MEMS Thermal Emitter Layout for Uniform Heating Control
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Solution Overview
Problem
Existing MEMS-based thermal emitters face challenges in achieving efficient thermal radiation emission with compact design, flexible electrical modulation, and reliable temperature control, particularly in applications requiring precise gas analysis and detection.
Innovation Solution
A MEMS-based thermal emitter design with resistive elements on a thin dielectric membrane, featuring contact sections on opposite sides of the structure, allows for improved thermal distribution, compact size, and efficient power connection, along with a method to dynamically adjust voltage distribution across elements for optimal power output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If contact sections are arranged on the same side of the structure, then electrical connection is simplified, but thermal distribution is uneven and device size increases
Solution Approach 1:
The patent transitions from planar contact arrangement to three-dimensional vertical stacking by placing first contact sections on a first side and second contact sections on a second side of the resistive structure. This vertical dimensionality enables balanced thermal distribution while maintaining compact footprint and simplified electrical connections.
2Device complexity
If single resistive element is used, then device structure is simplified, but power output flexibility is limited
Solution Approach 1:
The patent divides the resistive heating function into separate first and second resistive elements, each with independent contact sections. This segmentation enables independent control of each element, providing flexible power output adjustment while maintaining relatively simple individual element structures.
Solution Approach 2:
The patent enables dynamic control of power output by selectively activating one or both resistive elements through independent electrical connections. The control circuit can dynamically adjust which element(s) are active based on required power levels, providing adaptability without increasing structural complexity.
3Volume of moving object
If compact design is implemented, then device size is reduced, but thermal management becomes challenging
Solution Approach 1:
The patent employs asymmetric placement of contact sections on opposite sides of the resistive structure, creating optimized thermal pathways that exploit the three-dimensional space. This asymmetric arrangement facilitates efficient heat dissipation from the compact emitter structure.
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 design enhances thermal radiation emission efficiency, enabling precise gas analysis and detection with reduced thermal cycling and improved reliability, supporting applications in gas sensing technologies.
Implementation Method 1
The appropriate design is based on a resistive heating element deposited onto a thin dielectric membrane which is suspended on a micromachined silicon structure
Implementation Method 2
MEMS-based thermal emitters typically consist of microscale structures that can be heated to high temperatures, causing them to emit infrared radiation
Data Source
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AI summary
A device (12) for emission of thermal radiation, the device (12) comprising a substrate (24), a membrane (26), wherein the substrate (24) provides a frame for the membrane (26), a resistive structure (28) on the membrane (26), the structure arranged at least substantially within a plane (XY) and comprising a resistive first element (34) with electrical first contact sections (36) and a resistive second element (38) with electrical second contact sections (40), and an emitter (32) of the thermal radiation arranged over the structure (28), wherein at least one of the first contact sections (36) is arranged on a first side (42) of the structure (28) and at least one of the second contact sections (40) is arranged on a second side (44) of the structure (28) and wherein the first side (42) is different from the second side (44). Also, a system (10) for optical gas analysis and a method (90) of operating a device (12) for emission of thermal radiation are disclosed.