IC Intermetal Dielectric Openings for Better Heat Dissipation
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Solution Overview
Problem
Integrated circuits (ICs) with semiconductor-on-insulator (SOI) substrates face poor thermal dissipation performance due to the suppression of thermal energy dissipation by intermetal dielectric (IMD) structures and passivation layers, leading to reduced performance and potential device destruction from thermal runaway.
Innovation Solution
Incorporating openings in the IMD structure overlying semiconductor devices to efficiently dissipate thermal energy, reducing the material coverage and enhancing heat dissipation from the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intermetal dielectric (IMD) structures and passivation layers are used to protect semiconductor devices, then device reliability is improved, but thermal dissipation performance deteriorates
Solution Approach 1:
The patent segments the IMD structure by introducing openings (via holes) through it, creating discrete regions that allow thermal energy to escape while maintaining protective coverage in other areas. This segmentation resolves the contradiction by breaking the continuous thermal barrier into localized segments that permit heat dissipation.
Solution Approach 2:
The patent applies local quality by creating openings specifically in regions where thermal dissipation is most needed (overlying semiconductor devices) while maintaining the intact IMD structure in areas where electrical isolation and protection are prioritized. This localized modification optimizes thermal performance without compromising overall device reliability.
2Temperature
If openings are incorporated in the IMD structure to improve thermal dissipation, then thermal dissipation performance is improved, but device complexity increases
Solution Approach 1:
The patent merges the thermal management function with the existing IMD structure by integrating openings into the standard fabrication process flow. Rather than adding a separate thermal management layer, the openings are incorporated directly into the IMD, combining structural support, electrical isolation, and thermal dissipation functions into a single integrated component.
Solution Approach 2:
The openings act as intermediary structures that facilitate thermal energy transfer from the semiconductor devices to the surrounding environment. These openings serve as thermal pathways that mediate between the heat-generating devices and the heat-dissipating external environment, enabling efficient thermal management without requiring complex active cooling systems.
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
The solution improves thermal dissipation performance of ICs by allowing more efficient heat removal from semiconductor devices, thereby increasing their endurance and reducing the risk of thermal-related damage.
Implementation Method 1
the opening overlies at least a portion of the semiconductor device such that thermal energy generated by the semiconductor device dissipates more efficiently
Data Source
AI summary
Various embodiments of the present disclosure are directed towards an integrated chip (IC). The IC includes a substrate. A semiconductor device is disposed on the substrate. An interlayer dielectric (ILD) structure is disposed over the substrate and the semiconductor device. A first intermetal dielectric (IMD) structure is disposed over the substrate and the ILD structure. An opening is disposed in the first IMD structure. The opening overlies at least a portion of the semiconductor device.