RF Shielding Can With Integral Spring Fingers for Thermal Management
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Solution Overview
Problem
RF cans used for shielding in electronic devices increase thermal resistance and component temperatures due to the additional interface with heat sinks, which is problematic for high power and temperature-sensitive components.
Innovation Solution
An RF shielding can with deformable fingers and a compatible shielded heatsink encasement that ensures metal-to-metal contact, eliminating the need for additional gasketing and maintaining thermal efficiency by using a spring metal alloy like nickel silver, which is designed to interface with a heatsink encasement to provide both EMI sealing and thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If RF cans are used for shielding, then electromagnetic interference sealing is improved, but thermal resistance increases and component temperatures rise
Solution Approach 1:
The RF can incorporates spring fingers made of flexible material that can elastically deform to create metal-to-metal contact with the heatsink encasement, eliminating the need for additional gasketing layers while maintaining EMI sealing effectiveness
Solution Approach 2:
The invention removes the intermediate gasketing layer between the RF can and heatsink encasement, allowing direct metal-to-metal contact through the deformable spring fingers, thereby eliminating the thermal barrier that previously increased thermal resistance
2Object-affected harmful factors
If RF cans are used for shielding, then electromagnetic interference sealing is improved, but thermal resistance increases
Solution Approach 1:
The spring fingers provide flexible contact that ensures continuous metal-to-metal thermal and electrical contact with the heatsink encasement, creating an efficient thermal pathway while maintaining EMI shielding
Solution Approach 2:
The invention merges the EMI sealing function and thermal conduction function into a single integrated structure where the spring fingers simultaneously provide both electromagnetic shielding and thermal management pathways
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 effectively reduces thermal resistance and maintains the benefits of RF cans by ensuring efficient heat dissipation while providing electromagnetic interference sealing, thus preventing components from overheating.
Implementation Method 1
The can is fabricated from spring metal, such as nickel silver... the encasement includes a stepped channel formed into an underside, in which a lip of the channel engages a top surface of the fingers to deform the fingers downward
Data Source
AI summary
The proposed design concerns RF shielding can that has the benefits of an RF can, but without compromising the thermal design of the system.