找到约 18873 条相关结果
首先，要考虑PCB的尺寸大小.PCB尺寸过大时，印制线条长 ... 噪声能力下降，成本也增加；PCB尺寸过小，则散热不好， ... 邻近线条易受干扰。在确定PCB尺寸后．再确窄特殊元件 ...
... in Automatic Optical Inspection（AOI） of PCB.Based on analyzing the holistic configuration and data ... on,the standard image which is used for PCB Automatic Optical Inspection is composed finally.The experimental ...
... generator and field ramp generator. Each part of PCB would be introduced including function, testing process, failures ...
... 进行了分析研究。为以后的PCB板时钟电路的设计提供了思路 ... compatibility problem caused by the clock in PCB integrated circuit board, electromagnetic compatible problems in ...
文章介绍了电路设计的基本步骤，PCB板布线的一般原则，总结了PCB设计中布线存在的不足，提出了布线的一些具体做法和改进措施，旨在设计出符合要求的PCB板，提高PCB板的设计能力。
... 技术的快速发展,球栅阵列结构PCB(BGA)在集成电路设计中的应用日渐广泛,PCB焊点缺陷检测的受关注程度 ... 。基于此,详细论述了高分辨率PCB板焊点缺陷检测系统的设计 ... 性能,并给出了其他高分辨率PCB板焊点缺陷检测思路,希望由此 ...
... this paper,we introduce five methods of making PCB by hand and analyze the electrical characteristics of PCB made by different methods.The important problems in ...
... 杂质的方法。Copper sulfate used in PCB belongs to electroplating grade. This paper described methods of preparation copper sulfate used in PCB, analyzed the possible source of organic impurities in ...
