Overview
IEC 62047-17:2015 is an international standard published by the International Electrotechnical Commission (IEC) specifically addressing semiconductor devices and micro-electromechanical systems (MEMS). This standard outlines the bulge test method for measuring the mechanical properties of thin film materials, including metals, ceramics, and polymers commonly used in MEMS, micromachines, and related micro/nano-structural applications.
The bulge test involves subjecting a free-standing thin film to uniform pressure within a defined window area, causing it to bulge. Typical film thicknesses range from 0.1 µm to 10 µm, while the membrane window size varies between 0.5 mm and 4 mm, in rectangular, square, or circular shapes. Tests are generally conducted at ambient temperature to ascertain key mechanical properties such as elastic modulus and residual stress.
Key Topics
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Principle of Bulge Test
The standard defines the fundamental approach of applying uniformly distributed pressure to a thin film specimen fixed over a window, causing it to bulge. The deformation response is used to derive mechanical properties.
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Specimen Specifications
Detailed requirements for specimen preparation include dimensions and shapes of the membrane window, with emphasis on thin films used in semiconductor and MEMS devices.
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Test Apparatus and Environment
Guidance on selecting and configuring the necessary test equipment, including pressure devices, bulge chambers, and measurement instruments such as laser interferometers or capacitive sensors.
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Test Procedure and Data Analysis
Step-by-step instructions for conducting the bulge test, capturing deformation data, and analyzing the results to calculate elastic modulus and residual stress through stress-strain or load-deflection methods.
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Measurement Techniques
Annexes within the standard provide information on advanced deformation measurement methods, including laser interferometry and capacitance-based sensors for precise height measurement of the bulging film.
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Specimen Fabrication
Examples and guidelines for fabricating test specimens using MEMS processing techniques to ensure repeatability and accuracy in testing.
Applications
The IEC 62047-17 bulge test method is invaluable for industries and laboratories focused on:
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MEMS Device Manufacturing
Evaluating mechanical properties of thin membrane films ensures reliability and performance of micro-actuators, sensors, and microfluidic components.
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Micromachines and Microfabrication
Characterizing mechanical stress in functional films helps optimize micromachine designs, reduce failure rates, and enhance material selection.
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Thin Film Material Research
Researchers working with metallic, ceramic, or polymer films can use this standardized bulge test to obtain consistent mechanical property data critical for new material development.
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Quality Control and Reliability Testing
Manufacturers use the bulge test as a non-destructive method to monitor residual stresses and mechanical robustness of film layers during production.
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Semiconductor Industry
This method supports ensuring the mechanical integrity of thin films integrated into semiconductor devices, contributing to device longevity and performance.
Related Standards
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IEC 62047-2:2006
This part of the IEC 62047 series focuses on tensile testing methods for thin film materials, complementing the bulge test by providing alternative approaches to measuring mechanical properties of micro/nano films.
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ISO/IEC Directives, Part 2
Governs the structure and drafting of IEC standards, ensuring that IEC 62047-17 aligns with international standardization practices.
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Other Parts of IEC 62047 Series
Address various testing methodologies and aspects of semiconductor thin films and MEMS devices, providing a comprehensive framework for material characterization.
Summary
IEC 62047-17:2015 establishes a standardized bulge test method critical for accurately measuring mechanical properties such as elastic modulus and residual stress in thin films used within semiconductor and MEMS technologies. Its comprehensive approach-from specimen preparation to data analysis and measurement techniques-supports consistency, repeatability, and international harmonization in thin film mechanical testing. Adopting this standard aids manufacturers, researchers, and quality control professionals in achieving reliable and precise characterization of micro/nano-scale films, enabling improved device performance and innovation.
Keywords: IEC 62047-17, bulge test method, thin film mechanical properties, MEMS testing standard, elastic modulus measurement, residual stress testing, semiconductor thin films, micro-electromechanical systems, thin film characterization, microfabrication testing.
Open preview (PDF)Semiconductor devices - Micro-electromechanical devices - Part 17: Bulge test method for measuring mechanical properties of thin films
