Interposer PCB Via Current Balancing
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Solution Overview
Problem
In electronic devices with stacked printed circuit boards, imbalanced direct current resistance due to varying wire lengths leads to unbalanced current distribution and power loss, resulting in heat generation and instability in power lines.
Innovation Solution
The electronic device employs an interposer printed circuit board with at least two vias, where a first PCB with a power supply circuit is directly connected to one via and a second PCB with a load circuit is connected to the same via through conductive bridge structures, extending the connection via conductive materials to balance current flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple interposer vias are allocated to handle maximum current, then current carrying capacity is improved, but direct current resistance becomes imbalanced due to varying wire lengths, causing current distribution imbalance and power loss
Solution Approach 1:
The patent applies local quality by making each via connection path have equal length from the power supply circuit to the via and from the via to the load circuit. This ensures that each via experiences the same resistance, creating locally optimized uniform conditions that resolve the current distribution imbalance problem while maintaining high current carrying capacity through multiple vias.
2Power
If multiple interposer vias are allocated to handle maximum current, then current carrying capacity is improved, but heat generation increases due to power loss in imbalanced wires
Solution Approach 1:
By ensuring equal path lengths for all via connections, the patent creates uniform resistance conditions that prevent power loss and reduce heat generation. This local optimization at each via connection point ensures efficient current distribution across all vias, maintaining high power capacity without excessive heat buildup.
3Adaptability or versatility
If wire lengths to vias are unequal, then connection flexibility is improved, but current distribution becomes imbalanced due to resistance differences
Solution Approach 1:
The patent prioritizes current distribution stability by enforcing equal path lengths for all via connections. This creates a controlled, uniform electrical environment that ensures stable and balanced current flow through each via, preventing the instability that would result from unequal resistance values.
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 effectively balances current flow through the vias, reducing power loss and heat generation, thereby enhancing the stability of the power line and improving current distribution.
Implementation Method 1
a first extension connection unit comprising a conductive material configured to connect the second via through a wire extending from the first direct connection unit
Data Source
AI summary
An electronic device including an interposer printed circuit board (PCB) may comprise: an interposer PCB including at least two vias; a first PCB including a first direct connection unit including a power supply circuit and configured to directly connect the power supply circuit to a first via, and a first extension connection unit comprising a conductive material configured to connect a second via through a wire extending from the first direct connection unit; and a second PCB including a second direct connection unit including a load circuit and configured to directly connect the load circuit to the second via, and a second extension connection unit comprising a conductive material configured to connect the first via through a wire extending from the second direct connection unit.