effect transistor formed in the steps of the method of fabricating the tunneling field effect transistor of the embodiment of the present invention.
  • drain layer 1 drain layer; 2 epitaxial layer; 3 isolation region; 4 gate dielectric layer; 5 gate;
  • the structure of the first feature described below "on" the second feature may include embodiments in which the first feature and the second feature are formed in direct contact, and may include additional features formed in the first feature and the second feature. Between the embodiments, such that the first feature and the second feature may not be in direct contact.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include one or more of the features, either explicitly or implicitly.
  • the tunneling field effect transistor includes: a semiconductor substrate and a drain layer 1 formed therein, the drain layer 1 is heavily doped in a first type; the epitaxial layer 2, an epitaxial layer 2 is formed on the drain On the layer 1, an isolation region 3 is formed in the epitaxial layer 2; a buried layer 6 is formed in the epitaxial layer 2, the buried layer 6 is lightly doped in the second type; the source 8 and the source 8 are formed in the buried layer In the layer 6, the source 8 is heavily doped in the second type; the gate dielectric layer 4 and the gate 5, the gate dielectric layer 4 is formed on the epitaxial layer 2, and the gate 5 is formed on the gate dielectric layer 4; The electrode metal contact layer 9 and the drain metal contact layer 11, the source metal contact layer 9 are formed over the source electrode 8, and the drain metal contact layer 11 is formed under the drain layer 1.
  • the semiconductor substrate can be any semiconductor substrate from which a tunneling field effect transistor is fabricated, and can be specifically, but not limited to, silicon, germanium, germanium, gallium arsenide.
  • a drain layer 1 is formed in the semiconductor substrate, and the drain layer 1 is heavily doped in the first type.
  • An epitaxial layer 2 is formed on the drain 1, and the material of the epitaxial layer 2 is lattice-matched with the semiconductor substrate.
  • the material of the epitaxial layer 2 may be, but not limited to, silicon, germanium silicon, carbonization. Silicon or mv semiconductor materials.
  • the epitaxial layer 2 may be a silicon/germanium silicon multilayer composite structure.
  • the epitaxial layer 2 can be either inherently or lightly doped, increasing the high voltage capability of the device and adjusting the on-resistance of the device to limit the power dissipation of the device at high currents.
  • An isolation region 3 is formed in the epitaxial layer 2, and the isolation region 3 may be a field oxide region or a shallow trench isolation (STI). In this embodiment, the field oxide region is used to isolate different active regions.
  • STI shallow trench isolation
  • a buried layer 6 is also formed in the epitaxial layer 2, and the buried layer 6 is lightly doped in the second type.
  • the buried layer 6 is lightly doped in the second type.
  • a source electrode 8 is formed in the buried layer 6, and the source electrode 8 is heavily doped in the second type.
  • a gate dielectric layer 4 is formed over the epitaxial layer 2, and the gate dielectric layer 4 may be any gate dielectric material used in the fabrication of the transistor, and may be, but not limited to, a high K dielectric, silicon dioxide or a material having a work function adjusting function.
  • the gate dielectric layer 4 employs a work function tuning layer capable of adjusting the work function of the epitaxial layer 2.
  • the work function tuning layer may be, but not limited to, Hf0 2
  • the work function tuning layer can be, but is not limited to, a compound of A1.
  • a gate 5 is formed on the gate dielectric layer 4.
  • the gate 5 may be, but not limited to, a polysilicon gate or a metal gate.
  • a source metal contact layer 9 is formed over the source 8, and a drain metal contact layer 11 is formed on the back surface of the semiconductor substrate (ie, under the drain layer 1).
  • the source metal contact layer 9 The material of the interface with the source 8 and the interface of the drain metal contact layer 11 and the drain layer 1 may be a metal semiconductor alloy such as a metal silicide.
  • the tunneling field effect transistor device of the present invention has a vertical structure, and the channel region length is longer than that of a conventional planar tunneling field effect transistor, and the cross-sectional area is also larger than the planar tunneling field effect transistor, thereby enhancing the high voltage resistance of the source and drain of the device. Capabilities, while optimizing the device's characteristics at high currents.
  • the shape of the tunneling field effect transistor may be a graphic composed of a polygon, a circle, a line, and an arc, or a pattern composed of an irregular arc.
  • the tunneling field effect transistor has a diamond shape, thereby increasing the heat dissipation area of the device, improving the heat dissipation capability of the device, and optimizing the device at a large current. Sex.
  • the spacer spacers 7 are formed on the sidewalls of the gate dielectric 4 and the gate 5.
  • a passivation layer 10 is formed over the source metal contact layer 9 and the gate electrode 5, and a passivation layer 10 is formed through the source metal contact layer 9 and the gate electrode, respectively.
  • a plurality of metal interconnections 13 are formed over the passivation layer 10, and the plurality of metal interconnections 13 are connected to the source metal contact layer 9 and the gate electrode 5 through a plurality of contact holes 12.
  • FIGS. 2 through 10 A method of fabricating a tunneling field effect transistor according to an embodiment of the present invention will be specifically described below with reference to FIGS. 2 through 10.
  • the tunneling field effect transistor shown in Fig. 1 can be prepared in accordance with the steps of Figs. Only the n-type tunneling field effect transistor fabricated on the n-type semiconductor substrate will be described herein.
  • the n-type tunneling field effect transistor according to the embodiment of the present invention can be changed correspondingly to change the doping type. can.
  • the method includes the following steps.
  • Step S1 providing a semiconductor substrate in which a first type heavily doped drain layer 1 is formed, as shown in FIG.
  • the semiconductor substrate is a lightly doped n-type semiconductor substrate, and then a heavily doped n-type drain layer 1 is formed by ion implantation and diffusion in the semiconductor substrate.
  • Step S2 An epitaxial layer 2 is formed on the drain layer 1, as shown in FIG.
  • the material of the epitaxial layer 2 may be, but not limited to, silicon, germanium silicon, silicon carbide or a group III-V semiconductor material.
  • the epitaxial layer 2 may be a silicon/germanium silicon multilayer composite structure.
  • the epitaxial layer 2 can be intrinsic or lightly doped, can increase the high voltage resistance of the device, and adjust the on-resistance of the device to limit the power consumption of the device at high current.
  • Step S3 forming an isolation region 3 in the epitaxial layer 2, and the isolation region 3 may be a field oxide region or a shallow trench isolation (STI).
  • the field oxide region is used to isolate different active regions.
  • a protective dielectric layer is deposited on the epitaxial layer 2, and then lithographically etched, masked, masked, and glued to form a photoresist pattern, which is oxidized and engraved under the protection of the photoresist pattern.
  • the material of the protective dielectric layer may be silicon nitride, and the material of the field oxygen region 3 may be silicon dioxide, as shown in FIG.
  • Step S4 A gate dielectric layer 4 is formed over the epitaxial layer 2, and a gate electrode 5 is formed on the gate dielectric layer 4.
  • a gate dielectric layer material is deposited on the epitaxial layer 2, and the gate dielectric layer 4 is formed by coating, photolithography, etching, and de-glue, as shown in FIG.
  • the material of the gate dielectric layer 4 may be, but not limited to, silicon dioxide, hafnium oxide or a material having a work function adjusting function.
  • the gate dielectric layer 4 is a work function tuning layer capable of adjusting the work function of the epitaxial layer 2.
  • the work function tuning layer may be, but not limited to, yttrium oxide.
  • the work function tuning layer may be, but not limited to, an aluminum compound.
  • a gate material is deposited on the gate dielectric layer 4.
  • the gate material may be, but not limited to, a polysilicon gate or a metal gate, and then coated with photoresist, photolithography, etching, and de-glue. , the gate 5 is formed as shown in FIG. 6.
  • Step S5 photolithography, ion implantation in the case of mask masking, diffusion, and annealing to form a second type of lightly doped buried layer 6.
  • a lightly doped n-buried layer 6 is formed in the epitaxial layer 2, as shown in FIG.
  • the method further comprises: forming an isolation spacer 7 on the sidewall of the gate dielectric layer 4 and the gate 5 (ie, the gate stack).
  • a protective dielectric layer may be deposited and dry etched to form isolation sidewalls 7 on the sidewalls of the gate stack.
  • the protective dielectric layer may be silicon dioxide or nitrogen. Silicon oxide.
  • Step S6 photolithography, ion implantation in the case of mask masking, diffusion, and annealing to form a second type of heavily doped source 8.
  • the source 8 is located in the buried layer 6 and exposed to the upper surface of the epitaxial layer 2 as shown in FIG.
  • Step S7 forming a source metal contact layer 9 over the source electrode 8, and forming a drain metal contact layer under the drain layer 1 11, as shown in Figure 10.
  • the source metal contact layer 9 and the drain metal contact layer 11 form an ohmic contact with the source 8 and the drain layer 1, respectively, and the interface of the source metal contact layer 9 with the source 8 and the drain metal contact
  • the material of the interface between the layer 11 and the drain layer 1 may be, but not limited to, a metal semiconductor alloy such as a metal silicide.
  • step S7 the following steps can also be performed:
  • the shape of the tunneling transistor can be a pattern composed of a polygon, a circle, a line and an arc, or a pattern composed of an irregular arc by photolithography.
  • the shape of the tunneling transistor is a diamond. This shape can increase the heat dissipation area of the device, improve the heat dissipation characteristics of the device, and optimize the characteristics of the device at high current.
  • the invention prepares a lightly doped or intrinsic epitaxial layer on the drain, which can increase the high voltage resistance of the device, adjust the on-resistance of the device, limit the power consumption under large current, and prepare the second type non-source near the source.
  • the heavily doped region (ie, the buried layer), and the preparation of the first type of non-heavily doped region (ie, the epitaxial layer) near the drain, can improve the breakdown resistance of the device in the off state.
  • the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” and the like means a specific feature described in connection with the embodiment or example.
  • a structure, material or feature is included in at least one embodiment or example of the invention.
  • the schematic representation of the above terms does not necessarily mean the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Landscapes

  • 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)
  • Manufacturing & Machinery (AREA)
  • Thin Film Transistor (AREA)
  • Insulated Gate Type Field-Effect Transistor (AREA)

Abstract

本发明提供一种隧穿场效应晶体管及其制备方法。该场效应晶体管包括:半导体衬底及形成在其中的漏极层(1),漏极层(1)为第一类型重掺杂;外延层(2),外延层(2)形成在漏极层(1)之上,外延层(2)内形成有隔离区(3);埋层(6),形成于外延层(2)内且为第二类型轻掺杂;源极(8),源极(8)形成于埋层(6)内且暴露于外延层(2)的上表面,源极(8)为第二类型重掺杂;栅介质层(4)和栅极(5),栅介质层(4)形成于外延层(2)之上,栅极(5)形成于栅介质层(4)之上;和源极金属接触层(9)和漏极金属接触层(11),源极金属接触层(9)形成于源极(8)之上,漏极金属接触层(11)形成于漏极层(1)之下。

Description

隧穿场效应晶体管及其制备方法 相关申请的交叉引用
本申请要求 2012年 1 月 12 日提交到中华人民共和国国家知识产权局的中国专利申请 No. 201210009396.7的优先权和权益, 该专利申请的全部内容通过参照并入本文。 技术领域
本发明涉及半导体设计及制造技术领域, 特别涉及一种隧穿场效应晶体管及其制备方 法。 背景技术
对于 MOSFET (金属 -氧化物-半导体场效应晶体管)集成电路, 关态泄露电流随着集成 电路特征尺寸的缩小而迅速上升, 为降低泄露电流, 从而进一步降低器件的功耗, 提高器件 的耐压能力, 与 MOSFET不同工作原理的隧穿晶体管得到了广泛的应用。 目前, 常规隧穿 晶体管为平面结构, 漏极和源极位于半导体衬底的同一个平面, 这种结构的隧穿晶体管耐高 压能力差, 导通电阻较大, 功耗高。 并且器件的形状为规则的四边形, 散热面积较小, 不利 于热量的散出。 因此, 如何提高隧穿晶体管的耐压能力, 提高散热性能, 降低功耗是隧穿晶 体管研制过程中亟需解决的技术问题之一。 发明内容
本发明旨在至少解决上述技术缺陷之一,特别是解决了现有的隧穿场效应晶体管耐高压 能力差、 导通电阻大、 功耗高的缺点。 因此, 提出一种耐高压的隧穿场效应晶体管及其制备 方法。
本发明一方面提供一种隧穿场效应晶体管。 所述隧穿场效应晶体管包括: 半导体衬底以 及形成在其中的漏极层, 所述漏极层为第一类型重掺杂; 外延层, 所述外延层形成在所述漏 极层之上, 所述外延层内形成有隔离区; 埋层, 所述埋层形成于所述外延层内, 所述埋层为 第二类型轻掺杂; 源极, 所述源极形成于所述埋层内, 所述源极为第二类型重掺杂; 栅介质 层和栅极, 所述栅介质层形成于所述外延层之上, 所述栅极形成于所述栅介质层之上; 和源 极金属接触层和漏极金属接触层, 所述源极金属接触层形成于所述源极之上, 所述漏极金属 接触层形成于所述漏极层之下。
在本发明的一个实施例中, 所述外延层的材料包括硅、 锗硅、 碳化硅或 m-v族半导体 材料。
在本发明的一个实施例中, 所述外延层为硅 /锗硅多层复合结构。
在本发明的一个实施例中, 所述外延层为本征的或者轻掺杂的, 能够增加器件的耐高压 能力, 调整器件的导通电阻以限制大电流下的功耗。
在本发明的一个实施例中, 所述隧穿场效应晶体管的形状包括多边形、 圆形、 线形和弧 形组成的图形、 或者不规则弧线组成的图形。
在本发明的一个实施例中, 所述隧穿场效应晶体管的形状为菱形, 可以增大器件的散热 面积, 提高器件的散热能力, 优化器件在大电流下的特性。
在本发明的一个实施例中, 所述栅介质层为功函数调谐层。
在本发明的一个实施例中, 在所述栅介质层和栅极的侧壁上形成有隔离侧墙。
在本发明的一个实施例中,所述源极金属接触层与所述源极的界面和所述漏极金属接触 层与所述漏极层的界面的材料为金属半导体合金。
在本发明的一个实施例中, 所述源极金属接触层和栅极之上形成有钝化层, 所述钝化层 中形成有分别贯通所述钝化层至所述源极金属接触层和栅极的多个接触孔。
在本发明的一个实施例中, 所述钝化层之上形成有多个金属互连, 所述多个金属互连通 过所述多个接触孔与所述源极金属接触层和栅极连接。
根据本发明实施例的隧穿场效应晶体管,在靠近源极的第二类型非重掺杂区域(即埋层) 以及靠近漏极层的第一类型非重掺杂区域(即外延层), 提高了器件在关态下的耐击穿能力, 在开态时由于有栅压的场效应, 表面会形成电子积累或电子反型, 故这两个区域(即埋层和 外延层) 不会影响器件的开态特性。 另外, 本发明实施例的隧穿场效应晶体管为垂直结构, 其沟道区长度比普通平面隧穿场效应晶体管长, 截面积也远大于普通平面隧穿场效应晶体 管, 能够提高器件源漏的耐高电压能力, 优化器件在大电流下的特性。
本发明另一方面提供一种隧穿场效应晶体管的制备方法, 其包括如下步骤: S1 : 提供衬 底, 在所述衬底上形成第一类型重掺杂的漏极层; S2: 在所述漏极层上形成外延层; S3: 在 所述外延层内形成隔离区; S4: 在所述外延层之上形成栅介质层, 在所述栅介质层上形成栅 极; S5: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散、 退火以形成第二类型轻掺杂的 埋层; S6: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散、 退火以形成第二类型重掺杂 的源极; 和 S7: 在所述源极之上形成源极金属接触层, 在所述漏极层之下形成漏极金属接 触层。
在本发明的一个实施例中, 在所述步骤 S5之后具有以下步骤: 在所述栅介质层和栅极 的侧壁上形成隔离侧墙。
在本发明的一个实施例中, 在所述步骤 S7之后具有以下步骤: S8: 在所述源极金属接 触层和栅极之上形成钝化层, 然后光刻, 刻蚀, 在所述钝化层上形成分别贯通至所述源极金 属接触层和栅极的多个接触孔; S9: 在所述钝化层之上形成多个金属互连, 所述多个金属互 连通过所述多个接触孔与所述源极金属接触层和栅极连接。
在本发明的一个实施例中, 所述外延层的材料包括硅、 锗硅、 碳化硅或 m-v族半导体 材料。
在本发明的一个实施例中, 所述外延层为本征的或者轻掺杂的。
在本发明的一个实施例中, 所述隧穿场效应晶体管的形状包括多边形、 圆形、 线形和弧 形组成的图形、 或者不规则弧线组成的图形。
在本发明的一个实施例中, 所述隧穿场效应晶体管的形状为菱形。 在本发明的一个实施例中, 所述栅介质层为功函数调谐层。
在本发明的一个实施例中,所述源极金属接触层与所述源极的界面和所述漏极金属接触 层与所述漏极层的界面的材料为金属半导体合金。
根据本发明实施例的制备方法, 在漏极之上制备低掺杂或本征的外延层, 能够增加器件 的耐高压能力, 调整器件的导通电阻, 限制大电流下的功耗。 并且在靠近源极制备第二类型 非重掺杂的区域(即埋层), 以及靠近漏极层制备第一类型非重掺杂的区域(即外延层), 能 够提高器件在关态下的耐击穿能力。
本发明的附加方面和优点将在下面的描述中部分给出, 部分将从下面的描述中变得明 显, 或通过本发明的实践了解到。 附图说明
本发明的上述和 /或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和 容易理解, 其中:
图 1是本发明实施例的隧穿场效应晶体管的结构示意图;
图 2-10是本发明实施例的隧穿场效应晶体管的制备方法的步骤中形成的隧穿场效应晶 体管的中间状态的结构示意图。
附图标记:
1漏极层; 2外延层; 3隔离区; 4栅介质层; 5栅极;
6埋层; 7隔离侧墙; 8源极; 9源极金属接触层; 10钝化层;
11漏极金属接触层; 12接触孔; 13金属互连。 具体实施方式
下面详细描述本发明的实施例, 所述实施例的示例在附图中示出, 其中自始至终相同或 类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的 实施例是示例性的, 仅用于解释本发明, 而不能理解为对本发明的限制。
下文的公开提供了许多不同的实施例或示例用来实现本发明的不同结构。为了筒化本发 明的公开,下文中对特定示例的部件和设置进行描述。 当然,这些部件和设置仅仅作为举例, 而不在于限制本发明。 此外, 本发明可以在不同示例中重复参考数字和 /或字母。 这种重复 是为了筒化和清楚的目的, 其本身不指示所讨论各种实施例和 /或设置之间的关系。 此外, 本发明提供了的各种特定的工艺和材料的例子,但是本领域普通技术人员可以意识到其他工 艺的可应用性和 /或其他材料的使用。另外, 以下描述的第一特征在第二特征之 "上"的结构可 以包括第一特征和第二特征形成为直接接触的实施例,也可以包括另外的特征形成在第一特 征和第二特征之间的实施例, 这样第一特征和第二特征可能不是直接接触的。
此外, 术语"第一"、 "第二 "仅用于描述目的, 而不能理解为指示或暗示相对重要性或者 隐含指明所指示的技术特征的数量。 由此, 限定有 "第一"、 "第二 "的特征可以明示或者隐含 地包括一个或者更多个该特征。 进一步地, 在本发明的描述中, 除非另有说明, "多个 "的含 义是两个或两个以上。 图 1是本发明实施例的隧穿场效应晶体管的结构示意图, 图中仅仅是 示意的给出了各区域的尺寸, 具体的尺寸可以根据器件参数的要求进行设计。
如图 1所示, 该隧穿场效应晶体管包括: 半导体衬底以及形成在其中的漏极层 1 , 漏极 层 1为第一类型重掺杂; 外延层 2, 外延层 2形成在漏极层 1之上, 外延层 2内形成有隔离 区 3; 埋层 6, 埋层 6形成于外延层 2内, 埋层 6为第二类型轻掺杂; 源极 8, 源极 8形成 于埋层 6内, 源极 8为第二类型重掺杂; 栅介质层 4和栅极 5 , 栅介质层 4形成于外延层 2 之上, 栅极 5形成于栅介质层 4之上; 和源极金属接触层 9和漏极金属接触层 11 , 源极金 属接触层 9形成于源极 8之上, 漏极金属接触层 11形成于漏极层 1之下。
该半导体衬底可以是制备隧穿场效应晶体管的任何半导体衬底, 具体可以是但不限于 硅、 锗硅、 锗、 砷化镓。 在半导体衬底中形成有漏极层 1 , 该漏极层 1为第一类型重掺杂。
在漏极 1之上形成有外延层 2, 该外延层 2的材料与半导体衬底的晶格匹配, 在本实施 方式中, 该外延层 2的材料可以为但不限于硅、 锗硅、 碳化硅或 m-v族半导体材料。 在本 发明的一个实施例中, 外延层 2可以为硅 /锗硅多层复合结构。 优选地, 外延层 2可以为本 征或者轻掺杂的, 能够增加器件的耐高压能力, 调整器件的导通电阻以限制大电流下器件的 功耗。
在外延层 2内形成有隔离区 3 , 该隔离区 3可以为场氧区或浅沟槽隔离 (STI ), 在本实 施方式中, 采用场氧区隔离不同的有源区。
在外延层 2内还形成有埋层 6, 埋层 6为第二类型轻掺杂。 通过形成埋层, 有利于提高 器件在关态下的耐击穿能力,在开态时由于有栅压的作用,表面会形成电子积累或电子反型, 故该区域不会影响器件的开态特性。
在埋层 6内形成有源极 8, 该源极 8为第二类型重掺杂。
在外延层 2之上形成有栅介质层 4, 该栅介质层 4可以是制备晶体管中使用的任何栅介 质材料, 可以为但不限于高 K介质, 二氧化硅或具有功函数调节功能的材料, 在本实施方 式中, 栅介质层 4采用能够调节外延层 2的功函数的功函数调谐层, 对于 n型外延层, 功函 数调谐层可以为但不限于 Hf02, 对于 p型外延层, 功函数调谐层可以为但不限于 A1的化合 物。 在栅介质层 4之上形成有栅极 5 , 在本实施方式中, 栅极 5可以为但不限于多晶硅栅极 或金属栅极。
在源极 8之上形成有源极金属接触层 9, 在半导体衬底背面 (即漏极层 1之下)形成有 漏极金属接触层 11 , 在本实施方式中, 源极金属接触层 9与源极 8的界面和漏极金属接触 层 11与漏极层 1的界面的材料可以为金属半导体合金, 如金属硅化物。
本发明的隧穿场效应晶体管器件为垂直结构,其沟道区长度比传统的平面隧穿场效应晶 体管长, 截面积也大于平面隧穿场效应晶体管, 从而增强器件源漏极的耐高电压能力, 同时 优化器件在大电流下的特性。
在本实施方式中, 隧穿场效应晶体管的形状可以为多边形、 圆形、 线形和弧形组成的图 形、 或者不规则弧线组成的图形。 在本发明的一种优选的实施方式中, 该隧穿场效应晶体管 的形状为菱形, 从而增大器件的散热面积, 提高器件的散热能力, 优化器件在大电流下的特 性。
在本实施方式中, 栅介质 4和栅极 5的侧壁上形成有隔离侧墙 7。 在源极金属接触层 9 和栅极 5之上形成有钝化层 10, 在钝化层 10中形成有分别贯通至源极金属接触层 9和栅极
5的接触孔 12。 在钝化层 10之上形成有引多个金属互连 13 , 多个金属互连 13通过多个接 触孔 12与源极金属接触层 9和栅极 5连接。
下面结合附图 2至 10具体描述本发明实施例的隧穿场效应晶体管的制备方法。按照图 2 至 10的步骤能够制备图 1中所示的隧穿场效应晶体管。 在此仅仅描述在 n型半导体衬底上 制作的 n型隧穿场效应晶体管, 对于 p型隧穿场效应晶体管, 可以参照本发明实施例的 n型 隧穿场效应晶体管相应改变掺杂类型即可。 该方法包括如下步骤。
步骤 S1 : 提供半导体衬底, 在半导体衬底中形成第一类型重掺杂的漏极层 1 , 如图 2所 示。 在本实施例中, 半导体衬底为轻掺杂的 n型半导体衬底, 然后在半导体衬底中经过离子 注入、 扩散形成重掺杂的 n型的漏极层 1。
步骤 S2: 在漏极层 1上形成外延层 2, 如图 3所示。 在本实施方式中, 该外延层 2的材 料可以为但不限于硅、 锗硅、 碳化硅或 III-V族半导体材料。 在本发明的一个实施例中, 外 延层 2可以为硅 /锗硅多层复合结构。 优选地, 外延层 2可以为本征或者轻掺杂的, 能够增 加器件的耐高压能力, 调整器件的导通电阻以限制大电流下器件的功耗。
步骤 S3: 在外延层 2内形成隔离区 3 , 该隔离区 3可以为场氧区或浅沟槽隔离 (STI ), 在本实施方式中, 采用场氧区隔离不同的有源区。 具体地, 在外延层 2上淀积保护介质层, 然后光刻,在掩膜掩蔽的情况下进行刻蚀,去胶,形成光刻胶图形,在光刻胶图形的保护下, 氧化、 刻蚀以去掉保护介质层, 形成场氧区 3 , 如图 4所示, 在本实施方式中, 保护介质层 的材料可以为氮化硅, 场氧区 3的材料可以为二氧化硅。
步骤 S4: 在外延层 2之上形成栅介质层 4, 在栅介质层 4上形成栅极 5。 具体地, 在外 延层 2上淀积栅介质层材料, 经过涂胶、 光刻、 刻蚀、 去胶, 形成栅介质层 4, 如图 5所示。 栅介质层 4的材料可以为但不限于二氧化硅、 氧化铪或具有功函数调节功能的材料, 在本实 施方式中, 栅介质层 4采用能够调节外延层 2的功函数的功函数调谐层, 对于 n型外延层, 功函数调谐层可以为但不限于氧化铪, 对于 p型外延层, 功函数调谐层可以为但不限于铝的 化合物。 然后, 在栅介质层 4上淀积栅极材料, 在本实施方式中, 栅极材料可以为但不限于 多晶硅栅极或金属栅极, 然后涂光刻胶、 光刻、 刻蚀、 去胶, 形成栅极 5 , 如图 6所示。
步骤 S5: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散, 退火以形成第二类型轻 掺杂的埋层 6。 本实施例中, 在外延层 2中形成轻掺杂的 n-埋层 6, 如图 7所示。
在本发明实施例中, 在步骤 S5之后还包括: 在栅介质层 4和栅极 5 (即栅堆叠) 的侧 壁上形成隔离侧墙 7。 具体地, 可以淀积保护介质层, 干法刻蚀, 以在栅堆叠侧壁上形成隔 离侧墙 7, 如图 8所示, 在本实施方式中, 保护介质层可以为二氧化硅或者氮氧化硅。
步骤 S6: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散, 退火以形成第二类型重 掺杂的源极 8。 源极 8位于埋层 6内并暴露于外延层 2的上表面, 如图 9所示。
步骤 S7: 在源极 8之上形成源极金属接触层 9, 在漏极层 1之下形成漏极金属接触层 11 , 如图 10所示。 在本实施方式中, 源极金属接触层 9和漏极金属接触层 11分别与源极 8 和漏极层 1形成欧姆接触, 源极金属接触层 9与源极 8的界面和漏极金属接触层 11与漏极 层 1的界面的材料可以为但不限于金属半导体合金, 如金属硅化物。
在步骤 S7之后还可以具有以下步骤:
S8: 在源极金属接触层 9和栅极 5之上形成钝化层 10, 然后光刻, 刻蚀, 以在钝化层 中形成分别贯通至源极金属接触层 9和栅极 5的多个接触孔 12;
S9: 在钝化层 10之上形成多个金属互连 13 , 多个金属互连 13通过多个接触孔 12与源 极金属接触层 9和栅极 5连接, 如图 1所示。
本发明中可以通过光刻使隧穿晶体管的形状可以为多边形、 圆形、 线形和弧形组成的图 形、 或者不规则弧线组成的图形, 在本实施方式中, 隧穿晶体管的形状为菱形, 这种形状能 够增大器件的散热面积, 提高器件的散热特性, 优化器件在大电流下的特性。
本发明在漏极之上制备轻掺杂或本征的外延层, 能够增加器件的耐高压能力, 调整器件 的导通电阻, 限制大电流下的功耗, 在靠近源极制备第二类型非重掺杂的区域(即埋层), 以及在靠近漏极制备第一类型非重掺杂的区域(即外延层), 能够提高器件在关态下的耐击 穿能力。
在本说明书的描述中, 参考术语"一个实施例"、 "一些实施例"、 "示例"、 "具体示例"、 或"一些示例"等的描述意指结合该实施例或示例描述的具体特征、 结构、 材料或者特点包含 于本发明的至少一个实施例或示例中。在本说明书中, 对上述术语的示意性表述不一定指的 是相同的实施例或示例。 而且, 描述的具体特征、 结构、 材料或者特点可以在任何的一个或 多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本发明的实施例, 本领域的普通技术人员可以理解: 在不脱离本 发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型, 本发明的 范围由权利要求及其等同物限定。

Claims

权利要求书
1、 一种隧穿场效应晶体管, 其特征在于, 包括:
半导体衬底以及形成在其中的漏极层, 所述漏极层为第一类型重掺杂;
外延层, 所述外延层形成在所述漏极层之上, 所述外延层内形成有隔离区; 埋层, 所述埋层形成于所述外延层内, 所述埋层为第二类型轻掺杂;
源极, 所述源极形成于所述埋层内, 所述源极为第二类型重掺杂;
栅介质层和栅极, 所述栅介质层形成于所述外延层之上, 所述栅极形成于所述栅介质层 之上; 和
源极金属接触层和漏极金属接触层, 所述源极金属接触层形成于所述源极之上, 所述漏 极金属接触层形成于所述漏极层之下。
2、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述外延层的材料包括硅、 锗硅、 碳化硅或 III-V族半导体材料。
3、 如权利要求 2所述的隧穿场效应晶体管, 其特征在于, 所述外延层为硅 /锗硅多层复 合结构。
4、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述外延层为本征的或者轻 掺杂的。
5、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述隧穿场效应晶体管的形 状包括多边形、 圆形、 线形和弧形组成的图形、 或者不规则弧线组成的图形。
6、 如权利要求 5所述的隧穿场效应晶体管, 其特征在于, 所述隧穿场效应晶体管的形 状为菱形。
7、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述栅介质层为功函数调谐 层。
8、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 在所述栅介质层和栅极的侧 壁上形成有隔离侧墙。
9、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述源极金属接触层与所述 源极的界面和所述漏极金属接触层与所述漏极层的界面的材料为金属半导体合金。
10、 如权利要求 1所述的隧穿场效应晶体管, 其特征在于, 所述源极金属接触层和栅极 之上形成有钝化层,所述钝化层中形成有贯通所述钝化层分别至所述源极金属接触层和栅极 的多个接触孔。
11、 如权利要求 10所述的隧穿场效应晶体管, 其特征在于, 所述钝化层之上形成有多 个金属互连, 所述多个金属互连通过所述多个接触孔与所述源极金属接触层和栅极连接。
12、 一种隧穿场效应晶体管的制备方法, 其特征在于, 包括如下步骤:
S1 提供半导体衬底, 在所述半导体衬底中形成第一类型重掺杂的漏极层;
S2 在所述漏极层上形成外延层;
S3 在所述外延层内形成隔离区; S4: 在所述外延层之上形成栅介质层, 在所述栅介质层上形成栅极;
S5: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散、 退火以形成第二类型轻掺杂的 埋层;
S6: 光刻, 在掩膜掩蔽的情况下进行离子注入, 并扩散、 退火以形成第二类型重掺杂的 源极; 和
S7: 在所述源极之上形成源极金属接触层, 在所述漏极层之下形成漏极金属接触层。
13、 如权利要求 12所述的制备方法, 其特征在于, 在所述步骤 S5之后具有以下步骤: 在所述栅介质层和栅极的侧壁上形成隔离侧墙。
14、 如权利要求 12所述的制备方法, 其特征在于, 在所述步骤 S7之后具有以下步骤: S8: 在所述源极金属接触层和栅极之上形成钝化层, 然后光刻, 刻蚀, 在所述钝化层中 形成分别贯通至所述源极金属接触层和栅极的多个接触孔;
S9:在所述钝化层之上形成多个金属互连,所述多个金属互连通过所述多个接触孔与所 述源极金属接触层和栅极连接。
15、 如权利要求 12所述的制备方法, 其特征在于, 所述外延层的材料包括硅、 锗硅、 碳化硅或 m-v族半导体材料。
16、 如权利要求 12所述的制备方法, 其特征在于, 所述外延层为本征的或者轻掺杂的。
17、 如权利要求 12所述的制备方法, 其特征在于, 所述隧穿场效应晶体管的形状包括 多边形、 圆形、 线形和弧形组成的图形、 或者不规则弧线组成的图形。
18、 如权利要求 17所述的制备方法, 其特征在于, 所述隧穿场效应晶体管的形状为菱 形。
19、 如权利要求 12所述的制备方法, 其特征在于, 所述栅介质层为功函数调谐层。
20、 如权利要求 12所述的制备方法, 其特征在于, 所述源极金属接触层与所述源极的 界面和所述漏极金属接触层与所述漏极层的界面的材料为金属半导体合金。
PCT/CN2012/081083 2012-01-12 2012-09-06 隧穿场效应晶体管及其制备方法 WO2013104193A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/695,341 US8803225B2 (en) 2012-01-12 2012-09-06 Tunneling field effect transistor having a lightly doped buried layer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2012100093967A CN102544104A (zh) 2012-01-12 2012-01-12 一种耐高压的隧穿晶体管及其制备方法
CN201210009396.7 2012-01-12

Publications (1)

Publication Number Publication Date
WO2013104193A1 true WO2013104193A1 (zh) 2013-07-18

Family

ID=46350559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/081083 WO2013104193A1 (zh) 2012-01-12 2012-09-06 隧穿场效应晶体管及其制备方法

Country Status (2)

Country Link
CN (1) CN102544104A (zh)
WO (1) WO2013104193A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102544104A (zh) * 2012-01-12 2012-07-04 清华大学 一种耐高压的隧穿晶体管及其制备方法
CN103199113B (zh) * 2013-03-20 2018-12-25 京东方科技集团股份有限公司 薄膜晶体管及其制备方法、阵列基板、显示装置
CN104425593B (zh) * 2013-08-20 2017-12-29 中芯国际集成电路制造(上海)有限公司 隧道场效应晶体管及其形成方法
WO2018094711A1 (zh) * 2016-11-26 2018-05-31 华为技术有限公司 隧穿场效应晶体管及其制作方法
CN109496363A (zh) * 2017-07-13 2019-03-19 华为技术有限公司 隧穿场效应晶体管器件制造方法及隧穿场效应晶体管器件

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040079989A1 (en) * 2002-10-11 2004-04-29 Nissan Motor Co., Ltd. Insulated gate tunnel-injection device having heterojunction and method for manufacturing the same
CN101933146A (zh) * 2008-01-31 2010-12-29 株式会社东芝 碳化硅半导体器件
CN102544104A (zh) * 2012-01-12 2012-07-04 清华大学 一种耐高压的隧穿晶体管及其制备方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001077354A (ja) * 1999-08-31 2001-03-23 Miyazaki Oki Electric Co Ltd 縦型絶縁ゲート半導体装置
JP3906184B2 (ja) * 2003-06-11 2007-04-18 株式会社東芝 半導体装置およびその製造方法
JP4939760B2 (ja) * 2005-03-01 2012-05-30 株式会社東芝 半導体装置
ITTO20060785A1 (it) * 2006-11-02 2008-05-03 St Microelectronics Srl Dispositivo mos resistente alla radiazione ionizzante
CN1964070A (zh) * 2006-11-15 2007-05-16 四川绵阳信益科技有限公司 多晶硅esd结构保护的垂直双扩散金属氧化物半导体功率器件

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040079989A1 (en) * 2002-10-11 2004-04-29 Nissan Motor Co., Ltd. Insulated gate tunnel-injection device having heterojunction and method for manufacturing the same
CN101933146A (zh) * 2008-01-31 2010-12-29 株式会社东芝 碳化硅半导体器件
CN102544104A (zh) * 2012-01-12 2012-07-04 清华大学 一种耐高压的隧穿晶体管及其制备方法

Also Published As

Publication number Publication date
CN102544104A (zh) 2012-07-04

Similar Documents

Publication Publication Date Title
US8658503B2 (en) Semiconductor device and method of fabricating the same
WO2011027540A1 (ja) 半導体素子およびその製造方法
US11462628B2 (en) Semiconductor device, and manufacturing method thereof
TWI436479B (zh) 一種低阻高壓mosfet器件及其製造方法
TWI570917B (zh) 溝槽式功率金氧半場效電晶體與其製造方法
US20100148254A1 (en) Power semiconductor device and method of manufacturing the same
JP2014135494A (ja) 二重並列チャネル構造を持つ半導体素子及びその半導体素子の製造方法
CN111048420B (zh) 横向双扩散晶体管的制造方法
US20120289004A1 (en) Fabrication method of germanium-based n-type schottky field effect transistor
WO2013104193A1 (zh) 隧穿场效应晶体管及其制备方法
CN104377244A (zh) 一种降低ldmos导通电阻的器件结构
WO2013120344A1 (zh) 隧穿场效应晶体管及其制备方法
TWI455318B (zh) 高壓半導體裝置及其製造方法
JP4948784B2 (ja) 半導体装置及びその製造方法
US8900943B2 (en) Vertical power MOSFET and IGBT fabrication process with two fewer photomasks
JP3344381B2 (ja) 半導体装置及びその製造方法
US9059268B2 (en) Tunneling field effect transistor and method for fabricating the same
JP2004158680A (ja) 半導体装置およびその製造方法
CN108695387B (zh) Mosfet、mosfet制备方法以及电子设备
US8803225B2 (en) Tunneling field effect transistor having a lightly doped buried layer
TW202021132A (zh) 橫向擴散金氧半導體裝置
TWI458022B (zh) 低閘極電荷的溝槽式功率半導體製造方法
WO2019128555A1 (zh) 一种半导体器件的制造方法和集成半导体器件
JP2004146465A (ja) 炭化珪素半導体装置及びその製造方法
CN115881778B (zh) 横向双扩散场效应晶体管、制作方法、芯片及电路

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 13695341

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12864729

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12864729

Country of ref document: EP

Kind code of ref document: A1