WO2018113542A1 - 可重构环形天线中基于台状有源区pin二极管串的制备方法 - Google Patents
可重构环形天线中基于台状有源区pin二极管串的制备方法 Download PDFInfo
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- WO2018113542A1 WO2018113542A1 PCT/CN2017/115358 CN2017115358W WO2018113542A1 WO 2018113542 A1 WO2018113542 A1 WO 2018113542A1 CN 2017115358 W CN2017115358 W CN 2017115358W WO 2018113542 A1 WO2018113542 A1 WO 2018113542A1
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 110
- 239000000758 substrate Substances 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000005530 etching Methods 0.000 claims abstract description 29
- 238000011065 in-situ storage Methods 0.000 claims abstract description 23
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 14
- 239000011241 protective layer Substances 0.000 claims description 43
- 239000010410 layer Substances 0.000 claims description 36
- 238000000151 deposition Methods 0.000 claims description 33
- 238000000206 photolithography Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 238000001039 wet etching Methods 0.000 claims description 13
- 238000001312 dry etching Methods 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 6
- 238000001459 lithography Methods 0.000 claims description 5
- 238000002161 passivation Methods 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 229910021332 silicide Inorganic materials 0.000 claims description 4
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
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- 229910004298 SiO 2 Inorganic materials 0.000 description 13
- 238000005229 chemical vapour deposition Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
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- 229910052581 Si3N4 Inorganic materials 0.000 description 7
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66083—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by variation of the electric current supplied or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. two-terminal devices
- H01L29/6609—Diodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/868—PIN diodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Definitions
- the present invention relates to the field of semiconductor device manufacturing technology, and in particular, to a method for fabricating a PIN diode string based on a mesa active region in a reconfigurable loop antenna.
- the researchers proposed a new antenna concept - a plasma antenna, which is a radio frequency antenna that directs plasma as a medium for electromagnetic radiation.
- the plasma antenna can change the plasma density to change the instantaneous bandwidth of the antenna and has a large dynamic range.
- the antenna frequency, beam width, power, gain, and direction can also be adjusted by changing the plasma resonance, impedance, and density.
- the plasma antenna is negligible in the state of no excitation, and the antenna is only excited in the short time of communication transmission or reception, which improves the concealability of the antenna.
- Solid-state plasmas are generally present in semiconductor devices and do not need to be wrapped with a dielectric tube like gaseous plasma for better safety and stability.
- Theoretical studies have found that when a PIN diode is applied with a DC bias, the DC current forms a solid-state plasma composed of free carriers (electrons and holes) on the surface.
- the plasma has a metal-like characteristic, that is, it has a reflection on the electromagnetic wave. Its reflection characteristics are closely related to the microwave transmission characteristics, concentration and distribution of surface plasmons.
- the present invention provides a method for preparing a PIN diode string based on a mesa active region in a reconfigurable loop antenna.
- a method for fabricating a PIN diode string based on a field-shaped active region in a reconfigurable loop antenna the PIN diode is used to fabricate a reconfigurable loop antenna
- the loop antenna includes: a semiconductor Substrate (1); dielectric plate (2); first PIN diode ring (3), second PIN diode ring (4), first DC bias line (5) and second DC bias line (6) Both are disposed on the semiconductor substrate (1); a coupled feed (7) is disposed on the dielectric plate (2).
- the preparation method comprises the steps of:
- step (b) comprises:
- step (b) the method further includes:
- step (c) comprises:
- step (c4) comprises:
- step (c8) comprises:
- step (g) comprises:
- the first plasma PIN diode ring (3) comprises a first plasma PIN diode string (8)
- the second plasma PIN diode ring (4) comprises a second plasma PIN diode string ( 9)
- the circumference of the first plasma PIN diode ring (3) and the second plasma PIN diode ring (4) is equal to the wavelength of the electromagnetic wave of the signal to be received.
- a first DC bias line (5) and a second portion are disposed at both ends of the first plasma PIN diode string (8) and the second plasma PIN diode string (9).
- a DC bias line (6), the first DC bias line (5) and the second DC bias line (6) are fabricated on the semiconductor substrate using heavily doped polysilicon (1).
- the coupled feed (7) is fabricated on the dielectric plate (2) and has a metal microstrip patch (10) on its upper surface and a metal ground plate on the lower surface (11).
- the metal microstrip patch (10) includes a main branch section (12), a first branching section (13), and a second branching section (14).
- the PIN diode plasma reconfigurable antenna may be an array of SOI-based PIN diodes arranged in an array, and selectively connected by a PIN diode in an external control array to form a dynamic solid-state plasma stripe and have an antenna function.
- the antenna has a transmitting and receiving function for a specific electromagnetic wave, and the antenna can change the shape and distribution of the solid plasma strip by selective conduction of the PIN diode in the array, thereby realizing antenna reconstruction, and is important in defense communication and radar technology. Application prospects.
- FIG. 1 is a schematic structural diagram of a reconfigurable loop antenna according to an embodiment of the present invention.
- FIG. 2 is a flow chart of a method for fabricating a PIN diode string based on a mesa active region in a reconfigurable loop antenna according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a semiconductor substrate of a reconfigurable loop antenna according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram of a dielectric board of a loop antenna according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a PIN diode based on a mesa active region in a reconfigurable loop antenna according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a PIN diode string based on a mesa active region in a reconfigurable loop antenna according to an embodiment of the present invention
- FIGS. 7a-7s are schematic diagrams showing a method of fabricating a PIN diode based on a mesa active region in another reconfigurable loop antenna according to an embodiment of the present invention
- FIG. 8 is a schematic structural diagram of a device of a PIN diode based on a mesa active region in another reconfigurable loop antenna according to an embodiment of the present invention.
- the present invention proposes a method of fabricating a PIN diode based on a mesa active region suitable for forming a reconfigurable loop antenna.
- the PIN diode may be a lateral PIN diode formed by silicon-on-insulator (SOI) on an insulating substrate.
- SOI silicon-on-insulator
- a direct current may form free carriers on the surface (electron and empty).
- FIG. 2 is a flowchart of a method for fabricating a PIN diode string based on a mesa active region in a reconfigurable loop antenna according to an embodiment of the present invention.
- the method is applicable to preparing a SOI-based lateral PIN diode, and the method is applicable to A PIN diode based on a mesa active region is mainly used to fabricate a reconfigurable loop antenna.
- the method comprises the following steps:
- the reason why the SOI substrate is used is that for the solid plasma antenna, since it requires good microwave characteristics, the PIN diode needs to have a good carrier, that is, a solid plasma, in order to meet this demand.
- silica SiO 2
- SOI is capable of confining carriers, ie, solid state plasma, to the top layer of silicon, it is preferred to use SOI as the substrate for the PIN diode.
- step (b) comprises:
- step (b) the method further includes:
- step (c) comprises:
- the preparation process of the P zone and the N zone of the conventional PIN diode is formed by an implantation process, which requires a large injection dose and energy, is high in equipment requirements, and is incompatible with the existing process;
- Using the diffusion process although the junction depth is deep, the area of the P region and the N region is large, the integration degree is low, and the doping concentration is not uniform, which affects the electrical properties of the PIN diode, resulting in poor controllability of the concentration and distribution of the solid plasma. .
- In-situ doping can avoid the adverse effects caused by ion implantation, etc., and can control the doping concentration of the material by controlling the gas flow rate, which is more favorable for obtaining a steep doping interface, thereby obtaining better device performance.
- step (c4) comprises:
- step (c8) comprises:
- step (g) comprises:
- Embodiments of the present invention are capable of fabricating and providing a high performance mesa based active region based PIN diode suitable for use in forming a solid state plasma antenna using an in situ doping process.
- FIG. 7 is a schematic diagram of a method for fabricating a PIN diode based on a mesa active region in another reconfigurable loop antenna according to an embodiment of the present invention.
- a PIN diode based on a mesa active region having a solid plasma region length of 100 ⁇ m is prepared as an example for detailed description. The specific steps are as follows:
- the crystal orientation of the SOI substrate 101 is (100).
- the doping type of the SOI substrate 101 is p-type
- the doping concentration is 10 14 cm -3
- the thickness of the top Si is, for example, 20 ⁇ m.
- a silicon nitride layer 201 is deposited on the SOI substrate 101 by a chemical vapor deposition (CVD) method.
- a mesa active area pattern is formed on the silicon nitride layer by a photolithography process, and the protective layer is etched at a specified position of the active area pattern by a dry etching process.
- the top layer of silicon forms a mesa active region 301. See Figure 7c-2 for a top view.
- FIG. 7d-1 the sidewalls of the active area of the mesa are oxidized to form an oxide layer 401 on the sidewalls of the active area of the mesa, and FIG. 7d-2 is a top view;
- the sidewall oxidation layer of the active area of the mesa is etched by a wet etching process to complete the planarization of the sidewalls of the active area of the mesa.
- a wet etching process for the top view, please refer to 7e-2.
- a layer of silicon dioxide 601 is deposited on the substrate by a CVD method.
- P regions are formed using a photolithography process on the SiO 2 pattern layer, using a wet etch process to remove the SiO 2 pattern layer P region.
- the method may be: using a method of in-situ doping, depositing p-type silicon on the P-region pattern on the surface of the SOI substrate to form a P region 801, and controlling the doping of the P region by controlling the gas flow rate. Miscellaneous concentration.
- the surface of the P region may be planarized by a dry etching process, and then the SiO 2 layer on the surface of the substrate may be removed by a wet etching process.
- the silicon oxide layer 1001 may be deposited on the surface of the substrate by a CVD method.
- N region is formed using a photolithography process on the SiO 2 pattern layer; using a wet etching process to remove the SiO 2 layer N region.
- an n-type silicon is formed on the N-region pattern on the surface of the SOI substrate by an in-situ doping method to form an N region 1201, and the doping concentration of the N region is controlled by controlling the gas flow rate.
- the surface of the N region is planarized by a dry etching process, and the SiO 2 layer on the surface of the substrate is removed by a wet etching process.
- the metal layer 1401 can be sputtered in the trench by CVD.
- a silicon oxide (SiO 2 ) layer 1501 may be deposited on the surface by a CVD method to a thickness of 500 nm.
- the surface silicon dioxide and silicon nitride (SiN) layer can be removed by CMP to make the surface flat.
- Annealing at 950-1150 ° C for 0.5 to 2 minutes activates ion-implanted impurities and promotes impurities in the active region.
- the lead holes 1701 are photolithographically formed on the silicon dioxide (SiO 2 ) layer.
- a metal may be sputtered on the surface of the substrate, alloyed to form a metal silicide, and the metal on the surface is etched away; and then metal 1801 is sputtered on the surface of the substrate to lithographically lead.
- a passivation layer 1901 can be formed by depositing silicon nitride (SiN) to photolithographically PAD.
- SiN silicon nitride
- a PIN diode is finally formed as a material for preparing a solid plasma antenna.
- FIG. 8 is a schematic structural diagram of a device for a PIN diode based on a mesa active region in another reconfigurable loop antenna according to an embodiment of the present invention.
- the PIN diode was fabricated by the above-described preparation method as shown in Fig. 2. Specifically, the PIN diode is formed on the SOI substrate 301, and the P region 303, the N region 304 of the PIN diode, and the I region laterally located between the P region 303 and the N region 304 are both located on the SOI substrate. Inside the top silicon 302.
- the embodiment of the invention can avoid the adverse effects caused by ion implantation and the like by using in-situ doping, and can control the doping concentration of the material by controlling the gas flow rate, and is more favorable for obtaining a steep doping interface, thereby obtaining better.
- the PIN diode plasma reconfigurable antenna may be an array of SOI-based PIN diodes arranged in an array, and selectively connected by a PIN diode in an external control array to form a dynamic solid-state plasma stripe and have an antenna function.
- the antenna has a transmitting and receiving function for a specific electromagnetic wave, and the antenna can change the shape and distribution of the solid plasma strip by selective conduction of the PIN diode in the array, thereby realizing antenna reconstruction, and is important in defense communication and radar technology. Application prospects.
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Abstract
Description
Claims (10)
- 一种可重构环形天线中基于台状有源区PIN二极管串的制备方法,其特征在于,所述PIN二极管用于制作可重构环形天线,所述环形天线包括:半导体基片;介质板;第一PIN二极管环、第二PIN二极管环、第一直流偏置线及第二直流偏置线,均设置于所述半导体基片上;耦合式馈源,设置于所述介质板上。所述制备方法包括步骤:(a)选取SOI衬底;(b)刻蚀SOI衬底形成台状有源区;(c)对所述台状有源区四周利用原位掺杂工艺分别淀积P型Si材料和N型Si材料形成P区和N区;(d)利用CVD工艺,在所述台状有源区四周淀积所述多晶Si材料;(e)利用CVD工艺,在整个衬底表面淀积第四保护层;(f)利用退火工艺激活所述P区和所述N区中的杂质;(g)在所述多晶Si材料表面制作引线并光刻PAD以形成所述PIN二极管串。
- 如权利要求1所述的制备方法,其特征在于,步骤(b)包括:(b1)利用CVD工艺,在所述SOI衬底表面形成第一保护层;(b2)采用第一掩膜版,利用光刻工艺在所述第一保护层上形成有源区图形;(b3)利用干法刻蚀工艺,对所述有源区图形的指定位置四周刻蚀所述第一保护层及所述SOI衬底的顶层Si层从而形成有所述台状有源区。
- 如权利要求1所述的制备方法,其特征在于,步骤(b)之后,还包括:(x1)利用氧化工艺,对所述台状有源区的侧壁进行氧化以在所述台状有源区侧壁形成氧化层;(x2)利用湿法刻蚀工艺刻蚀所述氧化层以完成对所述台状有源区侧壁的平整化处理。
- 如权利要求1所述的制备方法,其特征在于,步骤(c)包括:(c1)在整个衬底表面淀积第二保护层;(c2)采用第二掩膜板,利用光刻工艺在所述第二保护层表面形成P区图形;(c3)利用湿法刻蚀工艺去除P区图形上的所述第二保护层;(c4)利用原位掺杂工艺,在所述台状有源区侧壁淀积P型Si材料形成所述P区;(c5)在整个衬底表面淀积第三保护层;(c6)采用第三掩膜板,利用光刻工艺在所述第三保护层表面形成N区图形;(c7)利用湿法刻蚀工艺去除N区图形上的所述第三保护层;(c8)利用原位掺杂工艺,在所述台状有源区侧壁淀积N型Si材料形成所述N区。
- 如权利要求4所述的制备方法,其特征在于,步骤(c4)包括:(c41)利用原位掺杂工艺,在所述台状有源区侧壁淀积P型Si材料;(c42)采用第四掩膜版,利用干法刻蚀工艺刻蚀所述P型Si材料以在所述台状有源区的侧壁形成所述P区;(c43)利用选择性刻蚀工艺去除整个衬底表面的所述第二保护层。
- 如权利要求4所述的制备方法,其特征在于,步骤(c8)包括:(c81)利用原位掺杂工艺,在所述台状有源区侧壁淀积N型Si材料;(c82)采用第五掩膜版,利用干法刻蚀工艺刻蚀所述N型Si材料以在所述台状有源区的另一侧壁形成所述N区;(c83)利用选择性刻蚀工艺去除整个衬底表面的所述第三保护层。
- 如权利要求1所述的制备方法,其特征在于,步骤(g)包括:(g1)采用第六掩膜版,利用光刻工艺在所述第四保护层表面形成引线孔图形;(g2)利用各向异性刻蚀工艺刻蚀所述第四保护层漏出部分所述多晶Si材料以形成所述引线孔;(g3)对所述引线孔溅射金属材料以形成金属硅化物;(g4)钝化处理并光刻PAD,最终互连以形成所述PIN二极管串。
- 如权利要求1所述的制备方法,其特征在于,所述第一等离子PIN二极管环包括第一等离子PIN二极管串,所述第二等离子PIN二极管环包括第二等离子PIN二极管串,且所述第一等离子PIN二极管环及所述第二等离子PIN二极管环的周长等于其所要接收信号的电磁波波长。
- 如权利要求1所述的制备方法,其特征在于,在所述第一等离子PIN二极管串及所述第二等离子PIN二极管串两端设置有第一直流偏置线及第二直流偏置线,所述第一直流偏置线及所述第二直流偏置线采用重掺杂多晶硅制作在所述半导体基片上。
- 根据权利要求1所述的环形天线,其特征在于,所述耦合式馈源制作在所述介质板上且其上表面为金属微带贴片,下表面为金属接地板,所述金属微带贴片包括主枝节、第一分枝节及第二分枝节。
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JP2019534816A JP2020503683A (ja) | 2016-12-20 | 2017-12-09 | リファクタリングが可能な環状アンテナの台状アクティブリージョンによるpinダイオード組の製造方法 |
US15/854,054 US10665689B2 (en) | 2016-12-20 | 2017-12-26 | Preparation method for platform-shaped active region based P-I-N diode string in reconfigurable loop antenna |
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CN201611184336.3A CN107068560B (zh) | 2016-12-20 | 2016-12-20 | 可重构环形天线中基于台状有源区pin二极管串的制备方法 |
CN201611184336.3 | 2016-12-20 |
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US20010049180A1 (en) * | 2000-03-20 | 2001-12-06 | Taylor Gordon C. | Surface pin device |
US20050218397A1 (en) * | 2004-04-06 | 2005-10-06 | Availableip.Com | NANO-electronics for programmable array IC |
CN102956993A (zh) * | 2012-11-14 | 2013-03-06 | 华南理工大学 | 基于s-pin二极管的方向图可重构圆盘型微带天线 |
CN103682610A (zh) * | 2013-12-06 | 2014-03-26 | 中国科学院深圳先进技术研究院 | 可重构天线及其系统 |
CN107068560A (zh) * | 2016-12-20 | 2017-08-18 | 西安科锐盛创新科技有限公司 | 可重构环形天线中基于台状有源区pin二极管串的制备方法 |
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US20010049180A1 (en) * | 2000-03-20 | 2001-12-06 | Taylor Gordon C. | Surface pin device |
US20050218397A1 (en) * | 2004-04-06 | 2005-10-06 | Availableip.Com | NANO-electronics for programmable array IC |
CN102956993A (zh) * | 2012-11-14 | 2013-03-06 | 华南理工大学 | 基于s-pin二极管的方向图可重构圆盘型微带天线 |
CN103682610A (zh) * | 2013-12-06 | 2014-03-26 | 中国科学院深圳先进技术研究院 | 可重构天线及其系统 |
CN107068560A (zh) * | 2016-12-20 | 2017-08-18 | 西安科锐盛创新科技有限公司 | 可重构环形天线中基于台状有源区pin二极管串的制备方法 |
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