Deep Trench Isolation Structure With Integrated Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current deep trench isolation structures in semiconductor devices hinder heat dissipation due to low thermal conductivity, leading to reduced performance and lifetime as device frequency and density increase.
Innovation Solution
Incorporating a heat dissipation layer with high thermal conductivity, such as metal, within the deep trench isolation structure, along with a dielectric liner layer, to enhance heat dissipation while maintaining isolation functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional deep trench isolation structure is used, then isolation functionality is achieved, but heat dissipation is hindered due to low thermal conductivity
Solution Approach 1:
The deep trench isolation structure employs a composite material system consisting of a dielectric liner layer (first material) and a heat dissipation layer (second material) with different thermal conductivities. The dielectric liner provides electrical isolation while the heat dissipation layer, positioned adjacent to the semiconductor device, provides high thermal conductivity pathways for heat removal, thus simultaneously achieving both isolation and heat dissipation functions.
2Productivity
If device frequency and density are increased, then performance is improved, but temperature increases leading to reduced lifetime
Solution Approach 1:
The heat dissipation layer acts as an intermediary thermal conduction pathway between the semiconductor device and the substrate. This intermediate layer with high thermal conductivity facilitates efficient heat transfer from the high-density, high-frequency device to the substrate, preventing temperature accumulation that would otherwise reduce device lifetime while allowing the device to operate at higher frequencies and densities.
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 heat dissipation in semiconductor devices by reducing thermal obstruction and enabling both isolation and heat dissipation functions, thereby enhancing performance and extending the lifetime of the devices.
Implementation Method 1
The heat dissipation layer is disposed in the substrate... the thermal conductivity of the heat dissipation layer may be greater than the thermal conductivity of silicon dioxide... the thermal conductivity of the heat dissipation layer may be greater than the thermal conductivity of silicon
Data Source
AI summary
A semiconductor structure including a substrate and a deep trench isolation structure is provided. The deep trench isolation structure is disposed in the substrate and is not electrically connected to any device. The deep trench isolation structure includes a heat dissipation layer and a dielectric liner layer. The heat dissipation layer is disposed in the substrate. The dielectric liner layer is disposed between the heat dissipation layer and the substrate.