SMD Component Electromagnetic Screen and Insulating Layer
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Solution Overview
Problem
In densely packed electronic devices like hearing instruments, electromagnetic coupling between different circuits is a challenge due to the coexistence of analogue, digital, and wireless technologies, where surface mount components are exposed to unintended signal pickup, especially in high impedance environments.
Innovation Solution
An electronic component assembly comprising a surface mount component with an electromagnetic screen and an electrically insulating layer to limit electromagnetic coupling, allowing for independent shielding of critical components while maintaining component density and avoiding post-shielding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a general electromagnetic screen is used to protect all components, then electromagnetic interference is reduced, but the device volume increases and component density decreases
Solution Approach 1:
The patent divides the electromagnetic shielding into individual component level rather than device level. Each sensitive SMD component receives its own localized screen, allowing selective protection without enclosing the entire device. This segmentation enables reduced overall device volume while maintaining necessary EMI protection for critical components.
Solution Approach 2:
The patent applies electromagnetic screens locally to specific sensitive components rather than uniformly across the entire device. This local quality approach allows EMI protection to be concentrated where needed (high impedance circuits, sensitive analog components) while leaving other areas unprotected, thereby reducing total device volume and maintaining high component density.
2Productivity
If surface mount components are used to increase component density, then automation and miniaturization are improved, but electromagnetic coupling between components increases
Solution Approach 1:
The patent introduces individual electromagnetic screens around specific SMD components, segmenting the electromagnetic environment. This allows high component density to be maintained while creating isolated electromagnetic zones around sensitive components, thereby reducing unwanted coupling between closely spaced components.
Solution Approach 2:
The electromagnetic screen acts as an intermediary barrier between SMD components. It mediates the electromagnetic interaction by blocking or redirecting fields, allowing components to be placed closer together without increasing harmful coupling, thus maintaining high productivity and component density.
3Object-affected harmful factors
If electromagnetic screens are added to individual components, then EMI protection is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent merges the electromagnetic screen with the SMD component housing or package as an integrated unit. This combining approach simplifies the overall assembly process, as the screen becomes part of the component itself rather than a separate addition, reducing device complexity while maintaining EMI protection.
Solution Approach 2:
The SMD component housing serves multiple functions: mechanical protection of the component and electromagnetic shielding. This multi-functionality reduces the need for separate screen structures, simplifying the overall device design and assembly while providing necessary EMI protection.
4Ease of manufacture
If naked terminals on SMD components are used for simple connections, then ease of manufacture is improved, but unintended signal pickup increases
Solution Approach 1:
The patent applies electromagnetic screening locally around the terminals and body of SMD components without changing the terminal structure itself. This maintains the simplicity of SMD mounting while adding targeted EMI protection around sensitive areas, reducing unintended signal pickup without compromising ease of manufacture.
Solution Approach 2:
The electromagnetic screen acts as an intermediary protective layer around the component body and terminals. It mediates between the simple naked terminals (which maintain ease of manufacture) and the external electromagnetic environment, blocking unwanted signal pickup while leaving the terminal connection simplicity intact.
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
This solution effectively reduces electromagnetic interference, enabling closer placement of sensitive components to sources of radiation without compromising functionality, allowing for increased component density and flexible arrangement in mixed analogue-digital environments.
Implementation Method 1
an electromagnetic screen for limiting the electromagnetic coupling to and from the surface mount component(s)
Implementation Method 2
an electrically insulating layer located between at least one surface of the surface mount component(s) and the electromagnetic screen
Data Source
AI summary
The disclosure relates to an electronic component assembly including at least one SMD component (11) having a number of external surfaces (111) limited by edges (112) and at least two electrical terminals (113), an electromagnetic screen (12) for limiting the electromagnetic coupling to and from the SMD component or components, and an electrically insulating layer (13) located between at least one of the surfaces and the electromagnetic screen. The disclosure furthermore relates to a method of manufacturing an electronic component assembly and to the use of an electronic component assembly.