Adjustable Heat Spreader Insert for Thin TIM Thermal Interfaces
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Solution Overview
Problem
Existing heat sinks have unavoidable physical gaps with integrated circuits due to manufacturing tolerances, leading to suboptimal thermal efficiency, which can be improved by minimizing the thermal interface material layer thickness through adjustable positioning of a heat spreader.
Innovation Solution
A heat sink system with an adjustable heat spreader insert that allows for precise positioning relative to the circuit board, enabling a thin layer of thermal interface material and separation from the heat sink for easy access and adjustment, utilizing threaded or push-fit mechanisms for adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heat sink is rigidly mounted to minimize the thermal interface material layer thickness, then thermal efficiency is improved, but accessibility for adjustment and maintenance deteriorates
Solution Approach 1:
The heat sink system is divided into separate components: a rigid mounting structure that remains fixed to the circuit board, and an adjustable heat spreader insert that can be independently positioned and removed. This segmentation allows the mounting structure to maintain thermal contact while the insert remains accessible for adjustment and maintenance.
Solution Approach 2:
The heat spreader insert is designed with adjustable positioning capabilities through threaded holes and slots, allowing it to be dynamically repositioned relative to the rigid mounting structure. This dynamic adjustment enables optimization of thermal contact while maintaining accessibility for future adjustments and maintenance.
2Reliability
If the thermal interface material layer is made thinner to improve thermal efficiency, then heat transfer is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The adjustable heat spreader insert with threaded adjustment mechanisms allows for dynamic control of the gap between the heat sink and electronic component. This enables precise control of the thermal interface material layer thickness after assembly, compensating for manufacturing tolerances and achieving optimal thermal contact without requiring extremely tight manufacturing precision.
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
Achieves enhanced thermal efficiency by minimizing the thermal interface material layer thickness and allowing for easy maintenance and inspection of electronic components, while maintaining effective heat transfer.
Implementation Method 1
The heat sink and its medium transfers the thermal energy to areas with lower thermal energy, there the heat will be exchanged out of system
Implementation Method 2
a thermal interface material (TIM)... The thermal efficiency of a heat sink system is strongly dependent on this thermal interface
Data Source
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AI summary
An adjustable heat spreader comprises a mounting body (13) for mounting to a circuit board (11) having at least one electronic component (12) to be cooled. The mounting body includes an opening into which is fitted a heat spreading insert (16). In use, a contact surface of the insert is able to be brought into contact against the component (12). The mounting body also has a contact surface (21) provided for interfacing with a mechanically separate heat sink (20). A layer of thermal interface material may be applied between the insert and the component (layer 23), the insert and the heat sink (layer 24) and the mounting body and the heat sink (layer 25).