Thermal Attach Cluster for IC Packaging Heat Dissipation

The patent segments the thermal management function into multiple independent thermal attach clusters distributed across the package substrate. Each cluster contains separate thermal vias, heat sinks, and thermal pads that can independently dissipate heat from different regions of the integrated circuit, preventing heat concentration and improving overall thermal performance while maintaining compact device size.

The patent extends thermal management from a two-dimensional surface problem to a three-dimensional solution by creating vertical thermal pathways through multiple layers. Thermal vias penetrate through the package substrate thickness, connecting heat sources at the IC level to heat dissipation structures at the board level, effectively utilizing the Z-dimension to improve heat transfer without increasing the device footprint.

The patent incorporates thermal management structures into the package substrate during the substrate fabrication process itself, before the integrated circuit is mounted. Thermal vias, heat sinks, and thermal pads are pre-formed as integral features of the substrate layers, eliminating the need for post-assembly thermal modifications and reducing overall manufacturing complexity despite the advanced thermal performance.

The package substrate serves multiple functions simultaneously: it provides mechanical support for the integrated circuit, establishes electrical connections through signal traces, and manages thermal dissipation through integrated thermal attach clusters. This multi-functionality consolidates what would otherwise be separate components into a single unified structure, improving heat dissipation without proportionally increasing manufacturing complexity.