3D Semiconductor Package Layout for Memory Wall Bottlenecks
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Solution Overview
Problem
The memory wall issue in modern electronic systems, caused by the physical separation between processors and memory, leads to performance bottlenecks due to the speed mismatch between processors and memory chips, particularly in AI applications, where limited memory capacity, clock speed, and interconnect bandwidth hinder efficient data transfer and processing.
Innovation Solution
The development of low-cost 3D IC packaging solutions that stack dies vertically, eliminating the need for expensive through-silicon vias and silicon interposers, allowing for closer proximity of memory and processor dies, thereby reducing data transfer distances and energy consumption while increasing interconnect bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If 2.5D IC packaging with silicon interposer and TSVs is used, then data transfer speed and bandwidth are improved, but manufacturing cost increases significantly
Solution Approach 1:
The patent extracts and eliminates the expensive silicon interposer and TSV components from the packaging system. Instead of using traditional 2.5D IC packaging with interposers, the invention directly stacks memory dies on the processor die using simplified interconnect structures, removing the unnecessary intermediate layer that increases cost while maintaining data transfer performance.
Solution Approach 2:
The patent replaces expensive, complex TSV-based interconnect structures with simpler, more cost-effective wiring approaches that achieve the same functional goal of connecting memory to processor. The design uses standard semiconductor manufacturing processes rather than specialized expensive processes.
2Quantity of substance
If HBM with 3D stacking and multiple dies is used, then memory capacity and bandwidth are increased, but device complexity and cost increase
Solution Approach 1:
The patent merges the memory functionality directly into the processor package by stacking memory dies on the processor die, eliminating the need for separate HBM modules and complex interposer structures. This integration achieves high memory capacity while simplifying the overall device architecture.
Solution Approach 2:
The patent transitions from 2D lateral expansion of memory interfaces to 3D vertical stacking of memory dies on the processor. This dimensional change enables increased memory capacity and bandwidth without requiring wider interconnects or larger package footprints, thereby reducing complexity.
3Ease of manufacture
If processor and memory are physically separated, then manufacturing ease is improved, but data transfer efficiency deteriorates due to distance
Solution Approach 1:
The patent combines the processor and memory into a single integrated package structure, with memory dies stacked directly on the processor die. This merging eliminates the physical separation between compute and memory, enabling high-speed data transfer while maintaining ease of manufacture through standard packaging processes.
Data Source
AI summary
A semiconductor device package is provided. The semiconductor device package comprises a first electronic component, a second electronic component above the first electronic component and an interconnection structure disposed external to both the first electronic component and the second electronic component and configured to electrically connect the first electronic component to the second electronic component, a package material configured to hold the first electronic component and the second electronic component together and an external connector configured to electrically connect the first and second electronic components to an external device. The first electronic component has a portion free from being covered by the second electronic component. The external connector is positioned directly above the portion of the first electronic component.