Thermal Power Plane for ICs via Through Laminate Vias
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Solution Overview
Problem
Current 3D microprocessor architectures face limitations in electrical off-stack connectivity and power delivery due to the mixing of power and signaling via C4 solder balls, which restricts performance gains from vertical integration and increases thermal resistance.
Innovation Solution
A dedicated power delivery layer using through laminate vias (TLVs) and micro C4 solder balls separates power delivery from high-speed signaling, allowing for optimized power distribution across the chip stack with minimal thermal resistance and increased interconnectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If power and signaling are mixed via C4 solder balls, then electrical connectivity is achieved, but thermal resistance increases and performance gains from vertical integration are restricted
Solution Approach 1:
The patent segments the electrical interconnection system into separate functional layers: a power delivery layer dedicated to power distribution and an I/O layer dedicated to signal transmission. This segmentation allows each layer to be optimized independently, with the power layer providing low thermal resistance paths through dedicated power vias while the I/O layer handles signaling, thereby resolving the contradiction between thermal management and vertical integration performance.
Solution Approach 2:
The patent extracts the power delivery function from the mixed C4 solder ball interconnection system and creates a dedicated power delivery layer. By taking out the power delivery paths and separating them from the signaling paths, the invention eliminates the thermal bottleneck caused by mixed-signal C4 connections while maintaining full vertical integration capability for both power and signals through their respective optimized paths.
2Power
If C4 pitch is reduced to increase power delivery capacity, then more power can be delivered, but manufacturing complexity and design constraints increase
Solution Approach 1:
The patent transitions from two-dimensional C4 solder ball array optimization to a three-dimensional layered power delivery architecture. By moving power delivery into a dedicated vertical layer with through-lamella vias, the system achieves high power delivery capacity without being constrained by planar pitch reduction, thereby increasing power capacity while maintaining manageable design complexity through standardized layer stacking.
3Power
If dedicated power delivery layer is implemented, then power delivery capacity increases and power noise is reduced, but manufacturing complexity increases
Solution Approach 1:
The dedicated power delivery layer is designed with multi-functionality to offset manufacturing complexity. The same power delivery infrastructure serves multiple purposes: power distribution, thermal management through low thermal resistance paths, and noise reduction through electromagnetic shielding via ground planes. This multi-functionality justifies the additional manufacturing steps by delivering multiple benefits from a single structural addition.
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 solution enhances power delivery capacity, reduces power noise in signal paths, and increases packaging density while maintaining effective thermal dissipation, thereby improving performance and reducing design constraints in 3D VLSI architectures.
Implementation Method 1
each TLV in the plurality of TLVs is coupled to one of the plurality of conductors or the one or more ground planes
Implementation Method 2
the power delivery layer comprises a plurality of conductors, a plurality of insulating materials, one or more ground planes, and a plurality of through laminate vias (TLVs)
Implementation Method 3
one or more ground planes
Implementation Method 4
constitutes a minimal thermal resistance
Data Source
AI summary
A mechanism is provided for a thermal power plane that delivers power and constitutes minimal thermal resistance. The mechanism comprises a processor layer coupled, via a first set of coupling devices, to a signaling and input/output (I/O) layer and a power delivery layer coupled, via a second set of coupling devices, to the processor layer. In the mechanism, the power delivery layer is dedicated to only delivering power and does not provide data communication signals to the elements of the mechanism. In the mechanism, the power delivery layer comprises a plurality of conductors, a plurality of insulating materials, one or more ground planes, and a plurality of through laminate vias. In the mechanism, the signaling and input/output (I/O) layer is dedicated to only transmitting the data communication signals to and receiving the data communications signals from the processor layer and does not provide power to the elements of the processor layer.