Flexible circuit board and manufacturing method thereof

A technology of flexible circuit boards and manufacturing methods, which is applied in the manufacture of printed circuits, removal of conductive materials by chemical/electrolytic methods, printed circuits, etc., can solve problems such as monopoly and high material costs, and achieve ultra-low loss signal transmission, reduce Manufacturing cost, effect of improving transmission quality

CN106332434AActive Publication Date: 2017-01-11AVARY HLDG (SHENZHEN) CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-01-11

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Abstract

The invention relates to a flexible circuit board, which comprises a plurality of copper clad substrates, a line pattern, a plurality of bonding colloids corresponding to the plurality of copper clad substrates, and a plurality of conductive holes; each copper clad substrate is provided with an insulating base material and an outer-layer line; the line pattern comprises a linear signal line, two ground lines and two hollow areas; the two ground lines are arranged at two sides of the linear signal line and are parallel to each other; the plurality of copper clad substrates are located at two reverse sides of the line pattern; each bonding colloid is stacked between the line pattern and the corresponding copper clad substrate; a gel-free slot is formed in each bonding colloid; the slots of the plurality of bonding colloids and the two hollow areas form an air dielectric layer to coat the linear signal line; the slot of each bonding colloid is aligned at the linear signal line; and the linear signal line is spaced from the plurality of bonding colloids to form a suspended state. The plurality of conductive holes are electrically connected with the plurality of outer-layer lines and the two ground lines. The invention further relates to a manufacturing method of the flexible circuit board.
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Description

Technical field

[0001] The invention relates to a printed circuit board technology, in particular to a flexible circuit board and a manufacturing method of the flexible circuit board. Background technique

[0002] figure 1 It is a schematic cross-sectional view of a conventional high-frequency signal line structure 100. The high-frequency signal line structure 100 includes two ground pattern layers 110, one signal line 120, two dielectric layers 130 and a plurality of conductive holes 150. Wherein, the dielectric layer 130 completely covers the signal line 120 so that the signal line 120 is disposed between the two ground pattern layers 110.

[0003] figure 2 for figure 1 A layered three-dimensional schematic diagram of the mid- and high-frequency signal line structure 100. The conductive holes 150 are equidistantly distributed on both sides of the signal line 120 and conduct the ground pattern layers 110. In other words, through the plurality of ground pattern layers 110, the p...

Examples

Embodiment Construction

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the flexible circuit board and its manufacturing method of the present invention will be detailed below with reference to the drawings and preferred embodiments. described as follows.

[0028] The first embodiment of the present invention discloses a flexible circuit board 200 that uses air as a dielectric layer to cover the linear signal line 221 so that the linear signal line 221 is in a suspended state. See image 3 As shown, it is a schematic cross-sectional view of the flexible circuit board 200. Figure 4 Is a schematic diagram of the flexible circuit board 200 from the inside to the outside of the circuit pattern, adhesive glue and copper-clad substrate, Figure 5 Middle (A)-(F) are schematic cross-sectional views of each step of the manufacturing method of the fl...