Peripheral Inductors for IC Miniaturization
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Solution Overview
Problem
Conventional inductors in integrated circuits (ICs) occupy significant space due to the need for large inductance, which is challenging to achieve without increasing resistance, limiting the miniaturization of IC devices.
Innovation Solution
Peripheral inductors are designed to extend around the periphery of the die, utilizing previously underutilized regions and acting as a guard ring to mitigate mechanical damage, while also serving as an electromagnetic shield or thermal management structure, thereby reducing the footprint and enabling size reductions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inductors are designed to achieve large inductance, then inductance is improved, but area occupied increases
Solution Approach 1:
The inductor is moved from the interior of the die to the periphery, utilizing the boundary region. The inductor extends around the periphery of the die, effectively using the edge region that was previously underutilized, thereby achieving large inductance without occupying significant interior area.
Solution Approach 2:
The peripheral inductor structure serves multiple functions: it provides the required inductance for power circuitry, acts as a guard ring to mitigate mechanical damage, and can function as an electromagnetic shield or thermal management structure, thereby achieving multiple benefits from a single structural element.
2Volume of stationary object
If inductor volume is reduced by decreasing wire thickness, then volume is improved, but resistance increases
Solution Approach 1:
The inductor utilizes the periphery region of the die, effectively adding a spatial dimension to the design. By routing the inductor around the edge of the die rather than placing it in the interior, the design achieves compact volume while maintaining adequate wire dimensions to control resistance.
3Productivity
If die size is reduced for miniaturization, then productivity is improved, but inductor design becomes more difficult
Solution Approach 1:
The peripheral inductor structure serves multiple functions simultaneously: it provides the required inductance for power circuitry, acts as a guard ring to mitigate mechanical damage, and can function as an electromagnetic shield or thermal management structure, thereby achieving multiple benefits from a single structural element.
Solution Approach 2:
The inductor is positioned at the periphery of the die, utilizing the boundary region. This spatial reconfiguration allows the inductor to coexist with interior circuitry, enabling miniaturization while maintaining functional requirements.
Data Source
AI summary
Disclosed herein are peripheral inductors for integrated circuits (ICs), as well as related methods and devices. In some embodiments, an IC device may include a die having an inductor extending around at least a portion of a periphery of the die.