WO2021056802A1 - 5g天线pcb幅度一致性的控制方法 - Google Patents

5g天线pcb幅度一致性的控制方法 Download PDF

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Publication number
WO2021056802A1
WO2021056802A1 PCT/CN2019/121158 CN2019121158W WO2021056802A1 WO 2021056802 A1 WO2021056802 A1 WO 2021056802A1 CN 2019121158 W CN2019121158 W CN 2019121158W WO 2021056802 A1 WO2021056802 A1 WO 2021056802A1
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WIPO (PCT)
Prior art keywords
consistency
control
impedance
antenna pcb
amplitude
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PCT/CN2019/121158
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English (en)
French (fr)
Inventor
吴伟峰
刘亚江
武守坤
乔元
李波
Original Assignee
惠州市金百泽电路科技有限公司
深圳市金百泽电子科技股份有限公司
西安金百泽电路科技有限公司
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Publication of WO2021056802A1 publication Critical patent/WO2021056802A1/zh

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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0213Electrical arrangements not otherwise provided for
    • H05K1/0237High frequency adaptations
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0213Electrical arrangements not otherwise provided for
    • H05K1/0237High frequency adaptations
    • H05K1/025Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/0005Apparatus or processes for manufacturing printed circuits for designing circuits by computer
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/02Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
    • H05K3/06Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process

Definitions

  • the invention belongs to the technical field of 5G communication-printed circuit board manufacturing, and specifically relates to a method for controlling the consistency of the 5G antenna PCB amplitude.
  • the 5G network is the fifth-generation mobile communication technology; with the birth of 5G technology, many countries and regions are currently attaching great importance to the commercial use of 5G and are already racing to develop 5G network technology.
  • the priority layout is the 5G base station
  • the core product related to the PCB is the 5G antenna PCB
  • the MIMO antenna is the key technology for product processing.
  • MIMO antennas differ in form from the design of array antennas. The number is very large, and the units have independent transceiver capabilities, which is equivalent to multi-antenna units simultaneously sending and receiving data. This puts higher requirements on product consistency.
  • Its core The index is range range ⁇ 1.0db. To achieve this index requirement, the coupling range of the 5G antenna A/B board needs to be controlled within 0.015mm, which is currently difficult to achieve by conventional methods.
  • the current amplitude index is mainly tested by the end customer, which can only be carried out after the components are patched. This is a post-test. Once the amplitude is out of tolerance, it needs to be paired or debugged again, which is time-consuming and laborious, and severe deviations need to be scrapped. The cost is high, so it is necessary to develop a PCB pre-detection method to accurately reflect the consistency of PCB products and reduce the cost of terminal debugging.
  • the dielectric thickness and dielectric constant are mainly determined by the performance of the plate, while the copper thickness and line width accuracy are related to the PCB Processing is directly related.
  • the coupling range of the 5G antenna A/B board needs to be controlled within 0.015mm.
  • the current conventional process is difficult to meet, especially the mass production quality is difficult to guarantee. Therefore, how to ensure the consistency of mass production stably and efficiently has become a problem to be solved in the PCB industry.
  • the present invention provides a control method for 5G antenna PCB amplitude consistency.
  • the present invention can stably and efficiently ensure the consistency of 5G antenna mass production, and can accurately detect at the PCB stage, thereby reducing the debugging cost of end customers.
  • a method for controlling the consistency of the 5G antenna PCB amplitude which is characterized in that it includes a consistency processing method of the 5G antenna PCB and a 5G antenna PCB consistency detection method;
  • the consistent processing method of the 5G antenna PCB includes the following:
  • the method for controlling copper thickness and electroplating uniformity includes:
  • Pre-cut copper for blind hole plate 1OZ thinning to 0.33 OZ, control the copper thickness tolerance within ⁇ 2.0um;
  • VCP plating control copper thickness and uniformity ⁇ 5um
  • the method of line width accuracy control includes:
  • the method for controlling the coupling distance range includes:
  • Etching consistency control line synchronous etching
  • the method for controlling the consistency of the product impedance is: the impedance tolerance of the surrounding impedance bars is controlled by ⁇ 2%, and the maximum range of the batch is less than or equal to 2 ohms.
  • the project detects the coupling line distance and line width of all the array antennas, and controls the deviation ⁇ 0.01mil; at the same time, referring to the coupling line, an impedance bar is added around the process side, Provide measurement basis for consistency control; through the control of copper thickness, pattern transfer accuracy, line width etching accuracy and consistency, the processing requirements of coupling line pitch etching range ⁇ 0.015mm are achieved, and the high accuracy of impedance tolerance ⁇ 2% is achieved Processing to ensure the consistency of product processing. ...
  • the method for detecting the consistency of the 5G antenna PCB includes the following:
  • the special engineering design includes, referring to the coupled line, impedance bars are designed around the process side.
  • the method for matching the serial number is: fully measuring the impedance after the ET test, and matching the serial number according to the impedance range, so as to ensure the consistency of the amplitude of the 5G antenna A/B board.
  • the amplitude and consistency usually require the end customer to test after the components are mounted, which is a post-test. Once the amplitude is out of range, it needs to be re-paired or debugged, which is time-consuming and labor-intensive, and serious deviations. It needs to be scrapped, and the cost is high.
  • pre-detection can be carried out in the PCB stage, and then the serial number is matched, thereby reducing the cost of terminal debugging.
  • Fig. 1 is a process flow diagram of an embodiment of the present invention.
  • a method for controlling the consistency of the 5G antenna PCB amplitude which is characterized in that it includes a consistency processing method of the 5G antenna PCB and a 5G antenna PCB consistency detection method;
  • the consistent processing method of the 5G antenna PCB includes the following:
  • the method for controlling copper thickness and electroplating uniformity includes:
  • Pre-cut copper for blind hole plate 1OZ thinning to 0.33 OZ, control the copper thickness tolerance within ⁇ 2.0um;
  • VCP plating control copper thickness and uniformity ⁇ 5um
  • the method of line width accuracy control includes:
  • the method for controlling the coupling distance range includes:
  • Etching consistency control line synchronous etching
  • the method for controlling the consistency of the product impedance is: the impedance tolerance of the surrounding impedance bars is controlled by ⁇ 2%, and the maximum range of the batch is less than or equal to 2 ohms.
  • the project detects the coupling line distance and line width of all the array antennas, and controls the deviation ⁇ 0.01mil; at the same time, referring to the coupling line, an impedance bar is added around the process side, Provide measurement basis for consistency control; through the control of copper thickness, pattern transfer accuracy, line width etching accuracy and consistency, the processing requirements of coupling line pitch etching range ⁇ 0.015mm are achieved, and the high accuracy of impedance tolerance ⁇ 2% is achieved Processing to ensure the consistency of product processing. ...
  • the method for detecting the consistency of the 5G antenna PCB includes the following:
  • the special engineering design includes, referring to the coupled line, impedance bars are designed around the process side.
  • the method for matching the serial number is: fully measuring the impedance after the ET test, and matching the serial number according to the impedance range, so as to ensure the consistency of the amplitude of the 5G antenna A/B board.
  • a method for controlling the consistency of the 5G antenna PCB amplitude which is characterized in that it includes a consistency processing method of the 5G antenna PCB and a 5G antenna PCB consistency detection method;
  • the consistent processing method of the 5G antenna PCB includes the following:
  • the method for controlling copper thickness and electroplating uniformity includes:
  • Pre-cut copper for blind hole plate 1OZ thinning to 0.33 OZ, control the copper thickness tolerance within ⁇ 2.0um;
  • VCP plating control copper thickness and uniformity ⁇ 5um
  • the method of line width accuracy control includes:
  • the method for controlling the coupling distance range includes:
  • Etching consistency control line synchronous etching
  • the method for controlling the consistency of the product impedance is: the impedance tolerance of the surrounding impedance bars is controlled by ⁇ 2%, and the maximum range of the batch is less than or equal to 2 ohms.
  • the project detects the coupling line distance and line width of all the array antennas, and controls the deviation ⁇ 0.01mil; at the same time, referring to the coupling line, an impedance bar is added around the process side, Provide measurement basis for consistency control; through the control of copper thickness, pattern transfer accuracy, line width etching accuracy and consistency, the processing requirements of coupling line pitch etching range ⁇ 0.015mm are achieved, and the high accuracy of impedance tolerance ⁇ 2% is achieved Processing to ensure the consistency of product processing. ...
  • the method for detecting the consistency of the 5G antenna PCB includes the following:
  • the special engineering design includes, referring to the coupled line, impedance bars are designed around the process side.
  • the method for matching the serial number is: fully measuring the impedance after the ET test, and matching the serial number according to the impedance range, so as to ensure the consistency of the amplitude of the 5G antenna A/B board.
  • the amplitude and consistency usually require the end customer to test after the components are mounted, which is a post-test. Once the amplitude is out of range, it needs to be re-paired or debugged, which is time-consuming and labor-intensive, and serious deviations. It needs to be scrapped, and the cost is high.
  • pre-detection can be carried out in the PCB stage, and then the serial number is matched, thereby reducing the cost of terminal debugging.
  • This embodiment provides a method for controlling the amplitude consistency of a 5G antenna PCB.
  • this embodiment is suitable for controlling the amplitude consistency of a 3-layer 5G antenna PCB; specifically including the following:
  • the full-measured copper surface shall be strictly controlled at 40 ⁇ 3um.
  • the A/B board is arranged for simultaneous etching
  • the amplitude value test is carried out according to the impedance range gradient
  • the impedance range is controlled within 1.5 ohms, and the consistency requirement of amplitude ⁇ 1.0db can be achieved.
  • pre-detection can be performed at the PCB stage, and then the serial number is paired, thereby reducing the cost of terminal debugging.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Details Of Aerials (AREA)

Abstract

本发明提供一种5G天线PCB幅度一致性的控制方法,包括5G天线PCB的一致性加工方法和5G天线PCB一致性检测方法;所述5G天线PCB的一致性加工方法包括以下:A、铜厚及电镀均匀性控制;B、线宽精度控制;C、耦合线距极差控制;D、产品阻抗一致性控制;所述5G天线PCB一致性检测方法包括以下:E、工程特殊设计;F、找出阻抗偏差与幅度一致性的相互关系,确定最大极差控制范围;G、序列号匹配。本发明可以稳定高效地保证5G天线量产的一致性,且在PCB阶段可以准确检测,从而降低终端客户调试成本。

Description

5G天线PCB幅度一致性的控制方法 技术领域
本发明属于5G通讯-印制电路板的制作技术领域,具体涉及到的是一种5G天线PCB幅度一致性的控制方法。
背景技术
5G网络即第五代移动通信技术;随着5G技术的诞生,目前许多国家和地区对5G商用高度重视,已竞相展开5G网络技术开发。工信部此前发布的《信息通信行业发展规划(2016-2020年)》明确提出, 2018年进行5G试验组网,2019年启动5G网络建设,2020年正式推出5G商用服务; 目前,为抢占市场,包括中兴、华为、高通、爱立信、诺基亚在内的全球通信企业,均已围绕5G展开积极布局, 因此,在5G网络快速发展的时刻,与之配套的5G天线产品将获得爆发式增长。
在5G网络中,优先布局的是5G基站,与PCB相关的核心产品是5G天线PCB,而MIMO天线是产品加工的关键技术。MIMO 天线相对于传统基站天线,其形态差异为阵列天线设计,数量非常多,且单元具备独立收发能力,相当于多天线单元同时收发数据,这就对产品的一致性提出更高要求,其核心指标为幅度极差≤1.0db。而要实现此指标要求, 5G天线A/B板的耦合极差需控制在0.015mm以内,目前按常规方法很难实现。
技术问题
现有技术中,目前幅度指标主要由终端客户负责测试,需元器件贴片后才能进行,属事后检测,一旦出现幅度超差,需重新配对或调试,费时费力,严重偏差的需报废处理,成本高昂,因此需开发一种PCB事前的检测方法,以准确体现PCB产品的一致性,降低终端调试成本。
同时,由于影响幅度一致性的主要因素有:铜厚、线宽、介质厚度及介电常数等,其中介质厚度及介电常数主要由板材性能决定,而铜厚、及线宽精度则与PCB加工直接相关,为实现幅度极差≤1.0db的要求,5G天线A/B板的耦合极差需控制在0.015mm以内,目前常规工艺很难满足,尤其量产质量难以保证。因此,如何稳定高效地保证量产一致性,成为PCB业界有待解决的难题。
技术解决方案
有鉴于此,本发明提供一种5G天线PCB幅度一致性的控制方法,本发明可以稳定高效地保证5G天线量产的一致性,且在PCB阶段可以准确检测,从而降低终端客户调试成本。
 本发明的技术方案为:
一种5G天线PCB幅度一致性的控制方法,其特征在于,包括5G天线PCB的一致性加工方法和5G天线PCB一致性检测方法;
所述5G天线PCB的一致性加工方法包括以下:
A、铜厚及电镀均匀性控制;
B、线宽精度控制;
C、耦合线距极差控制;
D、产品阻抗一致性控制。
进一步的,所述铜厚及电镀均匀性控制的方法包括:
A1、盲孔板预先减铜:1OZ减薄到0.33 OZ,控制铜厚公差±2.0um以内;
A2、VCP电镀控制铜厚及均匀性:±5um
A3、砂带研磨后全测面铜:按40um标准值控制,公差±3.0um。
进一步的,所述线宽精度控制的方法包括:
B1、优化蚀刻参数,找出最佳蚀刻因子;
B2、根据侧蚀量,修正工程线宽补偿值;
进一步的,所述耦合线距极差控制的方法包括:
C1、工程线距检测:偏差±0.01mil;
C2、图形转移精度控制:LDI激光成像,极差≤0.010mm;
C3、蚀刻一致性控制:线路同步蚀刻;
C4、首、尾件测量极差:极差≤0.015mm;
进一步的,所述产品阻抗一致性控制的方法为:四周阻抗条的阻抗公差按±2%控制,批次最大极差≤2欧姆。
本发明中,通过产品一致性加工技术中5G天线特殊设计,工程对所有阵列天线的耦合线距及线宽进行检测,控制偏差±0.01mil;同时参考耦合线,在工艺边四周增设阻抗条,为一致性控制提供测量依据;通过对铜厚、图形转移精度、线宽蚀刻精度及一致性控制,实现耦合线距蚀刻极差≤0.015mm的加工要求,并达到阻抗公差±2%的高精度加工,确保产品加工的一致性。       
进一步的,所述5G天线PCB一致性检测方法包括以下:
E、工程特殊设计;
F、找出阻抗偏差与幅度一致性的相互关系,确定最大极差控制范围;
G、序列号匹配。
进一步的,所述工程特殊设计包括,参考耦合线,在工艺边四周均设计阻抗条。
进一步的,所述序列号匹配的方法为:ET测试后全测阻抗,根据阻抗极差匹配序列号,从而确保5G天线A/B板幅度的一致性。
特别的,本申请中涉及软件、电路程序的技术特征,其功能的实现属于现有技术,本申请技术方案的实质是对硬件部分的组成以及连接关系进行的改进,并不涉及软件程序或电路结构本身的改进。
有益效果
本发明中提供的产品一致性检测方法,幅度及一致性通常需终端客户在元器件贴片后才能进行测试,属事后检测,一旦出现幅度超差,需重新配对或调试,费时费力,严重偏差的需报废处理,成本高昂;而采用本检测方法,可根据阻抗偏差与幅度一致性的相互关系,在PCB阶段进行事前检测,然后配对序列号,从而降低终端调试成本。
附图说明
图1为本发明一实施例的工艺流程图。
本发明的最佳实施方式
一种5G天线PCB幅度一致性的控制方法,其特征在于,包括5G天线PCB的一致性加工方法和5G天线PCB一致性检测方法;
所述5G天线PCB的一致性加工方法包括以下:
A、铜厚及电镀均匀性控制;
B、线宽精度控制;
C、耦合线距极差控制;
D、产品阻抗一致性控制。
进一步的,所述铜厚及电镀均匀性控制的方法包括:
A1、盲孔板预先减铜:1OZ减薄到0.33 OZ,控制铜厚公差±2.0um以内;
A2、VCP电镀控制铜厚及均匀性:±5um
A3、砂带研磨后全测面铜:按40um标准值控制,公差±3.0um。
进一步的,所述线宽精度控制的方法包括:
B1、优化蚀刻参数,找出最佳蚀刻因子;
B2、根据侧蚀量,修正工程线宽补偿值;
进一步的,所述耦合线距极差控制的方法包括:
C1、工程线距检测:偏差±0.01mil;
C2、图形转移精度控制:LDI激光成像,极差≤0.010mm;
C3、蚀刻一致性控制:线路同步蚀刻;
C4、首、尾件测量极差:极差≤0.015mm;
进一步的,所述产品阻抗一致性控制的方法为:四周阻抗条的阻抗公差按±2%控制,批次最大极差≤2欧姆。
本发明中,通过产品一致性加工技术中5G天线特殊设计,工程对所有阵列天线的耦合线距及线宽进行检测,控制偏差±0.01mil;同时参考耦合线,在工艺边四周增设阻抗条,为一致性控制提供测量依据;通过对铜厚、图形转移精度、线宽蚀刻精度及一致性控制,实现耦合线距蚀刻极差≤0.015mm的加工要求,并达到阻抗公差±2%的高精度加工,确保产品加工的一致性。       
进一步的,所述5G天线PCB一致性检测方法包括以下:
E、工程特殊设计;
F、找出阻抗偏差与幅度一致性的相互关系,确定最大极差控制范围;
G、序列号匹配。
进一步的,所述工程特殊设计包括,参考耦合线,在工艺边四周均设计阻抗条。
进一步的,所述序列号匹配的方法为:ET测试后全测阻抗,根据阻抗极差匹配序列号,从而确保5G天线A/B板幅度的一致性。
本发明的实施方式
为使本发明的目的、技术方案及优点更加清楚明白,以下结合具体实施方式,对本发明进行进一步的详细说明。应当理解的是,此处所描述的具体实施方式仅用以解释本发明,并不限定本发明的保护范围。
实施例1
一种5G天线PCB幅度一致性的控制方法,其特征在于,包括5G天线PCB的一致性加工方法和5G天线PCB一致性检测方法;
所述5G天线PCB的一致性加工方法包括以下:
A、铜厚及电镀均匀性控制;
B、线宽精度控制;
C、耦合线距极差控制;
D、产品阻抗一致性控制。
进一步的,所述铜厚及电镀均匀性控制的方法包括:
A1、盲孔板预先减铜:1OZ减薄到0.33 OZ,控制铜厚公差±2.0um以内;
A2、VCP电镀控制铜厚及均匀性:±5um
A3、砂带研磨后全测面铜:按40um标准值控制,公差±3.0um。
进一步的,所述线宽精度控制的方法包括:
B1、优化蚀刻参数,找出最佳蚀刻因子;
B2、根据侧蚀量,修正工程线宽补偿值;
进一步的,所述耦合线距极差控制的方法包括:
C1、工程线距检测:偏差±0.01mil;
C2、图形转移精度控制:LDI激光成像,极差≤0.010mm;
C3、蚀刻一致性控制:线路同步蚀刻;
C4、首、尾件测量极差:极差≤0.015mm;
进一步的,所述产品阻抗一致性控制的方法为:四周阻抗条的阻抗公差按±2%控制,批次最大极差≤2欧姆。
本发明中,通过产品一致性加工技术中5G天线特殊设计,工程对所有阵列天线的耦合线距及线宽进行检测,控制偏差±0.01mil;同时参考耦合线,在工艺边四周增设阻抗条,为一致性控制提供测量依据;通过对铜厚、图形转移精度、线宽蚀刻精度及一致性控制,实现耦合线距蚀刻极差≤0.015mm的加工要求,并达到阻抗公差±2%的高精度加工,确保产品加工的一致性。       
进一步的,所述5G天线PCB一致性检测方法包括以下:
E、工程特殊设计;
F、找出阻抗偏差与幅度一致性的相互关系,确定最大极差控制范围;
G、序列号匹配。
进一步的,所述工程特殊设计包括,参考耦合线,在工艺边四周均设计阻抗条。
进一步的,所述序列号匹配的方法为:ET测试后全测阻抗,根据阻抗极差匹配序列号,从而确保5G天线A/B板幅度的一致性。
本发明中提供的产品一致性检测方法,幅度及一致性通常需终端客户在元器件贴片后才能进行测试,属事后检测,一旦出现幅度超差,需重新配对或调试,费时费力,严重偏差的需报废处理,成本高昂;而采用本检测方法,可根据阻抗偏差与幅度一致性的相互关系,在PCB阶段进行事前检测,然后配对序列号,从而降低终端调试成本。
 
实施例2
本实施例提供一种5G天线PCB幅度一致性的控制方法,优选的,本实施例是适用于3层5G天线PCB幅度一致性的控制;具体包括以下:
1、天线PCB工程特殊设计:工程线宽检测:对所有阵列天线的耦合线距及线宽进行检测,控制偏差±0.01mil;工程特殊设计: 参考耦合线,在工艺边四周均设计阻抗条,为一致性控制提供测量依据。
2、铜厚及均匀性控制:
2.1盲孔 L12铜层减薄均匀性控制
 1.>减铜参数测试
Figure dest_path_image001
 
2.> 按方案4减铜,采用正反两次减铜方式,上下两面铜厚可控制在11-14un,符合12±2um控制要求。
2.2盲孔电镀均匀性控制
 1.>盲孔电镀参数
Figure 796642dest_path_image002
 2.> 按方案2进行盲孔电镀,铜厚可控制在38-44un,符合40±5um控制要求。
 
2.3盲孔树脂塞孔+砂带研磨后铜厚控制
 1.>砂带研磨参数
Figure dest_path_image003
 2.> 砂带研磨后全测面铜,按40±3um加严控制。
 
3、图形转移精度控制
 1.> 图形转移能力测试
Figure 589149dest_path_image004
 2.> 采用最优方案,可以满足5G天线产品图形转移极差≤10um的精度要求。
4、蚀刻质量及一致性控制
 1>蚀刻因子测试
Figure dest_path_image005
 
 2.>蚀刻线宽一致性控制
①按方案3参数(压力2.8-2.9kg,速度1.7m/min,耦合线朝下喷)进行蚀刻;
②为进一步缩小蚀刻极差,A/B板安排同步蚀刻;
③蚀刻后测量首、尾件蚀刻精度,耦合间距极差≤15um控制。
④蚀刻测试数据(32组耦合天线)
Figure dest_path_image007
 
5、产品阻抗测试
 1.>产品按标准流程从内层压合做到外层阻焊固化+ET测试;然后全测阻抗。
 2.>阻抗测试数据
Figure dest_path_image009
 
6、阻抗极差与幅度一致性的相互关系
1.>根据阻抗测试数据,按阻抗极差梯度进行幅度值测试
5G天线 A/B板阻抗值 阻抗极差 幅度一致性(极差) 要求值 测试结果
001 79.0-81.0 2.0 1.3deb ≤1.0db NG
002 79.1-80.8 1.7 1.1db ≤1.0db NG
003 79.2-80.2 1.5 0.97db ≤1.0db OK
004 79.2-80.4 1.2 0.83db ≤1.0db OK
005 79.2-80.2 1.0 0.71db ≤1.0db OK
2.>阻抗极差与幅度一致性有较强的相互关系,将阻抗极差控制在1.5欧姆以内,可以达到幅度≤1.0db的一致性要求。
 
7、产品一致性控制
1.> ET测试后全测阻抗,并在阻抗条上注明测试值;
2.> 根据阻抗值进行A/B板配对,要求极差≤1.5欧姆,然后打印序列号,即A001…A***和B001…B***,从而确保5G天线A/B板幅度的一致性。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
此外,应当理解,虽然本说明书按照实施方式加以描述,但并非每个实施方式仅包含一个独立的技术方案,说明书的这种叙述方式仅仅是为清楚起见,本领域技术人员应当将说明书作为一个整体,各实施例中的技术方案也可以经适当组合,形成本领域技术人员可以理解的其他实施方式。需注意的是,本发明中所未详细描述的技术特征,均可以通过本领域任一现有技术实现。
工业实用性
采用本检测方法,可根据阻抗偏差与幅度一致性的相互关系,在PCB阶段进行事前检测,然后配对序列号,从而降低终端调试成本。

Claims (8)

  1. 一种5G天线PCB幅度一致性的控制方法,其特征在于,包括5G天线PCB的一致性加工方法和5G天线PCB一致性检测方法;
    所述5G天线PCB的一致性加工方法包括以下:
    A、铜厚及电镀均匀性控制;
    B、线宽精度控制;
    C、耦合线距极差控制;
    D、产品阻抗一致性控制。
  2. 根据权利要求1所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述5G天线PCB一致性检测方法包括以下:
    E、工程特殊设计;
    F、找出阻抗偏差与幅度一致性的相互关系,确定最大极差控制范围;
    G、序列号匹配。
  3. 根据权利要求1所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述铜厚及电镀均匀性控制的方法包括:
    A1、盲孔板预先减铜:1OZ减薄到0.33 OZ,控制铜厚公差±2.0um以内;
    A2、VCP电镀控制铜厚及均匀性:±5um
    A3、砂带研磨后全测面铜:按40um标准值控制,公差±3.0um。
  4. 根据权利要求1所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述线宽精度控制的方法包括:
    B1、优化蚀刻参数,找出最佳蚀刻因子;
    B2、根据侧蚀量,修正工程线宽补偿值。
  5. 根据权利要求1所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述耦合线距极差控制的方法包括:
    C1、工程线距检测:偏差±0.01mil;
    C2、图形转移精度控制:LDI激光成像,极差≤0.010mm;
    C3、蚀刻一致性控制:线路同步蚀刻;
    C4、首、尾件测量极差:极差≤0.015mm。
  6. 根据权利要求1所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述产品阻抗一致性控制的方法为:四周阻抗条的阻抗公差按±2%控制,批次最大极差≤2欧姆。
  7. 根据权利要求2所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述工程特殊设计包括,参考耦合线,在工艺边四周均设计阻抗条。
  8. 根据权利要求2所述的5G天线PCB幅度一致性的控制方法,其特征在于,所述序列号匹配的方法为:ET测试后全测阻抗,根据阻抗极差匹配序列号,从而确保5G天线A/B板幅度的一致性。
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