Protection Cap Structure for Thermal Interface Package Reliability
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Solution Overview
Problem
Conventional electronic component packages face limitations in thermal insulation and reliability due to damage-prone thermal interface materials (TIMs) and the complexity of establishing efficient heat transfer for advanced electronic circuits.
Innovation Solution
A package design featuring an electrically conductive carrier, an electronic component, an encapsulant, an electrically insulating and thermally conductive interface structure, and a reversibly attachable protection cap that fully circumferentially surrounds the encapsulant and interface structure, providing mechanical protection and efficient heat removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If thermal interface material is used to transfer heat from the package to the cooling unit, then heat transfer efficiency is improved, but the reliability deteriorates due to mechanical damage such as scratching
Solution Approach 1:
The protection cap is applied to the package before the thermal interface material is exposed, preventing mechanical damage to the TIM during handling and assembly operations. This preliminary protective action ensures the TIM remains intact and functional when eventually exposed for thermal coupling.
Solution Approach 2:
The protection cap serves as a protective barrier that cushions the thermal interface material from mechanical stresses, scratches, and damage during manufacturing and assembly processes, ensuring the TIM maintains its integrity before it is needed for heat transfer.
2Reliability
If the protection cap fully circumferentially surrounds the encapsulant and interface structure, then mechanical protection is improved, but device complexity increases
Solution Approach 1:
The protection cap is designed as a simple sleeve or cap structure that circumferentially surrounds the package, providing comprehensive mechanical protection through a straightforward geometric form rather than complex multi-component assemblies.
Solution Approach 2:
The protection cap serves multiple functions simultaneously: it protects the thermal interface material from damage, provides structural support during handling, and maintains the integrity of the encapsulant, thereby reducing the need for additional separate protective components.
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 enhances the thermal and electrical reliability of the package by protecting the sensitive interface structure from mechanical damage and ensuring efficient heat dissipation through the thermally conductive interface, while maintaining ease of handling and manufacturing.
Implementation Method 1
an electrically insulating and thermally conductive interface structure covering an exposed surface portion of the carrier
Implementation Method 2
an electrically insulating and thermally conductive interface structure covering an exposed surface portion of the carrier
Implementation Method 3
a protection cap partially or entirely covering the interface structure
Data Source
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AI summary
A package (100) which comprises an electrically conductive carrier (102), an electronic component (104) on the carrier (102), an encapsulant (106) encapsulating part of the carrier (102) and the electronic component (104), an electrically insulating and thermally conductive interface structure (108) covering an exposed surface portion of the carrier (102), and a protection cap (110) covering at least part of the interface structure (108).