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Structure and method for manufacturing electronic circuit on metal and plastic injection moulding product

An electronic circuit, plastic injection molding technology, applied in the direction of printed circuit, printed circuit manufacturing, containing printed electrical components, etc., can solve the problems of increasing the difficulty of mobile phone antenna design, inability to play, and corrosion of metal parts.

Inactive Publication Date: 2018-01-09
深圳市微航磁电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Portable communication products represented by mobile phones and notebook computers are highly fashionable and fast in appearance, leading the latest fashion trends in the electronics industry. The latest materials, processes and appearance treatment technologies in the industry are basically first used on mobile phones and notebook computers. Looking at it, the aluminum alloy casing represented by the Apple 6 represents a higher level of mobile phone casing technology. Many mobile phone manufacturers are also competing to launch their own all-metal mobile phones. For a while, the metal body has become a high-end and fashionable mobile phone. However, due to the shielding effect of the metal shell on radio signals, the design of mobile phone antennas is more difficult. Usually, the communication quality of mobile phones with metal bodies is lower than that of mobile phones with plastic bodies.
[0003] The improvement of smart phone technology makes the mobile phone not only a communication tool, but also a wireless personal terminal integrating communication, entertainment, information, social networking, network and other functions. With the mobile communication from 2G to 4G and 5G, the manufacturing technology experience of mobile phone antennas After several generations of changes, at present, LDS (Laser Direct Structuring laser direct writing circuit forming technology, that is, laser direct structuring circuit structure technology) has gradually become the mainstream processing technology for electronic circuits such as mobile phone antennas. The antenna is directly processed on the plastic shell, making the appearance of the mobile phone more slender and thinner. This antenna processing technology is easy to realize on the plastic structure of the mobile phone shell, but for the structure nested with metal and plastic, subsequent LDS processing The electroless plating link will cause corrosion to the metal part. Although the latest nano-injection molding technology has effectively solved the problem of the bonding force between metal and plastic and the strength of the shell, it has brought difficulties to the LDS process for antenna processing. The flexible antenna board cannot meet the performance requirements, nor can it take advantage of the nano-injection molding process. On the other hand, in addition to the LDS technology for processing antennas, the use of printing and sputtering processes to manufacture electronic circuits is already mature, and the same problem exists. , the reason is that it is impossible to solve the problem that the metal part will be corroded by the electroless plating solution in the thickening process of the metal-containing plastic workpiece

Method used

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  • Structure and method for manufacturing electronic circuit on metal and plastic injection moulding product
  • Structure and method for manufacturing electronic circuit on metal and plastic injection moulding product
  • Structure and method for manufacturing electronic circuit on metal and plastic injection moulding product

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0022] The implementation of this patent is now described with the processing process of the metal mobile phone shell

[0023] The first step: use forging, injection, die-casting, machining to obtain metal parts;

[0024] The second step: use in-mold injection molding or nano-injection molding to form metal and plastic integration (such as figure 1 shown) workpiece;

[0025] The third step: coating, complete the protective coating on the exposed metal part of the workpiece, such as injection molding coating, spray coating, electrophoresis coating, dipping and other coatings, covering the metal part to form a protective layer of the workpiece (such as figure 2 shown);

[0026] Step 4: On the surface of the plastic area closely combined with the metal, the pattern of the electronic circuit is produced by laser or printing or sputtering, so that the pattern area has metal "seeds", electronic circuit workpieces, by laser or printing or vacuum sputtering The plating process for...

Embodiment example 1

[0031] Antenna processing of metal shells made of aluminum profiles:

[0032] The first step: the profile is cut into the required size block, and the shape and cavity are roughly machined by the CNC milling machine;

[0033] The second step: use the machining center (CNC) to complete the cavity structure processing;

[0034] Step 3: Milling the antenna slot and processing the filled plastic area;

[0035] The fourth step: microporous treatment (T treatment), forming micropores on the surface of the processed aluminum alloy parts;

[0036] The fifth step: Nano-injection molding, pouring plastic in the plastic-filled area of ​​aluminum alloy to form a shell workpiece closely connected with aluminum alloy and plastic;

[0037] Step 6: Coating, use the packaging material to cover the gold surface of the aluminum box;

[0038] The seventh step: antenna processing, processing the antenna on the plastic;

[0039] Step 8: Finishing, complete the 3D shaping of the shell and the fi...

Embodiment example 2

[0045] Antenna processing of metal shells using plates as materials:

[0046] The first step: Open the stamping die, and use the stamping process to process and stamp the aluminum alloy plate out of the shell shape and cavity;

[0047] The second step: use the machining center (CNC) to complete the cavity structure processing;

[0048] Step 3: Mill the antenna slot and the area of ​​the internal plastic structure, and process the filled plastic area;

[0049] The fourth step: microporous treatment (T treatment), forming micropores on the surface of the processed aluminum alloy parts;

[0050] The fifth step: Nano-injection molding, pouring plastic in the plastic-filled area of ​​aluminum alloy to form a shell workpiece closely connected with aluminum alloy and plastic;

[0051] Step 6: Coating, use the packaging material to cover the gold surface of the aluminum box;

[0052] The seventh step: antenna processing, processing the antenna on the plastic;

[0053] The eighth s...

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Abstract

The invention relates to a plastic-metal-electronic circuit structure and a method for manufacturing the same. The structure consists of metal, plastic and an electronic circuit. Specifically, the method comprises the steps: carrying out the internal injection molding and nanometer injection molding of a metal part and a plastic mould and then manufacturing the electronic circuit; carrying out theprotective covering of a metal part in a plastic product on the metal through a wrapping material in order to prevent the metal part from being corroded, and then carrying out the processing of the electronic circuit on the workpiece after wrapping; peeling off the wrapping material after the processing of the electronic circuit and the finish machining of the metal part. The wrapping-processing-peeling method effectively overcomes a difficulty that the metal is corroded at the chemical plating. The method belongs to the field of plastic and metal and electronic module mixed manufacturing andadditional material manufacturing.

Description

technical field [0001] This patent belongs to the field of mixed manufacturing of plastic, metal and electronic components, and additive manufacturing. Background technique [0002] Portable communication products represented by mobile phones and notebook computers are highly fashionable and fast in appearance, leading the latest fashion trends in the electronics industry. The latest materials, processes and appearance treatment technologies in the industry are basically first used on mobile phones and notebook computers. Looking at it, the aluminum alloy casing represented by the Apple 6 represents a higher level of mobile phone casing technology. Many mobile phone manufacturers are also competing to launch their own all-metal mobile phones. For a while, the metal body has become a high-end and fashionable mobile phone. However, due to the shielding effect of the metal shell on radio signals, the design of mobile phone antennas is more difficult. Usually, the communication ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K1/16H05K3/10H05K3/18H01Q1/38
Inventor 周红卫吴维琼
Owner 深圳市微航磁电技术有限公司