EMI Shielding Encapsulant with Conductive Particles
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Solution Overview
Problem
Existing electrical circuits lack effective solutions for electromagnetic interference (EMI) shielding, which is essential to isolate EMI from external sources and other components, and current methods may not adequately protect against mechanical, chemical, and moisture damage.
Innovation Solution
An electromagnetic interference shielded device is created by incorporating a particulate material, such as ferrite or metallic particles, into an encapsulant layer deposited on the electrical circuit, which absorbs and dissipates electromagnetic radiation, providing both EMI shielding and mechanical protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metal plate is mounted on the surface of an electrical circuit for EMI shielding, then electromagnetic interference shielding is provided, but the device lacks mechanical, chemical, and moisture protection
Solution Approach 1:
The patent combines EMI shielding functionality with mechanical protection by integrating conductive particles into an encapsulant material that simultaneously serves as both shielding agent and protective coating, eliminating the need for separate metal plate and protective layer
Solution Approach 2:
The invention uses composite materials consisting of conductive particles dispersed within an encapsulant matrix, creating a material that provides both electromagnetic shielding and mechanical/environmental protection in a single integrated structure
2Reliability
If an encapsulant layer with dispersed particles is used for EMI shielding, then both EMI shielding and mechanical protection are achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The encapsulant material serves multiple functions simultaneously: it provides mechanical protection, chemical resistance, moisture barrier, and EMI shielding through the dispersed conductive particles, reducing the number of separate manufacturing steps
Solution Approach 2:
The conductive particles are pre-dispersed into the encapsulant material before deposition, so that the shielding functionality is built into the encapsulant itself, eliminating the need for subsequent shielding layer application
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 shields electrical circuitry from EMI, minimizes the risk of short circuits, and offers mechanical, chemical, and moisture protection, while tuning electromagnetic properties to suit specific frequency requirements.
Implementation Method 1
incorporating a particulate material, such as ferrite or metallic particles, into an encapsulant layer deposited on the electrical circuit, which absorbs and dissipates electromagnetic radiation
Data Source
AI summary
An electromagnetic interference (EMI) shielded device and a method for making an EMI shield device are disclosed. The EMI shielded device may include an electrical circuit and an encapsulation layer disposed on a portion of the electrical circuit. The encapsulant layer having a plurality of particles dispersed therein, wherein the plurality of particles are suitable for shielding electrical circuitry from EMI. The method for making an EMI shielded device may include providing an electrical circuit, and depositing an encapsulant material upon a portion of the electrical circuit, wherein a plurality of EMI shielding particles are dispersed within the encapsulant material. An additional method may include depositing a dielectric material upon a portion of the electrical circuit and depositing an encapsulant material upon a portion of the dielectric material and the portion of the electrical circuit, wherein a plurality of EMI shielding particles are dispersed within the encapsulant material.