Built-in Textile Screen for MEMS Microphone Heat Resistance
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Solution Overview
Problem
Existing MEMS microphone manufacturing processes lack effective protection against small particles and water intrusion during intermediate assembling steps, and conventional protective screens are damaged by heat generated during soldering operations, leading to increased costs and complexity in assembly and logistics.
Innovation Solution
A built-in textile material screen, made from high-temperature resistant polymers like PEEK, PPS, or PTFE, is integrated into the MEMS microphone body during the packaging phase, providing protection against particles and water while withstanding the heat of soldering operations, eliminating the need for additional components and ensuring protection throughout the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional protective screen is applied near the MEMS opening, then protection against particles and water is improved, but the screen is damaged by heat generated during soldering operations
Solution Approach 1:
The patent changes the material parameter of the protective screen by using high-temperature resistant materials (PTFE, PPS, PEEK) with melting temperatures above 300°C, allowing the screen to withstand soldering heat without damage while maintaining particle and water protection functionality
Solution Approach 2:
The protective screen is merged with the MEMS microphone body structure, being built-in during the packaging phase rather than applied as a separate component. This integration ensures the screen is present during all intermediate assembling steps and soldering operations, providing continuous protection
2Reliability
If a die-cut protective screen is applied as a separate component, then protection is provided, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The protective screen is integrated into the MEMS microphone body structure during the packaging phase, eliminating the need for separate application steps. This merging reduces assembly complexity and manufacturing cost while ensuring continuous protection throughout the production process
Solution Approach 2:
The protective screen is built-in during the packaging phase, before intermediate assembling steps and soldering operations occur. This preliminary action ensures protection is in place from the beginning, eliminating the need for later application steps
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 built-in textile screen effectively prevents particle and water intrusion, enhances acoustical efficiency, and simplifies the assembly process by integrating protection directly into the MEMS device, reducing costs and logistical complexities.
Implementation Method 1
A built-in textile material screen, made from high-temperature resistant polymers like PEEK, PPS, or PTFE, is integrated into the MEMS microphone body during the packaging phase, providing protection against particles and water while withstanding the heat of soldering operations
Data Source
Figure 1~2
AI summary
A MEMS microphone with a built-in textile material protecting screen comprises a microphone body having an opening thereat is arranged a textile material protecting screen which is built-in in the microphone body, during the production phase of the MEMS device called "packaging".