Semiconductor Package Heat Distribution for Stacked Die Reliability

The patent transitions from planar packaging to three-dimensional stacked packaging, where semiconductor dies are arranged in multiple layers vertically. This dimensional change allows better thermal management by exposing more die surfaces to heat dissipation structures while maintaining compact package footprint. The stacked configuration enables heat to be dissipated from multiple surfaces rather than being trapped in a deeply embedded planar arrangement.

The patent divides the package into distinct functional layers including first and second semiconductor dies, first and second heat dissipation structures, and intermediate structures. This segmentation allows each component to be optimized independently for its specific function - electrical performance, thermal dissipation, or mechanical support - while working together as an integrated system.

The patent employs vertical stacking of semiconductor dies in multiple layers, utilizing the third dimension to increase packaging density. This approach accommodates more dies within a smaller footprint by arranging them vertically rather than spreading them out horizontally, thereby reducing overall package size while maintaining high die count.

The patent implements a nested structure where smaller components are positioned within or between larger structural elements. The heat dissipation structures are integrated within and between the die layers, with intermediate structures nested between adjacent dies. This nesting approach maximizes space utilization and reduces package volume.

The patent divides the thermal management system into multiple discrete heat dissipation structures positioned at different locations and levels within the package. Each heat dissipation structure independently manages thermal loads from adjacent dies, preventing thermal accumulation through distributed thermal pathways rather than a single centralized approach.

The patent introduces vertical thermal management pathways through stacked heat dissipation structures positioned between and around die layers. This three-dimensional thermal conduction network provides multiple escape routes for heat flow, efficiently conducting thermal energy away from die junctions in both horizontal and vertical directions to prevent thermal buildup.