Wiring Circuit Board Two-Dimensional Code Recognition
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Solution Overview
Problem
The visibility evaluation portion on metal-clad laminate wiring circuit boards, featuring a two-dimensional dot pattern, often experiences recognition failure due to overlaps between stripe-shaped grooves and dots, leading to interference and poor recognition.
Innovation Solution
The wiring circuit board incorporates stripe grooves and recesses that form a two-dimensional code with a dot pattern, where one side of the code aligns with the grooves, reducing overlap and improving recognition by using a laser mark with specific size and surface treatment to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a two-dimensional dot pattern is formed on the metal layer, then visibility evaluation and management are enabled, but recognition failure occurs due to overlap with stripe grooves
Solution Approach 1:
The patent applies asymmetry by strategically positioning the two-dimensional code so that one side is parallel to the stripe grooves while the other side is perpendicular. This asymmetric orientation minimizes the overlap between code dots and grooves, reducing interference and improving recognition accuracy compared to symmetric or random positioning.
Solution Approach 2:
The patent implements local quality by creating a localized smooth region on the metal layer surface where the two-dimensional code is formed. This smooth region is specifically treated to reduce or eliminate stripe grooves in the code area, while other areas of the metal layer may retain their normal groove structure. This localized treatment ensures high recognition accuracy for the code without affecting other functional areas.
2Measurement precision
If the visibility evaluation portion is made larger to improve readability, then recognition becomes easier, but the area occupied on the circuit board increases
Solution Approach 1:
The patent applies parameter changes by optimizing the size, spacing, and distribution parameters of the dots in the two-dimensional code. By carefully adjusting these parameters, the code achieves high readability and recognition accuracy within a compact area, eliminating the need for larger evaluation portions.
3Productivity
If conventional marking methods are used, then manufacturing is simple, but productivity is low due to time-consuming recognition processes
Solution Approach 1:
The patent replaces conventional mechanical marking methods (such as stamping or printing) with laser marking technology. This substitution enables rapid, precise formation of two-dimensional codes directly on the metal layer, significantly reducing manufacturing time and improving productivity while maintaining simple implementation.
Solution Approach 2:
The patent applies preliminary action by forming the two-dimensional code during the metal layer fabrication process itself, rather than as a separate post-processing step. The code is created on the support metal layer before final assembly, enabling early verification and reducing subsequent recognition and rework time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces recognition failure of the two-dimensional code, enhancing productivity and readability, particularly when the recesses are sized 5 mm or less and formed as laser marks.
Implementation Method 1
the recess is a laser mark
Data Source
AI summary
A wiring circuit board includes a support metal layer; a base insulating layer disposed on at least one surface in the thickness direction of the support metal layer, and a wiring layer disposed on one surface in the thickness direction of the base insulating layer. A plurality of stripe grooves that extends along a predetermined direction orthogonal to the thickness direction and a plurality of recesses that sinks in the thickness direction of the support metal layer are formed on one surface in the thickness direction and/or the other surface in the thickness direction of the support metal layer. The recesses form a two-dimensional code having a generally rectangular shape in plan view by means of a dot pattern. One side of the two-dimensional code is disposed so as to lie along the stripe grooves.