PCB Insulation via Parallel Recess Ends and Thermal Detachment
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Solution Overview
Problem
Existing methods for introducing electrical insulations in printed circuit boards face challenges in controlling recesses at their end portions, which can lead to short circuits if not precisely aligned, and require zero tolerance, making them impractical. Additionally, reducing thermal energy input to avoid substrate damage is not sufficient for insulation when deviations occur.
Innovation Solution
The method involves introducing groove-shaped recesses with end portions running parallel to each other without overlap, ensuring a strip-shaped region of the conductive layer is retained, allowing for indirect heat input to achieve reliable detachment and insulation, even with deviations in position, by exploiting reduced heat dissipation in the thermally insulated region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the end portions of recesses are aligned with zero tolerance to ensure electrical insulation, then reliable insulation is achieved, but the manufacturing precision requirement becomes impractically high
Solution Approach 1:
The patent applies beforehand cushioning by intentionally designing an overlap region between adjacent recesses that is larger than the maximum expected positioning deviation. This pre-established margin ensures that even with manufacturing variations, the conductive layer is completely removed in the insulation region, preventing short circuits while accommodating normal manufacturing tolerances.
Solution Approach 2:
The patent applies preliminary anti-action by intentionally creating an overlap between recesses that counteracts potential positioning errors. By designing the recesses to extend beyond the theoretical meeting point, the system pre-compensates for possible deviations, ensuring that the insulation function is maintained even when recesses are not perfectly aligned.
2Object-affected harmful factors
If thermal energy input is reduced to avoid substrate damage, then substrate integrity is maintained, but insufficient heat is available to detach the conductive layer for insulation
Solution Approach 1:
The patent applies local quality by concentrating thermal energy precisely at the interface between the conductive layer and substrate along the machining path. The laser beam is focused to create a localized heating zone that selectively reduces adhesion only where needed for detachment, while the substrate bulk remains unaffected due to its higher thermal mass and distance from the energy source.
Solution Approach 2:
The patent replaces mechanical or chemical etching methods with thermal energy input from a laser beam. This substitution allows for precise control of the heating process, enabling selective detachment of the conductive layer through controlled reduction of adhesion forces, while avoiding the substrate damage associated with more aggressive mechanical or chemical methods.
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 approach ensures reliable electrical insulation without the need for precise alignment or overlap of recesses, reducing the risk of substrate damage and allowing for tolerance in machining, thus simplifying the control program and improving production efficiency.
Implementation Method 1
the groove-shaped recess is introduced selectively in the conductive layer along a machining path by means of thermal energy input from a laser beam
Implementation Method 2
these regions are heated selectively by laser radiation in order to reduce the adhesion
Data Source
AI summary
A method for introducing electrical insulations in a printed circuit board includes selectively introducing groove-shaped recesses between different regions of an electrically conductive layer on a substrate along a machining path using a thermal energy input such that end portions of each of the recesses or different ones of the recesses are joined to one another. The end portions are introduced parallel to one another without overlap such that a strip-shaped region of the conductive layer is initially retained between the end portions so as to insulate the different regions.