Anti-EMI (Electromagnetic Interference) circuit module and preparation method thereof
A circuit module, anti-electromagnetic wave technology, applied in printed circuit parts, electrical components, magnetic field/electric field shielding and other directions, can solve the problems of increasing manufacturing costs, reducing the thickness and limitations of electronic products, etc.
Active Publication Date: 2012-08-22
HUANWEI ELECTRONICS SHANGHAI CO LTD
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Problems solved by technology
However, due to the continuous rise in metal prices in recent years, the industry has relatively increased the manufacturing cost in order to comply with the official EMI standard. On the other hand, because the metal itself has a certain thickness, it is difficult to reduce the thickness of electronic products. limitations
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[0038] The invention provides a circuit module for preventing electromagnetic wave interference and a manufacturing method thereof, such as figure 1 and Figure 2 to Figure 8 Shown is a cross-sectional view of the steps of the manufacturing method of the circuit module. The manufacturing method of circuit module of the present invention comprises steps as follows: Refer to figure 1 and figure 2 , first prepare a circuit board 1, and the inside of the circuit board 1 is embedded with several ground traces 11, and the upper surface of the circuit board 1 is fixed with several electronic components 12, such as chips, capacitors, resistors, etc., the circuit board 1 There are columnar marks 13 protruding from the upper surface, and these marks 13 are made of conductive material, and the bottom ends of each pair of marks 13 respectively touch the two ends of each ground trace 11 . The purpose of these marks 13 is the reference of laying out these electronic components 12 on thi...
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The invention relates to an anti-EMI (Electromagnetic Interference) circuit module and a preparation method thereof. The anti-EMI circuit module comprises a circuit board, an encapsulating glue layer and a conductive coating layer, wherein the circuit board is provided with a ground line orbit, a plurality of electronic elements and a plurality of conductive marks in contact with the ground line orbit, the electronic elements are encapsulated into the encapsulating glue layer which is provided with a plurality of grooves, the marks are exposed in the grooves, and the conductive coating layer is arranged on the surface of the encapsulating glue layer and in the grooves and contacts the marks. Accordingly, the collocation of the conductive coating layer, the marks as well as the ground lineorbit is utilized to substitute a publicly-known metal shell so as to achieve the anti-EMI effect likewise, but the anti-EMI circuit module has relatively lower manufacture cost. The invention also provides the manufacture process of the circuit module.
Description
technical field [0001] The invention relates to a circuit module and a manufacturing method thereof, in particular to a circuit module for preventing electromagnetic wave interference and a manufacturing method thereof. Background technique [0002] When electronic products are in operation, they will generate electromagnetic waves that interfere with other devices and affect human health and the environment. This phenomenon is called Electromagnetic Interference (EMI). Because it involves human health and environmental protection, there are official EMI standards for electronic products. If electronic products do not meet the EMI standards, they cannot be sold. Therefore, compliance with EMI standards is one of the most important indicators of product quality, and it is also a must for product development. Important specifications that are met. [0003] In order to avoid excessive energy of the interference electromagnetic wave generated by the electronic product, it is kn...
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IPC IPC(8): H05K9/00H05K1/02
Inventor 张卓兴
Owner HUANWEI ELECTRONICS SHANGHAI CO LTD