IC Heat Sink Grooves for Thermal Interface Overflow Control
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Solution Overview
Problem
Existing IC heat sink assemblies face issues with insufficient or excessive thermally conductive interface material, leading to poor thermal contact and overflow, respectively, which can disable the IC component.
Innovation Solution
Incorporating grooves on the contact surface between the IC component and the heat sink to accommodate excessive thermally conductive interface material, ensuring sufficient thermal contact while preventing overflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermally conductive interface material is increased to ensure sufficient thermal contact, then thermal contact quality is improved, but the interface material overflows to component pins causing functional disablement
Solution Approach 1:
The contact surface of the heat sink is segmented into a central contact region and peripheral groove regions. The grooves are positioned at the periphery to contain excess interface material, while the central region maintains direct thermal contact with the IC component. This segmentation allows the system to accommodate variable amounts of interface material without overflow to pins.
Solution Approach 2:
The grooves act as intermediary containment structures between the interface material application area and the component pins. By providing this intermediate zone, excess interface material is captured in the grooves before it can reach and disable the pins, thus mediating the harmful overflow effect.
2Object-affected harmful factors
If thermally conductive interface material is reduced to prevent overflow, then overflow risk is decreased, but thermal contact quality deteriorates
Solution Approach 1:
The contact surface is divided into functional zones: a central high-contact zone for thermal transfer and peripheral groove zones for material containment. This segmentation allows the system to use sufficient interface material for good thermal contact while the grooves prevent excess material from causing overflow, thus resolving the trade-off between material amount and thermal contact quality.
3Object-affected harmful factors
If grooves are added to the heat sink contact surface to contain excess interface material, then overflow prevention is improved, but device complexity increases
Solution Approach 1:
The heat sink contact surface incorporates groove features that create a porous-like structure for containing interface material. These grooves are integrated directly into the heat sink body during manufacturing, adding minimal structural complexity while effectively preventing overflow. The grooves function similarly to porous containment structures by providing reservoirs for excess material.
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
Maintains effective thermal contact and prevents overflow of the interface material, enhancing heat dissipation performance without impairing component functionality.
Implementation Method 1
a thermally conductive interface material is provided between the attached surfaces to maximize the heat dissipation effect
Data Source
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AI summary
A heat sink for an IC component and an IC heat sink assembly are provided. The heat sink for an IC component has a contact surface suitable for thermally contacting with the IC component. A groove is provided in the contact surface. The IC heat sink assembly includes: a heat sink for an IC component; an IC component thermally connected to the heat sink; and a thermally conductive interface material provided between the heat sink and the IC component.