Method for restraining electromagnetic radiation of coating conducting membrane on screw

Abstract

The invention relates to a method for restraining the electromagnetic radiation of coating conducting membrane on a screw. The method adopts the step of connecting the screw on a printed circuit board by adopting the coating conducting membrane, so as to directly improve the grounding efficiency of the printed circuit board and realize the restraint to electromagnetic radiation. Accordingly, the method can effectively reduce the Data strobe electromagnetic radiation of a DDR memory, and effectively restrain the electric wave harmful to human body and brought by EMC.

Description

technical field [0001] The invention relates to a method for suppressing electromagnetic wave radiation, in particular to a method for suppressing electromagnetic wave radiation in which a conduction film is coated on a screw. Background technique [0002] The electromagnetic interference of the digital filter (Data strobe) of the double-speed (Double Data Rate, DDR) memory on the printed circuit board is a very common and difficult problem. During the Electromagnetic Compatibility (EMC) test, due to the high speed of the DDR memory The transmission of frequent signals produces strong electromagnetic wave radiation in the high-frequency region near 1GHz. Especially in the era of Vista, the requirements for the speed and capacity of DDR memory are higher, which also highlights the seriousness of this problem. Now the problem of shielding DDR strobe radiation is nothing more than adjusting the capacitance value around the relevant memory and paying attention to the layout of ...

AI Technical Summary

Problems solved by technology

However, due to the fact that the data transmission speed is getting faster and the packet multiple is growing, and there are more and more digital and analog compatibility requirements for input / output (I / O), the layer space definition of printed circuit board design is getting narrower and narrower, so in Under such harsh conditions, the strobe interference problem of DDR cannot be effectively suppressed

[0003] This shows that above-mentioned existing method for shielding DDR Strobe electromagnetic wave radiation obviously still has inconvenience and defect in method and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general method has no suitable method to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

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