A base with metal circuit and its production process and voice coil motor

Abstract

The invention relates to a base with a metal circuit, its manufacturing process and a voice coil motor. The base includes: a plurality of electronic components, a double-layer metal circuit welded with the electronic components, and plastic injection molded integrally with the metal circuit. body, the metal circuit includes a plurality of branches, one end of the plurality of branches is arranged in parallel and at intervals to form pins exposed outside the plastic body, and the other end of the branches is arranged to form an electrical The solder feet connected to the pins of the electronic components, a connection portion is formed between the solder legs of each branch and the pins, and the metal circuit includes a first layer arranged at intervals in a first direction. A metal circuit and a second metal circuit, the connecting portion of at least one branch of the first metal circuit and the connecting portion of at least one branch of the second metal circuit are in the first metal circuit Overlapping projections in one direction enables the first metal circuit and the second metal circuit to be stamped and formed by overlapping, which solves the problem of limited internal space of existing products, increases the arrangement density of the metal circuit, and expands the circuit space.

Description

technical field [0001] The invention relates to a base with a metal circuit, its production process and a voice coil motor, in particular to a base used in the field of electronic equipment, its production process and a voice coil motor. Background technique [0002] Existing bases and voice coil motors with metal circuits usually use flexible FPC surface assembly technology to achieve circuit connectivity. However, due to the high requirements of the assembly process on the accuracy of the shape and position tolerance of the components themselves and the repeat positioning accuracy, the current assembly has a high overall defect rate and poor mass production. [0003] Another example is the patent with the application number CN201811114105.4 and the invention application with the publication number CN110703536A. These patents embed a single-layer metal circuit inside the plastic product and connect it with the electronic components to achieve the function of line connection...

AI Technical Summary

Problems solved by technology

However, due to the high requirements of the assembly process on the precision of the shape and position tolerance of the parts themselves, the repeat positioning accuracy, etc., the overall defect rate of the assembly is currently high, and the mass production is not good.

[0003] Another example is the patent with the application number CN201811114105.4 and the invention application with the publication number CN110703536A. These patents embed a single-layer metal circuit inside the plastic product and connect it with the electronic components to achieve the function of line connection. Under the premise, the number of metal circuits in single-layer metal circuit design is limited; with the development of the market, the demand for product functions is increasing, and the number of metal circuits inside the product is increasing. If multiple electronic components need to appear on the circuit board , but the lateral minimum width of a branch of a single circuit board is predetermined, and the area that may be covered by a fixed number of electronic component pin branches is fixed. If there are multiple electronic components, the voice coil drive motor The layout area of ​​one plane may be insufficient, requiring layout planes of multiple circuits

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