Multilayer Interdigitated Power Delivery Structure for Low Impedance
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Solution Overview
Problem
High total impedance in power distribution networks leads to unacceptably high levels of power noise, which can disrupt reliable power delivery in integrated circuits, IC packages, and printed circuit boards.
Innovation Solution
The implementation of a power delivery structure with interdigitated conductors on multiple layers, where conductors on different layers are maintained at different voltages, reduces the inductance and overall impedance of the power distribution network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional power delivery structures are used, then the structure is simple, but the total impedance is high causing unacceptably high power noise
Solution Approach 1:
The patent transitions from planar 2D conductor layouts to 3D interdigitated conductor structures that extend vertically across multiple layers. This dimensional change allows conductors to be positioned closer together in the vertical dimension while maintaining horizontal separation, reducing loop area and inductance without increasing horizontal complexity
Solution Approach 2:
The power delivery structure is segmented into multiple conductors arranged in an interdigitated pattern across different layers. Each conductor segment carries a portion of the current, and the segmented structure allows for optimized current distribution and reduced overall impedance compared to a single monolithic conductor
2Reliability
If conductors are placed closer together to reduce inductance, then impedance decreases, but conductor spacing and manufacturing precision requirements increase
Solution Approach 1:
By utilizing the vertical dimension across multiple layers, the patent achieves reduced conductor spacing without compromising manufacturing precision. Conductors on different layers can be positioned closer effectively while maintaining adequate physical separation through the insulating layer, reducing inductance without increasing lateral manufacturing difficulty
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 effectively decreases the amount of power noise introduced by the power distribution network, ensuring more reliable and efficient power delivery across various electronic components.
Implementation Method 1
The inductance (and therefore the impedance) of power delivery structure 102 may be unacceptably high
Implementation Method 2
If the total impedance of the power distribution network is high, then the power distribution network may introduce an unacceptably high amount of power noise
Data Source
AI summary
A structure for delivering power is described. In some embodiments, the structure can include conductors disposed on two or more layers. Specifically, the structure can include a first set of interdigitated conductors disposed on a first layer and oriented substantially along an expected direction of current flow. At least one conductor in the first set of interdigitated conductors may be maintained at a first voltage, and at least one conductor in the first set of interdigitated conductors may be maintained at a second voltage, wherein the second voltage is different from the first voltage. The structure may further include a conducting structure disposed on a second layer, wherein the second layer is different from the first layer, and wherein at least one conductor in the conducting structure is maintained at the first voltage.