Making method of single-side double contact flexible circuit board

Abstract

The invention discloses a single-side double contact flexible circuit board and a making method thereof. The single-side double contact flexible circuit board comprises a substrate layer, a copper foil layer and a covering film layer, wherein the substrate layer and the copper foil layer are both a single-side copper clad board. The making method comprises the following steps of: firstly, blanking, making a line on a copper foil surface of the single-side copper clad board, adhering a covering film with a drill hole and a punched opening on a covering film at the top layer, laminating and curing; secondly, laser-cutting an opening of a substrate at the bottom layer on the substrate surface of the single-side copper clad board with the made line, wherein the opening size of the substrate at the bottom layer is a little less than the size of a finger area of the covering film at the top layer; thirdly, removing a foreign body at a bare copper part of a product by adopting modes of plasma treatment and surface treatment; and fourthly, carrying out procedures of surface coating, character screen printing, electric measurement and punching forming to obtain the single-side double contact flexible circuit board, and therefore, the periphery of a golden finger is supported by the copper clad board substrate at the bottom layer, the buckling deformation resistance capacity of the golden finger in the production process and the subsequent use process is strengthened, the product making yield rate is enhanced, the cost waste is reduced, and the circuit board has the advantages of simple structure and good performance.

Description

technical field [0001] The invention relates to a flexible circuit board and a manufacturing method thereof, in particular to a manufacturing method of a single-sided double-contact flexible circuit board. Background technique [0002] With the miniaturization and lightweight development of various electronic equipment, it is required to use flexible circuit boards with thin thickness, light weight, superior bending performance and multi-functionality as important accessories of electronic equipment, single-sided flexible circuit boards Only the pad side can be connected to the electronic components. Although the double-sided flexible circuit board can be connected to the electronic components on both sides, the thickness of the socket end is relatively thick. Therefore, the single-sided double-contact flexible circuit board is thus produced. [0003] At present, the structure diagram of the commonly used single-sided double-contact flexible circuit board is as follows: f...

AI Technical Summary

Problems solved by technology

[0004]However, the gold finger 6 of the single-sided double-contact flexible circuit board produced by this process is in a suspended state, so it cannot be used during the production process and subsequent use. Avoid wrinkling, deformation, or even breakage, which will affect the yield of the product, and the production cost will remain high

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