The IPC’s test method on cleanness of printed circuit board were improved.
对离子色谱法检测印刷电路板清洁度的IPC(电子电路互连和包装标准)方法做出了进一步改进,提出了水浴加热联合氮吹样品的前处理方法,有效的去除了异丙醇对测量的干扰,而且对样品进行了浓缩;对样品中的有机酸进行了有效的分离和检测。
Galvanic current method for measuring electrodeposition velocity of immersion silver plating for printed circuit board;
一种新的印刷电路板浸银镀速的测定方法
Finishing of printed circuit board in ethylenediamine-containing immersion silver system;
印刷电路板的乙二胺络合浸镀银工艺
Integrated treatment and reuse of wastewater from printed circuit board production;
印刷电路板生产废水的综合治理及废水回用
The Recovery of EDTA in Waste PCB Chemical-copper Solution;
印刷电路板化学镀铜液回收EDTA的研究
The Strain Electrical Measurement of Automatism Incising Machine with PCB;
自动切割机切割印刷电路板应变电测量
Hardware System of PCB Flying Probe Checking up System;
印刷电路板飞针检测硬件系统
This paper recommends some methods to improve the performance of digital system when designing printed circuit board(PCB).
针对高速、高精度数字系统对电磁兼容性的严格要求,分析了系统电源、地的重要性以及影响高速模数转换器(ADC)和数模转换器(DAC)电路性能的主要因素;在设计印刷电路板时,采用隔离数字部分与模拟部分、抑制地弹噪声等方法优化系统电源,通过改善ABC、DAC电路的供电方式、优化采样时钟和高速数字信号线来提高系统抗电磁干扰的能力;并比较了一个失败案例和一个成功案例,后者较前者带外抑制指标提高约15dB,表明采用所述方法可以有效改善数字系统的电磁兼容性。
printed circuit board
ph.1. 印刷电路板
printed circuit boards, PCBs, integrated circuitry diagrams
印刷电路板, 印刷电路板, 集成电路图
fibre-glass printed circuit board
玻璃纤维印刷电路板
A printed circuit connector contact.
印刷电路板连接器触点。
twin surface print circuit light-sensitizer
双面印刷电路板感光机
Faulty cluster printed circuit board
有故障的印刷电路板
A printed circuit board that plugs into a mother board.
插入主机板(母板)中的一种印刷电路板。
High-voltage Electrostatic Separation for Fragmentized Printed Circuit Boards;
破碎废弃印刷电路板的高压静电分选
REPLACE INSTRUMENT CLUSTER CIRCUIT BOARD (MIC).
更换仪表组印刷电路板(MIC)。
Design of High-Speed Printed Circuit Board and the DDR2 Simulation;
高速印刷电路板的设计及DDR2仿真
Simulation and Detection of Printed Circuit Board Based on CAD;
对基于CAD的印刷电路板仿真与检测
Utilize the Protel DXP to Design and Make Exquisite Printed-Circuit-Board;
利用Protel DXP设计制作精美印刷电路板
A Study on Treatment of Wastewater from Printed Circuit Board Production
印刷电路板生产废水处理工艺的研究
PYROLYSIS CHARACTERISTIC OF WASTE PHENOLIC-RESIN-BASED PRINTED CIRCUIT BOARDS
废旧酚醛树脂印刷电路板的热解特征
Study on modal analysis of PCBA based on ABAQUS
基于ABAQUS的印刷电路板组件模态研究
high density fine pitch printed circuit board
高密度细线距印刷电路板;高密度细线距线路板
The Study of Naked Board and Sticked Parcel Components on Printed Circuit Board;
印刷电路板光板和贴片组件检测系统的研究
PCBs, wiring blueprints, electrical and electronic devices
印刷电路板, 接线设计图, 电气和电子设备
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