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