WO2017107307A1 - 一种具有圆形晶片结构的石英晶体谐振器及其制作方法 - Google Patents
一种具有圆形晶片结构的石英晶体谐振器及其制作方法 Download PDFInfo
- Publication number
- WO2017107307A1 WO2017107307A1 PCT/CN2016/074957 CN2016074957W WO2017107307A1 WO 2017107307 A1 WO2017107307 A1 WO 2017107307A1 CN 2016074957 W CN2016074957 W CN 2016074957W WO 2017107307 A1 WO2017107307 A1 WO 2017107307A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal layer
- package
- quartz
- electrode region
- circular
- Prior art date
Links
- 239000010453 quartz Substances 0.000 title claims abstract description 137
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 239000013078 crystal Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 86
- 239000010410 layer Substances 0.000 claims description 82
- 239000000758 substrate Substances 0.000 claims description 42
- 230000001681 protective effect Effects 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004806 packaging method and process Methods 0.000 abstract 3
- 235000012431 wafers Nutrition 0.000 description 63
- 238000013461 design Methods 0.000 description 11
- 238000005530 etching Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000001312 dry etching Methods 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 5
- 238000001039 wet etching Methods 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010329 laser etching Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
- H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
Definitions
- the present invention relates to the field of quartz crystal resonator technology, and more particularly to a quartz crystal resonator having a circular wafer structure and a method of fabricating the same.
- a quartz crystal resonator is generally composed of a piezoelectric quartz wafer and a package casing, and the package casing material is ceramic, glass, or the like.
- the electrodes on the upper and lower sides of the piezoelectric quartz wafer are vapor-deposited, and the electrodes are connected to the pedestal pins in the package by sealing the leads of the package.
- the AC voltage can be connected to the upper and lower electrodes of the quartz wafer through the pins, causing the quartz wafer to have an inverse piezoelectric effect, thereby generating oscillation.
- Quartz crystal resonators are widely used in electronic industries such as mobile electronic devices, mobile phones, and mobile communication devices due to their accuracy and stability.
- Quartz crystal resonator package structure has two kinds of in-line type and plane mount.
- in-line type With the rapid development of mobile communication electronics, the demand for miniaturization of devices is getting higher and higher, and the miniaturization of quartz crystal resonators is also imperative.
- the in-line type is gradually replaced by a flat mount type in recent years due to its large size.
- Planar Mounted Quartz Crystal Resonators Due to specifications and process limitations, only rectangular quartz wafers are currently available. In the face of the need for miniaturization of resonators, rectangular quartz wafers face many challenges in the design and manufacture of packages. First, the smaller the volume of a rectangular quartz wafer, the more difficult the design, the longer the design cycle, and the more difficult it is to meet the design tolerances of existing processes.
- the traditional cutting, etching and other processes are also difficult to process ultra-small quartz wafers, which cannot meet the needs of miniaturized resonators.
- the quartz wafer is fixed in the pedestal by means of dispensing, and the dispensing method limits the size of the quartz wafer. If the quartz wafer is too small, the size of the dispensing is constant, and the performance of the quartz crystal resonator is It has a huge impact.
- the miniaturization of the quartz crystal resonator has improved the manufacturing difficulty of the conventional package casing, and the conventional packaging process has become more and more difficult to meet the demand for miniaturization.
- the object of the present invention is to overcome the shortcomings of the prior art, and to provide a circular wafer which can be used for low-cost mass production of miniaturized resonators, can enhance the central energy trapping effect of quartz wafers, and greatly improve product consistency. Structured quartz crystal resonator and its fabrication method.
- a quartz crystal resonator having a circular wafer structure, which comprises a quartz wafer, a package cover and a package base;
- the quartz wafer includes a circular member, a connection And a protective frame, the circular member is disposed in the protective frame through the connecting portion, and the shape of the connecting portion is a rectangular or trapezoidal shape, and the upper and lower surfaces of the circular member are plated with electrodes to form an electrode region, preferably The electrode area is circular in shape;
- the metal layer A is disposed on the connecting portion and the protection frame, and the positioning hole is further disposed on the protection frame, the metal layer B is disposed in the positioning hole, and the bottom surface of the package base is provided with a pin and an electrode
- the region is electrically connected to the lead through the metal layer A and the metal layer B.
- the package cover, the quartz wafer and the package base are sequentially packaged from top to bottom to form a cavity structure for the circular member to oscillate freely.
- the quartz wafer material is a quartz crystal
- the package cover and the package base material are quartz crystal, glass, ceramic, and the like.
- the resulting piezoelectric quartz crystal resonator has a length of 0.8 to 3.2 mm and a width of 0.6 to 2.5 mm.
- the protection frame has a rectangular shape and functions as a support and a package connection; the circular member is located at a center of the protection frame, and the circular member is connected to a frame of the protection frame through the connection portion, The circular member can freely vibrate within the packaged cavity, and when the protective frame is subjected to external force, the force is not transmitted to the circular member, thereby well protecting the circular member. Further, the circular member is connected to any short frame of the protective frame through the connecting portion. The area material between the circular member and the protective frame is removed by chemical etching or physical cutting of the quartz substrate, and the shapes of the circular member, the connecting portion and the protective frame are integrally formed by removing the material.
- the protection frame has a rectangular shape, and the positioning holes are disposed at four corners of the rectangle.
- the outer frame of the package cover is provided with a package groove A for preventing leakage of the package liquid
- the outer frame of the package base is provided with a package groove B for preventing leakage of the package liquid.
- the electrode region includes an upper electrode region and a lower electrode region, and the upper electrode region and the lower electrode region are respectively disposed on the upper surface and the lower surface of the circular member
- the metal layer A includes an upper surface metal layer and a lower portion.
- the surface metal layer, the upper surface metal layer and the lower surface metal layer are respectively disposed on the upper surface and the lower surface of the connecting portion and the protective frame, the upper electrode region is electrically connected to the upper surface metal layer, and the lower electrode region is electrically connected to the lower surface metal layer.
- the upper surface metal layer and the lower surface metal layer are respectively connected to the metal layer B in different positioning holes, and the metal layer B is also connected to different pins.
- the surface of the circular member is provided with a boss, and the boss is disposed on one side or both sides of the circular member; when a surface of the circular member is provided with a boss, the electrode region They are respectively disposed on the surface of the boss and the other surface of the circular member; when both surfaces of the circular member are provided with the bosses, the electrode regions are disposed on the surface of the boss.
- the boss structure can effectively reduce the parasitic vibration generated by the edge and enhance the trapping effect at the center of the quartz wafer.
- a method for fabricating a quartz crystal resonator having a circular wafer structure comprising the steps of: [0013] Sl, using a quartz substrate as a substrate, preparing a boss, a circular member, and positioning on a quartz substrate a hole, and an electrode region and a metal layer A are prepared, and the electrode region is connected to the metal layer A; the boss and the circular member can be wet etched, dry etched, laser etched, physically blasted, etc.
- step S1 includes the following sub-steps:
- the outer frame of the package cover is provided with a package groove A
- the outer frame of the package base is provided with a package groove B
- the package cover, the quartz wafer and the package base are stacked.
- step S3 the detailed process of the step S3 is: performing vapor deposition of the conductive metal layer B on the side surface of the positioning hole on the packaged quartz substrate, so that the upper surface metal layer and the lower surface metal layer are respectively positioned differently
- the metal layers B in the holes are connected and the metal layer B is in electrical communication with the pins on the package substrate.
- the present invention has the following advantages:
- the present invention uses a circular quartz wafer for miniaturized patch-type quartz crystal resonators, and creatively improves the overall structure of a conventional patch-type quartz crystal resonator; Moreover, the packaged wafer is not easy to be fixed, and the invention adopts a novel process for processing the wafer, the process is simple, and the wafer is directly connected with the protection frame, and the package is simple.
- the invention can be used for mass production of miniaturized quartz crystal resonators, reducing the production cost, greatly improving the manufacturing efficiency of the resonator, and improving the consistency and overall quality of the same resonator.
- FIG. 1 is a schematic structural view of an unpackaged composite crucible according to an embodiment of the present invention
- FIG. 2 is a schematic structural view of a package cover according to an embodiment of the present invention.
- FIG. 3 is a schematic structural view of a quartz wafer according to an embodiment of the present invention.
- FIG. 4 is a plan view of a quartz wafer in accordance with an embodiment of the present invention.
- FIG. 5 is a schematic structural view of a package base according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram showing a main cross-sectional structure of a package assembly according to an embodiment of the present invention.
- FIG. 7 is a schematic structural view of a quartz substrate according to an embodiment of the present invention.
- a quartz crystal resonator having a circular wafer structure includes a quartz wafer 10, a package cover 20, and a package base 30.
- the quartz wafer 10 includes a circular member 11, a connecting portion 12, and a protective frame 13, and the protective frame 13 has a rectangular shape to serve as a support and package connection.
- the circular member 11 is disposed at the center of the protective frame 13 and is free to vibrate.
- the circular member 11 is connected to a short frame of the protective frame 13 through the connecting portion 12, and when the protective frame 13 is subjected to external force, the force is not It is transmitted to the circular member 11, so that the circular member 11 is well protected.
- the package cover 20, the quartz wafer 10 and the package base 30 are sequentially packaged and pressed from top to bottom, and the package cover 20, the quartz wafer 10 and the package base 30 are packaged and pressed to form a circular member 11 Freely oscillating cavity structure.
- a package trench A21 is disposed on the outer frame of the package cover 20, and a package trench B32 is disposed on the outer frame of the package base 30.
- the package trench is used to prevent leakage of the package liquid and form a vacuum inside the resonator. Cavity.
- the package structure is simple and easy to process, and the thickness of the quartz crystal resonator is reduced.
- the working principle of the quartz crystal resonator is based on the piezoelectric effect, and the electrical connection relationship in this embodiment is as follows:
- the upper surface of the circular member 11 is provided with a boss 18 on which the electrode is plated on the upper surface of the boss 18 Forming the upper electrode region 141, plating the electrodes on the lower surface of the circular member 11 to form the lower electrode region 142, the rational arrangement of the upper electrode region 141 and the lower electrode region 142, and the design of the boss 18 can effectively reduce the spurious vibration generated by the edge And capable of enhancing the energy trapping effect of the center of the quartz wafer and reducing the coupling;
- the upper surface and the lower surface of the connecting portion 12 and the protective frame 13 are respectively provided with an upper surface metal layer 151 and a lower surface metal layer 152, at the four corners of the protective frame 13
- a positioning hole 16 is disposed, and a metal layer B17 is disposed in the positioning hole 16;
- a lead 31 is disposed on the bottom surface of the package base 30.
- the upper electrode region 141 is electrically connected to the upper surface metal layer 151
- the lower electrode region 142 is electrically connected to the lower surface metal layer 152
- the upper surface metal layer 151 and the lower surface metal layer 152 are respectively different from the positioning holes 16
- the inner metal layer B17 is connected, and the metal layer B17 is connected to different pins 31.
- the electrode region 141 and the lower electrode region 142 are all circular in shape, and the connecting portion 12 has a rectangular shape.
- the boss 18 is designed to reduce the parasitic vibration generated by the edge, and enhance the energy trapping effect at the center of the quartz wafer, thereby reducing the coupling; the actual production crucible can be disposed on either side of the upper surface and the lower surface of the circular member 11, It is also possible to provide the boss 18 on both surfaces, or the boss 18 may not be provided according to the actual application.
- the quartz wafer 10 is of an AT cut type, and this cut type is generally applied to a quartz crystal resonator.
- the long side of the quartz wafer 10 is parallel to the X axis, the X axis is the electric axis of the quartz crystal, the short side is parallel to the Z' axis, and the thickness direction is parallel to the Y' axis. It is also possible to have the long side of the quartz wafer parallel to the Z' axis, the width parallel to the X axis, and the thickness direction parallel to the Y' axis.
- the main vibration mode of the AT-cut quartz wafer is the thickness trimming mode.
- the generated parasitic vibrations such as bending vibration and surface shear vibration increase, and coupling is easy, for the quartz crystal resonator.
- Performance has a huge impact.
- the probability of spurious vibration at the edge of the wafer is reduced, the coupling is less likely to occur, the design tolerance is larger, the process requirements are lowered, and the design cost is lowered.
- the materials of the quartz wafer 10, the package cover 20, and the package base 30 are all quartz crystals. According to actual needs, a piezoelectric quartz crystal oscillator having a length of 0.8 to 3.2 mm and a width of 0.6 to 2.5 mm can be produced. In this embodiment, the piezoelectric quartz crystal oscillator has a length of 1.6 mm and a width of 1.2 mm.
- the resonant frequency of the quartz crystal oscillator in this example is between 8MHz and 70 ⁇ .
- a method for fabricating a quartz crystal resonator having a circular wafer structure comprising the steps of: [0043] Sl, using a quartz substrate 40 as a substrate, preparing a boss 18, a circular shape on the quartz substrate 40 The member 11 and the positioning hole 16 are formed, and the electrode region 14 and the metal layer A15 are prepared.
- the electrode region 14 is connected to the metal layer A15, and specifically includes the following sub-steps:
- the boss 18 can be obtained by wet etching or dry etching, and the specific preparation process is as follows: First, take out one The quartz substrate 40 of a predetermined size is subjected to grinding and polishing treatment on the upper and lower surfaces of the quartz substrate 40. Secondly, a lithographic anti-etching protective layer ER having a uniform thickness is formed on the surface of the quartz substrate 40 by spin coating or spraying. And forming a pattern to be etched on the surface of the lithographic anti-etching protective layer ER by using photolithography; finally, etching the surface of the quartz substrate 40 by wet etching or dry etching to form a surface of the quartz substrate 40 Boss 18. The etching depth of the land 18 is determined by controlling the reaction between wet etching or dry etching.
- the circular member 11 can be obtained by wet etching, dry etching, laser etching, physical blasting, etc., and the specific preparation process is as follows: First, the lithography resistance formed during the process of fabricating the bump 18 is removed.
- the package cover 20, the quartz wafer 10 and the package base 30 are sequentially stacked and packaged and soldered; to prevent leakage of the package liquid, the outer frame of the package cover 20 is provided with a package trench A21, and the package base 30 is provided.
- a package trench B32 is disposed on the outer frame, and during the process of soldering the package cover 20, the quartz wafer 10 and the package base 30, glass solder or resin solder is added to the package trench A21 and the package trench B32, and the whole Package soldering in a vacuum environment.
- the quartz wafer 10 is cut off from the quartz substrate 40, thereby preparing a quartz crystal resonator having a circular wafer structure.
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016570254A JP2018504793A (ja) | 2015-12-22 | 2016-02-29 | 円形のウェハ構造を有する水晶共振器及びその製造方法 |
KR1020167032159A KR20170136967A (ko) | 2015-12-22 | 2016-02-29 | 원형 웨이퍼 구조를 갖는 석영크리스탈 공진기 및 그 제작방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510966616.9A CN105634436A (zh) | 2015-12-22 | 2015-12-22 | 一种具有圆形晶片结构的石英晶体谐振器及其制作方法 |
CN201510966616.9 | 2015-12-22 |
Publications (1)
Publication Number | Publication Date |
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WO2017107307A1 true WO2017107307A1 (zh) | 2017-06-29 |
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ID=56049057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2016/074957 WO2017107307A1 (zh) | 2015-12-22 | 2016-02-29 | 一种具有圆形晶片结构的石英晶体谐振器及其制作方法 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2018504793A (zh) |
KR (1) | KR20170136967A (zh) |
CN (1) | CN105634436A (zh) |
TW (1) | TWI602327B (zh) |
WO (1) | WO2017107307A1 (zh) |
Cited By (7)
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CN110224683A (zh) * | 2019-07-09 | 2019-09-10 | 成都泰美克晶体技术有限公司 | 一种长h型结构的高频抛光石英晶片 |
CN110224681A (zh) * | 2019-07-09 | 2019-09-10 | 成都泰美克晶体技术有限公司 | 一种短h型结构的高频抛光石英晶片 |
CN111313855A (zh) * | 2020-03-16 | 2020-06-19 | 研创科技(惠州)有限公司 | 一种新型谐振器组装方法 |
CN114351094A (zh) * | 2021-12-20 | 2022-04-15 | 唐山万士和电子有限公司 | 一种增镀石墨层微天平石英晶片的生产方法 |
CN116455343A (zh) * | 2023-05-15 | 2023-07-18 | 烟台明德亨电子科技有限公司 | 一种晶振用陶瓷基座的加工方法 |
CN117411457A (zh) * | 2023-12-14 | 2024-01-16 | 西安电子科技大学 | 一种环形类拱形石英谐振器 |
CN117674764A (zh) * | 2023-12-04 | 2024-03-08 | 泰晶科技股份有限公司 | 晶圆级封装谐振器及其制备方法、电子设备 |
Families Citing this family (4)
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CN107769750A (zh) * | 2017-11-13 | 2018-03-06 | 成都泰美克晶体技术有限公司 | 一种改进电极连接结构的全石英晶体谐振器及其制备方法 |
CN111256673B (zh) * | 2020-01-19 | 2021-09-10 | 北京晨晶电子有限公司 | 一种石英音叉和基座的连接结构、连接方法及其应用 |
CN113300689B (zh) * | 2021-03-29 | 2023-01-31 | 天津大学 | 具有加固结构的石英谐振器及其形成方法、电子设备 |
CN113271082A (zh) * | 2021-06-22 | 2021-08-17 | 泰晶科技股份有限公司 | 一种具有高斯型电极结构的压电石英晶片及其制造工艺 |
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2015
- 2015-12-22 CN CN201510966616.9A patent/CN105634436A/zh active Pending
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2016
- 2016-02-29 KR KR1020167032159A patent/KR20170136967A/ko not_active Application Discontinuation
- 2016-02-29 WO PCT/CN2016/074957 patent/WO2017107307A1/zh active Application Filing
- 2016-02-29 JP JP2016570254A patent/JP2018504793A/ja active Pending
- 2016-10-26 TW TW105134521A patent/TWI602327B/zh active
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JP2018504793A (ja) | 2018-02-15 |
CN105634436A (zh) | 2016-06-01 |
TW201724587A (zh) | 2017-07-01 |
TWI602327B (zh) | 2017-10-11 |
KR20170136967A (ko) | 2017-12-12 |
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