WO2018000223A1 - 一种绝缘栅双极型晶体管结构及其制造方法 - Google Patents
一种绝缘栅双极型晶体管结构及其制造方法 Download PDFInfo
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- WO2018000223A1 WO2018000223A1 PCT/CN2016/087583 CN2016087583W WO2018000223A1 WO 2018000223 A1 WO2018000223 A1 WO 2018000223A1 CN 2016087583 W CN2016087583 W CN 2016087583W WO 2018000223 A1 WO2018000223 A1 WO 2018000223A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
- H10D12/411—Insulated-gate bipolar transistors [IGBT]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
- H10D12/01—Manufacture or treatment
- H10D12/031—Manufacture or treatment of IGBTs
- H10D12/032—Manufacture or treatment of IGBTs of vertical IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D12/00—Bipolar devices controlled by the field effect, e.g. insulated-gate bipolar transistors [IGBT]
- H10D12/411—Insulated-gate bipolar transistors [IGBT]
- H10D12/441—Vertical IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/102—Constructional design considerations for preventing surface leakage or controlling electric field concentration
- H10D62/103—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices
- H10D62/105—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE]
- H10D62/106—Constructional design considerations for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse-biased devices by having particular doping profiles, shapes or arrangements of PN junctions; by having supplementary regions, e.g. junction termination extension [JTE] having supplementary regions doped oppositely to or in rectifying contact with regions of the semiconductor bodies, e.g. guard rings with PN or Schottky junctions
- H10D62/107—Buried supplementary regions, e.g. buried guard rings
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/113—Isolations within a component, i.e. internal isolations
- H10D62/115—Dielectric isolations, e.g. air gaps
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/113—Isolations within a component, i.e. internal isolations
- H10D62/115—Dielectric isolations, e.g. air gaps
- H10D62/116—Dielectric isolations, e.g. air gaps adjoining the input or output regions of field-effect devices, e.g. adjoining source or drain regions
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/124—Shapes, relative sizes or dispositions of the regions of semiconductor bodies or of junctions between the regions
- H10D62/126—Top-view geometrical layouts of the regions or the junctions
- H10D62/127—Top-view geometrical layouts of the regions or the junctions of cellular field-effect devices, e.g. multicellular DMOS transistors or IGBTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/23—Electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. sources, drains, anodes or cathodes
- H10D64/231—Emitter or collector electrodes for bipolar transistors
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/393—Body regions of DMOS transistors or IGBTs
Definitions
- FIG. 1 shows a cross section of a prior art IGBT device 100.
- Device 100 is a MOS controlled PNP bipolar junction transistor.
- the MOS channel is composed of an n + emitter region (112), a p-type base region (113), an n - drift region (114), a gate dielectric (130), and a gate electrode (121), wherein the p-type base region (113) passes
- the p+ diffusion region (111) is connected to the emitter (120).
- the turn-on or turn-off of the device is controlled by the MOS channel.
- the second conductive type collector region has a doping concentration of from 1 ⁇ 10 18 cm -3 to 1 ⁇ 10 21 cm -3 .
- the second conductive type collector region has a depth of between 0.1 ⁇ m and 1 ⁇ m.
- the buried oxide is completely composed of the floating region, the first conductive type drift region, the second conductive type base region, the contact region, and the emitter region. Area surrounded.
- the emission region has a doping concentration of from 1 ⁇ 10 19 cm -3 to 1 ⁇ 10 21 cm -3 .
- a method of fabricating an IGBT structure includes the following steps:
- the gate dielectric is formed by oxidizing a surface of the wafer and then depositing a high dielectric constant dielectric.
- FIG. 2 is an explanatory diagram showing an on-state electron-hole plasma distribution curve and an ideal distribution curve in a drift region of the device 100;
- Figure 4 is a top plan view of the device 300 previously shown in Figure 3;
- FIG. 10 shows the formation of an interlayer dielectric (331);
- the function of the buried oxide (332) is to electrically separate the p-type floating region (317) from the p-type base region (313). Therefore, a thin buried oxide (332) is preferred in order to reduce processing time and cost of manufacturing.
- the thickness of the buried oxide (332) is preferably between 20 nm and 200 nm.
- the buried oxide (332) should have a specific p-type base region. (313), a width of the p + contact region (311) and the width of the n + emitter region (312) being relatively larger.
- Figure 12 shows the formation of an emitter (321) and an n - drift region (314).
- a metal is deposited and the contact hole (340) is filled with metal.
- the metal is patterned to form an emitter (321).
- the substrate wafer is thinned from the back side to form an n - drift region (314).
- the thinning process is usually mechanical grinding followed by chemical etching.
- the order of the above steps can be adjusted according to the manufacturing capabilities. For example, if the ions in the n-type buffer (315) and the p + collector region (316) need to be fully activated without the use of an expensive laser annealing system, then the contact hole (340) and the emitter (321) The formation can be placed after the formation of the n-type buffer (315) and the p + collector region (316). However, if the contact hole (340) and the emitter (321) are formed after thinning the wafer, a lithography system suitable for a thin wafer is required.
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- Electrodes Of Semiconductors (AREA)
- Thin Film Transistor (AREA)
Abstract
Description
Claims (19)
- 一种绝缘栅双极型晶体管结构,其特征在于,其包括位于底部的集电极(322);位于所述集电极(322)顶上的第二导电型集电区(316);位于所述第二导电型集电区(316)顶上的第一导电型缓冲区(315);位于所述第一导电型缓冲区(315)顶上的第一导电型漂移区(314);位于第一导电型漂移区(314)上的第二导电类型的浮置区(317);位于所述浮置区(317)顶上的掩埋氧化物(332);位于所述掩埋氧化物(332)顶上的第二导电型基区(313)、接触区(311)和发射区(312),所述的接触区(311)和发射区(312)交替排列,所述的第二导电型基区(313)与接触区(311)和发射区(312)并列排列;位于发射区(312)和所述的接触区(311)的顶部并短接所述发射区(312)和所述接触区(311)的发射极(321);位于所述的第二导电型基区(313)上方并覆盖所述的第二导电型基区(313)的柵电介质(330),并且因此形成从所述发射区(312)到所述漂移区(314)的电子沟道;位于所述栅电介质(330)顶上的栅电极(320),将所述栅电极(320)与所述发射极(321)隔离的层间电介质(331);所述的柵电介质(330)、浮置区(317)、掩埋氧化物(332)和第二导电型基区(313)均和第一导电型漂移区(314)临近。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第二导电型集电区(316)具有从1×1018cm-3到1×1021cm-3的掺杂浓度。
- 根据权利要求1所述的IGBT结构,其特征在于,所述第二导电型集电区(316)具有在0.1μm与1μm之间的深度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第一导电型漂移区(314)具有从1×1012cm-3到1×1015cm-3的掺杂浓度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第一导电型漂移区(314)具有在30μm与400μm之间的长度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第二导电类型浮置区(317)的掺杂浓度至少比所述第一导电型漂移区(314)的掺杂浓度高10倍。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述浮置区(317)具有在0.3μm与3μm之间的深度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第一导电型缓冲区(315)具有比所述第一导电型漂移区(314)的掺杂浓度相对更高的掺杂浓度以及比所述第一导电型漂移区(314)的长度更短的长度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述掩埋氧化物(332)具有在20nm与200nm之间的厚度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述掩埋氧化物(332)完全被所述的浮置区(317)、所述的第一导电型漂移区(314)、所述的第二导电型基区(313)、所述接触区(311)和所述发射区(312)所构成的半导体区域包围。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述第二导电型基区(313)具有在5nm与20nm之间的厚度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述接触区(311)具有从1×1019cm-3到1×1021cm-3的掺杂浓度。
- 根据权利要求1所述的绝缘栅双极型晶体管结构,其特征在于,所述发 射区(312)具有从1×1019cm-3到1×1021cm-3的掺杂浓度。
- 一种制造IGBT结构的方法,其特征在于,包括如下步骤:从轻掺杂衬底晶圆开始,在所述晶圆的表面上形成图案化氧化物层(333),将所述图案化氧化物层(333)用作硬掩膜来将氧离子注入到所述晶圆中,在高温下退火以形成掩埋氧化物(332),通过湿法蚀刻去除所述的硬掩膜氧化物(333),通过光刻法、注入和退火来形成所述第二导电型基区(313)和所述第二导电型浮置区(317),形成所述柵电介质(330),通过多晶硅淀积和图案化形成栅电极(320),通过光刻法、注入和退火形成接触区(311),通过光刻法、注入和退火形成发射区(312),淀积层间电介质(331),通过图案化所述层间电介质(331)形成接触孔(340),通过金属淀积和图案化形成发射极(321),减薄所述衬底晶圆以形成所述第一导电型漂移区(314),通过背面注入和退火形成第一导电型缓冲区(315),通过背面注入和退火形成第二导电型集电区(316),通过在背部金属淀积并通过合金来形成集电极(322)。
- 一种制造IGBT结构的方法,其特征在于,包括:从轻掺杂衬底晶圆开始,在所述晶圆的表面上形成图案化氧化物层(333),将所述图案化氧化物层(333)用作硬掩膜来将氧离子注入所述晶圆中,在高温下退火以形成掩埋氧化物(332),通过湿法蚀刻去除所述硬掩膜氧化物(333),通过光刻法、注入和退火来形成所述第二导电型基区(313)和所述第二导电型浮置区(317),形成所述栅电介质(330),通过多晶硅淀积和图案化形成栅电极(320),通过光刻法、注入和退火形成接触区(311),通过光刻法、注入和退火形成发射区(312),淀积层间电介质(331),减薄所述衬底晶圆以形成所述第一导电型漂移区(314),通过背面注入和退火形成第一导电型缓冲区(315),通过背面注入和退火形成第二导电型集电区(316),通过图案化所述层间电介质(331)形成接触孔(340),通过金属淀积和图案化形成发射极(321),通过在背部金属淀积并通过合金来形成集电极(322)。
- 根据权利要求14或15所述的制造方法,其特征在于,其中,所述第二导电型基区(313)和所述第二导电型浮置区(317)被单次注入。
- 根据权利要求14或15所述的制造方法,其特征在于,其中,所述第二导电型基区(313)和所述第二导电型浮置区(317)被多次注入。
- 根据权利要求14和15所述的制造方法,其特征在于,其中,所述栅电介质(330)是通过氧化所述晶圆的表面形成的。
- 根据权利要求14和15所述的制造方法,其特征在于,其中,所述栅电 介质(330)是通过氧化所述晶圆的表面并且然后淀积高介电常数电介质形成的。
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| US15/571,230 US10692995B2 (en) | 2016-06-29 | 2016-06-29 | Insulated-gate bipolar transistor structure and method for manufacturing the same |
| PCT/CN2016/087583 WO2018000223A1 (zh) | 2016-06-29 | 2016-06-29 | 一种绝缘栅双极型晶体管结构及其制造方法 |
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| CN113066867A (zh) * | 2021-03-15 | 2021-07-02 | 无锡新洁能股份有限公司 | 高可靠的碳化硅mosfet器件及其工艺方法 |
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| CN110690278B (zh) * | 2019-10-22 | 2023-02-03 | 上海睿驱微电子科技有限公司 | 一种绝缘栅双极型晶体管及其制备方法 |
| CN112864234B (zh) * | 2019-11-27 | 2022-04-15 | 苏州东微半导体股份有限公司 | Igbt功率器件 |
| CN113270492A (zh) * | 2021-05-13 | 2021-08-17 | 重庆邮电大学 | 一种沟槽型GaN绝缘栅双极型晶体管 |
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| JP5045441B2 (ja) * | 2005-03-03 | 2012-10-10 | 富士電機株式会社 | 半導体装置およびその製造方法 |
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- 2016-06-29 WO PCT/CN2016/087583 patent/WO2018000223A1/zh not_active Ceased
- 2016-06-29 US US15/571,230 patent/US10692995B2/en active Active
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| JP2005135979A (ja) * | 2003-10-28 | 2005-05-26 | Shindengen Electric Mfg Co Ltd | 絶縁ゲート型バイポーラトランジスタ及びその製造方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113066867A (zh) * | 2021-03-15 | 2021-07-02 | 无锡新洁能股份有限公司 | 高可靠的碳化硅mosfet器件及其工艺方法 |
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| US10692995B2 (en) | 2020-06-23 |
| US20180226500A1 (en) | 2018-08-09 |
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