Test methods for electrical properties of semiconductor materials

Date：2023-04-12 14:54:15Views：474

Semiconductor materials play an important role in the fields of electronics and optoelectronics, and the testing of their electrical properties is crucial for the design, manufacturing, and performance evaluation of semiconductor devices. When it comes to the electrical performance testing of semiconductor materials, it is necessary to use a series of professional testing methods and techniques to ensure the accuracy and reliability of the test results. The following is a detailed introduction to the electrical performance testing methods of semiconductor materials.

Resistivity test

Resistivity is one of the important electrical performance indicators of semiconductor materials, which reflects the conductivity of the material. The resistivity testing methods include DC resistance measurement method and AC resistance measurement method.

In the DC resistance measurement method, the testing equipment is usually a high impedance resistance box, and the length and cross-sectional area of the test sample are known. The resistivity can be calculated by measuring the DC resistance value of the sample. In the AC resistance measurement method, the testing equipment is an AC amplifier and a standard resistor, which can calculate the resistivity of the sample by measuring its AC resistance value.

Conductivity test

Conductivity is another important electrical performance indicator of semiconductor materials, which reflects the conductivity of the material. The conductivity testing methods include DC conductivity measurement method and AC conductivity measurement method.

In the DC conductivity measurement method, the testing equipment is usually a standard resistor and a DC power supply, and its conductivity can be calculated by measuring the DC conductivity value of the sample. In the AC conductivity measurement method, the testing equipment is an AC amplifier and a standard resistor, which can calculate the conductivity of the sample by measuring its AC conductivity value.

Thermal conductivity test

Thermal conductivity is one of the important thermal performance indicators of semiconductor materials, which reflects the thermal conductivity of the material. The thermal conductivity testing methods include DC thermal conductivity measurement method and AC thermal conductivity measurement method.

In the DC thermal conductivity measurement method, the testing equipment is usually a standard resistor and a DC power supply, and its thermal conductivity can be calculated by measuring the DC conductivity value of the sample. In the AC thermal conductivity measurement method, the testing equipment is an AC amplifier and a standard resistor, which can calculate the thermal conductivity of the sample by measuring its AC thermal conductivity value.

Optical property testing

The optical properties of semiconductor materials are also an important reflection of their electrical properties, especially their absorption and reflection spectra. The commonly used optical property testing methods include transmission spectroscopy, reflection spectroscopy, and luminescence spectroscopy.

In transmission spectroscopy, the testing equipment is usually a light source and a transmission microscope, which can calculate the absorption spectrum of the sample by measuring its transmission spectrum. In the reflection spectrum testing method, the testing equipment is usually a reflection microscope and a standard reflector, which can calculate the reflection spectrum of the sample by measuring its reflection spectrum. In luminescence spectroscopy, the testing equipment is usually a light source and a detector, which can calculate the luminescence intensity of the sample by measuring its luminescence spectrum.

The above is a detailed introduction to the electrical performance testing methods of semiconductor materials. Different testing methods can be used to measure the different electrical and optical properties of materials, which is of great significance for the design, manufacturing, and performance evaluation of semiconductor devices. At the same time, the electrical performance testing of semiconductor materials is also one of the important methods for studying the characteristics of semiconductor materials. Our company has a team of professional engineers and industry elites, with three standardized laboratories covering an area of over 1800 square meters. We can undertake various testing projects such as electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection, and tape weaving.