Nano Metal Compound Coating for Heat-Dissipation Units
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Solution Overview
Problem
Current heat-dissipation units, such as metal radiating fins, suffer from oxidation which reduces their thermal conductivity and leads to increased thermal resistance, potentially causing chip damage and reduced heat dissipation efficiency in electronic devices.
Innovation Solution
A heat-dissipation unit coated with an oxidation-resistant nano metal compound thin film formed through a reduction process using a reduction gas and a nano compound coating, applied via methods like physical vapor deposition or sol-gel deposition, to prevent oxidation and maintain thermal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal radiating fin is exposed to air, then oxidation occurs forming metal oxide, but thermal conducting efficiency is largely reduced
Solution Approach 1:
The patent applies a nano thin film coating on the metal radiating fin surface to prevent oxidation. This thin film barrier protects the metal from reacting with oxygen in the air, maintaining its thermal conducting efficiency without significant degradation over time.
Solution Approach 2:
The patent creates a composite structure by combining the metal radiating fin with a nano thin film coating. This composite material approach allows the metal to retain its high thermal conductivity while the coating provides oxidation resistance, solving both requirements simultaneously.
2Reliability
If nickel or tin coating is applied to prevent oxidation, then oxidation resistance is improved, but thermal conducting efficiency is much lower than copper
Solution Approach 1:
The patent uses a nano thin film coating instead of thick nickel or tin coatings. This ultra-thin protective layer provides sufficient oxidation resistance while minimizing the impact on thermal conductivity, as the film is thin enough to allow heat transfer but thick enough to prevent oxidation.
Solution Approach 2:
The patent changes the thickness parameter of the protective coating to the nanoscale range. This parameter change allows the coating to provide oxidation protection while maintaining high thermal conductivity, overcoming the limitation of conventional thick metal coatings that significantly reduce heat transfer.
3Reliability
If water solution process is used to coat nickel, then oxidation resistance is improved, but contamination occurs such as adsorption of acid group anions
Solution Approach 1:
The patent replaces the water solution coating process with a physical vapor deposition or chemical vapor deposition process. This substitution eliminates the use of water-based solutions and acid group anions, providing oxidation protection without introducing contamination risks to the semiconductor packaging.
Solution Approach 2:
The patent employs vapor deposition processes that occur in controlled atmospheres, avoiding the use of aqueous solutions that contain harmful anions. This creates a cleaner coating process that protects against oxidation without introducing contamination from acid group anions commonly found in water-based electroplating or chemical plating solutions.
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 nano thin film effectively protects the heat-dissipation unit from oxidation, maintaining high thermal conductivity and preventing chip damage, thus enhancing the heat dissipation performance and extending the lifespan of electronic components.
Implementation Method 1
The nano metal compound thin film is formed via a reaction of a reduction gas with at least a nano compound coating and the metal main body
Implementation Method 2
applied via physical vapor deposition, chemical vapor deposition, or sol-gel processes
Implementation Method 3
applied via physical vapor deposition, chemical vapor deposition, or sol-gel processes
Data Source
AI summary
A heat-dissipation unit coated with oxidation-resistant nano thin film includes a metal main body having a heat-absorbing portion and a heat-dissipating portion, both of which are coated with at least a nano metal compound thin film. To form the nano metal compound thin film on the heat-dissipation unit, first form at least a nano compound coating on an outer surface of the heat-dissipation unit, and then supply a reduction gas into a high-temperature environment to perform a heat treatment and a reduction process on the heat-dissipation unit and the nano compound coating thereof, and finally, a nano metal compound thin film is formed on the surface of the heat-dissipation unit after completion of the heat treatment and the reduction process. With the nano metal compound thin film, the heat-dissipation unit is protected against formation of oxide on its surface and accordingly against occurrence of increased thermal resistance thereof.