1. Adopt shielding measures It is an effective way to deal with the crosstalk problem that the circuit board provides packet ground for high-speed signals. But. It makes the limited wiring area more congested. In addition, in order to achieve the desired purpose of ground wire shielding, the distance between ground points on the ground [...]
The utility model relates to a high-density interconnection circuit board of any layer, which includes at least two layers of inner core plates. The inner layer board core is provided with several embedded holes and core grooves. The core groove can provide considerable tension for the copper drilling, improve the yield, coating copper on the [...]
On April 29, the afternoon closing news showed that the concept of printed circuit board fell, led by 0.802% of Shanghai Electric Power Co., Ltd., and shares of Zhengye technology, Shenghong technology, Eaton electronics and Mingyang circuit fell. The listed companies of leading shares of PCB include: Shanghai Electric Power Co., Ltd.: leading position. PCB [...]
Basic knowledge of PCB copper foil 1、 Brief introduction of copper foil Copper foil: a kind of cathode electrolytic material, a thin, continuous metal foil deposited on the substrate of PCB, which is used as the conductor of PCB. It is easy to adhere to the insulating layer, accept the printing protection layer, and form [...]
1) There are two kinds of circuit board connectors: single lead and multi lead, as shown in Figure 119（ a) For single lead connector, (b) for multi lead connector. They are characterized by flexible use, small occupation area, easy to plug, pull and so on. The structure of the utility model is that the socket [...]
With the development of science and technology, the measurement accuracy of various components is required to be higher and higher, so the requirements of image measuring instrument are also more and more stringent. Image measuring instrument is the product of the perfect combination of traditional optical projection and computer, which is a technological leap compared [...]
On June 24, Zhongjing Electronics (002579) answered the concerns of investors on the investor relations platform. Investor: due to the epidemic, the production capacity of flexible circuit board manufacturers in Southeast Asia and South Korea is affected. Has the price of flexible products of Zhongjing electronics increased? Has the performance improved significantly? Secretary of Zhongjing [...]
Real time monitoring of wound healing is still a major challenge for clinical tissue regeneration. Biomaterial guided on-site monitoring of wound healing is needed. Recently, Shanghai Univer professor Gao Jie / Zhejiang Province People's Hospital Dr. Zhang Lei / Fudan University Zhongshan Hospital Dr. Jiang Libo / Hubei University professor Li Yulin research team proposed [...]
Press fit technology is most widely used in motor assembly. Such as pressure bearing to rotor, pressure clip spring, pressure silicon steel sheet to rotor, pressure commutator, pressure bearing to shell and so on. In the motor assembly industry, many processes such as commutator bushing, motor shaft end bearing, rotor stator assembly, motor shaft core [...]
China is one of the few countries in the world that have mastered advanced superconducting material technology Over the past decades, scientific and technological workers have been unswervingly committed to tackling key problems Expect to find more new superconducting materials And expand its application field through mechanical modification Superconductors are superconductors A conductor with zero [...]