Ceramic substrate thickness analysis is a testing process that accurately measures the surface and overall thickness of ceramic materials. Using high-precision measuring equipment and standardized testing methods, it enables the evaluation of dimensional stability of ceramic substrates in various applications. Thickness analysis covers not only the average thickness of the ceramic material but also includes indicators such as thickness uniformity, flatness variations, and local thickness changes. This testing provides scientific data support for subsequent process optimization, quality control, and product performance evaluation, and is a crucial step in ensuring that ceramic substrates meet technical requirements in electronic packaging, heat sink manufacturing, and precision device applications.
Testing Items:
1. Average thickness measurement: Measuring the average thickness of the entire ceramic substrate and recording the deviation between the standard value and the actual value.
2. Thickness uniformity assessment: Detecting thickness differences at different locations and calculating the percentage of thickness uniformity.
3. Local thickness variation analysis: Evaluating the difference between local areas and the overall thickness.
4. Flatness testing: Detecting the surface undulation height of the ceramic substrate and evaluating its match with design requirements.
5. Dimensional stability testing: Measuring thickness changes under varying temperature conditions.
6. Cutting edge thickness measurement: Detecting the difference in thickness between the edge and the center.
7. Layered thickness measurement of multi-layer ceramic structures: Measuring the thickness of each layer of multi-layer composite ceramic substrates.
8. Surface protective layer thickness detection: Measuring the thickness of the additional protective layer on the surface of the ceramic substrate.
9. Sintering shrinkage rate measurement: Recording the thickness difference before and after the sintering process and calculating the shrinkage rate.
10. Thermal expansion thickness change measurement: Measuring thickness changes under elevated temperature conditions to evaluate thermal stability.
11. Humidity environment thickness change assessment: Detecting thickness changes under different humidity conditions.
12. Correlation analysis of thickness and mechanical strength: Analyzing strength trends in conjunction with thickness data.
Testing Scope:
1. Alumina ceramic substrates: Used in electronic packaging, printed circuit board carriers, heat sinks, etc.
2. Aluminum nitride ceramic substrates: Widely used in high-power module heat dissipation and semiconductor packaging.
3. Zirconia ceramic substrates: Used in medical devices and precision structural components.
4. Multi-layer ceramic circuit substrates: Suitable for high-density wiring and high-frequency, high-speed circuits.
5. Ceramic Heat Dissipation Substrates: Used for thermal management of electronic devices in high-temperature environments.
6. Thin-Film Ceramic Substrates: Used as carriers for precision sensors and microelectronic components.
7. Power Electronics Ceramic Substrates: Suitable for high-power device packaging, withstanding high voltage insulation.
8. Ceramic Substrates for Military and Aerospace Applications: Used for high-stability components in special environments.
9. High-Frequency Wireless Communication Ceramic Substrates: Used for communication devices in microwave and millimeter-wave frequency bands.
10. Automotive Electronics Ceramic Substrates: Including heat dissipation substrates for powertrain control modules.
11. Laser Carrier Ceramic Substrates: Used for supporting high-precision optical devices.
12. Semiconductor Power Module Ceramic Substrates: Used for module packaging requiring high insulation and thermal conductivity.
Testing Methods/Standards
International Standards:
ISO 1302, ISO 4287, ISO 4288, ISO 3274, ISO 5436, ISO 25178-2, ISO 8512, ISO 4545, ISO 14656, ISO 16145, ISO 14728, ISO 21920
National Standards:
GB/T 1804, GB/T 1031, GB/T 1032, GB/T 4340, GB/T 1423, GB/T 1958, GB/T 6414, GB/T 6416, GB/T 10610, GB/T 2035, GB/T 14864, GB/T 20457
Testing Equipment
1. Laser Thickness Gauge: Uses non-contact laser displacement measurement for high-resolution thickness detection.
2. Contact Displacement Micrometer: Used for precise point thickness measurement, suitable for small-area ceramic samples.
3. Coordinate Measuring Machine: Obtains thickness and flatness data in three-dimensional space.
4. Optical Microscope Measurement System: Used for micro-area thickness measurement and surface morphology observation.
5. Digital Projection Measuring Instrument: Measures thickness using optical magnification and digital readout.
6. High-Temperature Environment Thickness Testing Equipment: Measures thickness changes under simulated high-temperature operating conditions.
7. Constant Temperature and Humidity Chamber: Controls the humidity environment to measure thickness changes of ceramic substrates.
8. Scanning Electron Microscope: Obtains cross-sectional thickness information and microstructural details.
9. Ultrasonic Thickness Gauge: Measures internal thickness using the principle of ultrasonic reflection.
10. Online Thickness Measurement System for Sintering Process: Monitors the thickness of ceramic substrates in real time during the sintering process.
11. Flatness Inspection Table: Evaluates flatness in conjunction with thickness data.
12. Multilayer Structure Analysis Equipment: Analyzes the thickness distribution of multilayer ceramic substrates.