LCP target structure

Abstract

The utility model discloses LCP target structure, including copper foil layer and the inside hollow ring, middle solid ring and outside intermittent hollow ring of being arranged on copper foil layer respectively, middle solid ring surrounds the concentricity arrangement of inside hollow ring, outside intermittent hollow ring includes the multiple arc grooves of uniform distribution, and the arc groove of multiple number encloses the annular structure, and the annular structure surrounds the concentricity arrangement of middle solid ring, and the included angle between the line of sight of the end of an arc groove and the center of inside hollow ring and the edge of copper foil layer is theta, 40 DEG <= theta <= 50 DEG. This LCP target structure can reduce the production scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal polymer product processing technology, and in particular to LCP target structure. Background Technology

[0002] In the field of 5G mmW LCP, to balance high-speed transmission and electrical performance, the design often stacks 4-15 layers, increasing the material thickness. As a result, the overall board thickness exceeds the tolerance range of RTR roll-to-roll equipment, forcing a switch to single-sheet processing. After the single-sheet LCP patterning process is completed, each sheet needs to be cut individually. However, traditional targets and cutting machine vision systems are poorly matched, leading to frequent size recognition errors, slice misalignment, high scrap rates, and insufficient efficiency to support mass production. Figure 1 As shown, the existing target structure includes a concentric inner ring 20 and an outer ring 30. The inner ring is formed by a copper foil layer 1 on the LCP, and the outer ring is a ring-shaped gap formed by removing material from the copper foil layer. The contrast and geometric features of the existing target structure are insufficient for stable recognition by high-precision vision algorithms, resulting in positioning errors. The pain points of the existing processing technology can be summarized as follows: First, in sheet processing, the traditional target structure cannot provide a sufficiently accurate positioning reference for the slicing machine, leading to visual alignment misalignment and scrapping. Second, the target structure itself lacks error-proofing design, causing the graphics device to frequently grab the wrong target, further exacerbating the scrapping issues. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an LCP target structure that can reduce the scrap rate of LCP circuit board production.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: an LCP target structure, including a copper foil layer and an inner hollow ring, a middle solid ring, and an outer discontinuous hollow ring respectively disposed on the copper foil layer; the middle solid ring is concentrically arranged around the inner hollow ring; the outer discontinuous hollow ring includes a plurality of evenly distributed arc grooves, the plurality of arc grooves forming a ring structure, the ring structure being concentrically arranged around the middle solid ring, and the angle between the line connecting the end of an arc groove and the center of the inner hollow ring and one side of the copper foil layer is θ, 40°≤θ≤50°.

[0005] In one embodiment, 43°≤θ≤47°.

[0006] In one embodiment, θ = 45°.

[0007] In one embodiment, the angle between the line connecting the end of an arc-shaped groove and the center of the inner hollow ring and the horizontal direction is θ.

[0008] In one embodiment, the inner diameter of the inner hollow ring is 0.6mm-1.0mm, and the outer diameter of the inner hollow ring is 1.4mm-1.8mm.

[0009] In one embodiment, the inner diameter of the inner hollow ring is 0.8 mm, and the outer diameter of the inner hollow ring is 1.6 mm.

[0010] In one embodiment, the outer diameter of the central solid ring is 2.6 mm to 3.0 mm.

[0011] In one embodiment, the outer diameter of the central solid ring is 2.8 mm.

[0012] In one embodiment, the outer diameter of the outer discontinuous hollow ring is 2.8 mm to 3.2 mm.

[0013] In one embodiment, the outer diameter of the outer discontinuous hollow ring is 3.0 mm.

[0014] The beneficial effects of this invention are as follows: Since the inner hollow ring, the middle solid ring, and the outer discontinuous hollow ring form a three-order concentric contrast of "dark-bright-dark" on the copper foil layer, the visual algorithm can quickly lock the center of the circle by relying on the continuous edge of the middle solid ring. Then, using the end of the arc-shaped groove of the outer discontinuous hollow ring as an angle reference, the algorithm uses a fixed included angle relationship of 40°≤θ≤50° to achieve error-proof verification, significantly reducing the probability of errors in the graphics device. At the same time, the discontinuous arc-shaped groove provides multiple sets of identifiable geometric breakpoints in the circumferential direction, enabling the slicer vision system to obtain sub-pixel-level positioning references through multi-point fitting even under conditions of single LCP warping or local reflection. This solves the problem of cutting offset caused by insufficient contrast and lack of angular features in traditional concentric targets in one go, and controls the scrap rate within the allowable range of visual inspection error. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an existing LCP target.

[0017] Figure 2 This is a schematic diagram of the LCP target structure according to Embodiment 1 of this utility model.

[0018] Explanation of icon numbers:

[0019] 1. Copper foil layer; 11. Inner hollow ring; 12. Middle solid ring; 13. Outer discontinuous hollow ring; 131. Arc-shaped groove;

[0020] 2. LCP substrate layer;

[0021] 20. Inner ring; 30. Outer ring. Detailed Implementation

[0022] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0026] Furthermore, if the word "and / or" appears throughout the text, it means that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] Example 1

[0029] Please refer to Figure 2 The first embodiment of this utility model is: an LCP target structure, including an LCP substrate layer 2, a copper foil layer 1, and an inner hollow ring 11, a middle solid ring 12, and an outer discontinuous hollow ring 13 respectively disposed on the copper foil layer 1. The copper foil layer 1 is disposed on the LCP substrate layer 2. The middle solid ring 12 is concentrically arranged around the inner hollow ring 11. The outer discontinuous hollow ring 13 includes a plurality of evenly distributed arc-shaped grooves 131, which form a ring structure. The ring structure is concentrically arranged around the middle solid ring 12. The angle between the line connecting the end of an arc-shaped groove 131 and the center of the inner hollow ring 11 and one side of the copper foil layer 1 is θ, 40°≤θ≤50°, preferably 43°≤θ≤47°. In this embodiment, θ=45°.

[0030] In this embodiment, the angle between the line connecting the end of an arc-shaped groove 131 and the center of the inner hollow ring 11 and the horizontal direction is θ. That is, the side of the copper foil layer 1 that forms an angle θ with the line connecting the end of an arc-shaped groove 131 and the center of the inner hollow ring 11 is set in the horizontal direction.

[0031] The inner diameter of the inner hollow ring 11 is 0.6mm-1.0mm, and the outer diameter of the inner hollow ring 11 is 1.4mm-1.8mm. In this embodiment, the inner diameter of the inner hollow ring 11 is 0.8mm, and the outer diameter of the inner hollow ring 11 is 1.6mm.

[0032] The outer diameter of the solid middle ring 12 is 2.6mm-3.0mm. In this embodiment, the outer diameter of the solid middle ring 12 is 2.8mm.

[0033] The outer diameter of the outer discontinuous hollow ring 13 is 2.8mm-3.2mm. In this embodiment, the outer diameter of the outer discontinuous hollow ring 13 is 3.0mm.

[0034] In one or more embodiments, the number of arc-shaped grooves 131 is four. In this embodiment, the distance between the two adjacent ends of two adjacent arc-shaped grooves 131 is 0.5 mm. Specifically, the area between the two adjacent ends of two adjacent arc-shaped grooves 131 is directly connected to the outer area of ​​the middle solid ring 12 and the outer discontinuous hollow ring 13.

[0035] In actual operation, the inner hollow ring 11 and the arc groove 131 can be formed by circuit board etching process.

[0036] Using the LCP target structure of this embodiment during the cutting process can improve the cutting accuracy of the equipment, and can basically meet the cutting tolerance control within 75um.

[0037] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An LCP target structure, characterized in that: Includes a copper foil layer and components respectively disposed on the copper foil layer. Inner hollow ring; A solid ring in the middle is concentrically arranged around an inner hollow ring; The outer discontinuous hollow ring includes multiple evenly distributed arc-shaped grooves. The multiple arc-shaped grooves form a ring structure, which is concentrically arranged around the central solid ring. The angle between the line connecting the end of an arc-shaped groove and the center of the inner hollow ring and one side of the copper foil layer is θ, where 40°≤θ≤50°.

2. The LCP target structure according to claim 1, characterized in that: 43°≤θ≤47°.

3. The LCP target structure according to claim 1, characterized in that: θ = 45°.

4. The LCP target structure according to claim 1, characterized in that: The angle between the line connecting the end of an arc-shaped groove and the center of the inner hollow ring and the horizontal direction is θ.

5. The LCP target structure according to claim 1, characterized in that: The inner diameter of the inner hollow ring is 0.6mm-1.0mm, and the outer diameter of the inner hollow ring is 1.4mm-1.8mm.

6. The LCP target structure according to claim 5, characterized in that: The inner diameter of the inner hollow ring is 0.8 mm, and the outer diameter of the inner hollow ring is 1.6 mm.

7. The LCP target structure according to claim 1, characterized in that: The outer diameter of the solid ring in the middle is 2.6mm-3.0mm.

8. The LCP target structure according to claim 7, characterized in that: The outer diameter of the solid ring in the middle is 2.8 mm.

9. The LCP target structure according to claim 1, characterized in that: The outer diameter of the outer discontinuous hollow ring is 2.8mm-3.2mm.

10. The LCP target structure according to claim 9, characterized in that: The outer diameter of the outer discontinuous hollow ring is 3.0 mm.

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