Anisotropic Graphite Composite Interface for Heat Transfer and Bond Strength
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Solution Overview
Problem
Anisotropic graphite composites face challenges with poor heat transmission performance due to thick titanium-containing metal layers and low bond strength between layers, leading to long-term reliability issues.
Innovation Solution
The development of an anisotropic graphite composite with a titanium-containing metal layer and an inorganic material layer, where the anisotropic graphite, titanium-containing metal layer, and inorganic material layer are stacked and joined with specific surface roughness and thickness, enhancing heat transmission and long-term reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick titanium-containing metal layer is used, then bond strength between layers is improved, but heat transmission performance deteriorates
Solution Approach 1:
The invention optimizes the thickness parameter of the titanium-containing metal layer to a specific range (5μm to 50μm) to balance bond strength and thermal conductivity. This parameter optimization resolves the contradiction by finding the optimal value that satisfies both mechanical bonding requirements and thermal transmission requirements.
2Reliability
If a thin titanium-containing metal layer is used, then heat transmission performance is improved, but bond strength between layers deteriorates
Solution Approach 1:
The invention establishes a minimum thickness threshold (5μm) for the titanium-containing metal layer to ensure sufficient bond strength while maintaining good heat transmission performance. This parameter specification resolves the contradiction by defining the optimal range that prevents both layers from separating during repeated use.
3Strength
If surface roughness is increased, then bond strength between layers is improved, but manufacturing precision deteriorates
Solution Approach 1:
The invention specifies an optimal surface roughness range (Ra 0.3μm to 3μm) for the titanium-containing metal layer. This parameter control resolves the contradiction by defining the precise roughness range that provides sufficient bonding area for strong adhesion while remaining achievable through standard manufacturing processes.
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 achieves excellent heat transmission performance and long-term reliability by optimizing the interface roughness and thickness of the layers, ensuring effective bonding and heat transfer.
Implementation Method 1
Anisotropic graphite in particular has high thermal conductivity. Anisotropic graphite reduces or prevents the occurrence of hot spots in electronic equipment or an electronic part which acts as a heat source.
Implementation Method 2
a (b) titanium-containing metal layer... the (a) anisotropic graphite, the (b) titanium-containing metal layer, and the (c) inorganic material layer being stacked in this order in the Z axis direction and joined to each other
Data Source
AI summary
Anisotropic graphite and an anisotropic graphite composite are provided, each having excellent heat transmission performance and excellent long-term reliability as a heat transmitting element, and a production method for the anisotropic graphite composite. A face of anisotropic graphite which face is perpendicular to crystal orientation planes of graphite layers of the anisotropic graphite may be subjected to surface treatment so as to obtain anisotropic graphite having a specific surface roughness. An anisotropic graphite composite may include anisotropic graphite having an interface that has a specific interface roughness; a titanium-containing metal layer; and an inorganic material layer.