Component Carrier Cavity With Laser Protection for Deep Laser Structuring
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Solution Overview
Problem
Existing component carriers face challenges in forming accurately defined cavities while maintaining mechanical robustness and electrical reliability, especially under harsh conditions, due to the increasing miniaturization and complexity of components with closely spaced contacts.
Innovation Solution
A component carrier is designed with a stack comprising electrically conductive and insulating layers, featuring a cavity delimited by a bottom wall and sidewall, and an electrically conductive laser protection structure at the edge region to prevent excessive laser damage during cavity formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a cavity is formed deep in the stack using laser processing, then the cavity depth increases to accommodate components, but the laser beam may cause damage to the stack structure
Solution Approach 1:
A laser protection structure is formed on the stack before laser processing. This protective layer is applied in advance to prevent damage during subsequent laser cavity formation, allowing deep cavities to be created without compromising stack integrity.
Solution Approach 2:
The laser protection structure acts as an intermediary between the laser beam and the stack. It absorbs or reflects excessive laser energy, preventing direct damage to the stack while allowing the laser to effectively form deep cavities.
2Manufacturing precision
If the cavity is formed with precise dimensions, then the component accommodation accuracy improves, but the manufacturing process becomes more complex
Solution Approach 1:
The laser protection structure is formed beforehand with specific properties that facilitate precise laser processing. This preliminary preparation enables accurate cavity formation by controlling laser energy absorption and reflection, reducing the need for complex post-processing or iterative adjustments.
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
The laser protection structure allows for the formation of deep, accurately defined cavities without damaging the stack, ensuring mechanical and electrical integrity, and supports high-tech applications like optical packages.
Implementation Method 1
an electrically conductive laser protection structure at least in an edge region between the bottom wall and the sidewall
Data Source
AI summary
A component carrier with a stack including at least one electrically conductive layer structure and at least one electrically insulating layer structure, a cavity formed in the stack and delimited by a bottom wall and a sidewall, and an electrically conductive laser protection structure at least in an edge region between the bottom wall and the sidewall.