免费观看国产黄MV_国产日韩精品91_日韩中文无线码在线_岛国大片在线观看_国产 无码 精彩视频_最近免费中文字幕_出差被公侵犯在线观看_无码乱伦免费国产_欧美日韩视频专区在线播放_深夜福利嘿咻嘿咻动态图

Hello, welcome to the website of Shenzhen JingZuan Circuit Board Co., Ltd.! Sitemap |Chinese| Englsih
Hotline:

86-755-27595539

Current position:Home / News / Company dynamics

Company dynamics

Selection basis of PCB substrate material

Pcb gold-plated plateThe process cost is the highest among all plates, but currently the most stable of all existing plates and is most suitable for use in lead-free processes. Especially in some electronic products with high unit prices or requiring high

2019-02-18

How to judge the quality of multilayer PCB circuit boards from color

first,PCB as printed circuit boardIt mainly provides the interconnection between electronic components. There is no direct relationship between color and performance, and different pigments will not have much impact on electrical performance. However, the

2019-02-18

About the national interpretation of the content of the quality management specification document of the circuit board factory?

In order to strengthen the management of the PCB factory, guide the industrial transformation and upgrading and structural adjustment, and promote the sustainable and healthy development of the PCB industry, according to the relevant national laws, regula

2019-01-16

What are the basic functions of printed circuit board manufacturing?

Printed circuit board systemThe conductive pattern refers to the conductive pattern made of printed circuit, printed component or combination of the two on the insulating substrate according to the predetermined design, and the conductive pattern that pro

2019-01-16