Nondestructive testing method and system based on terahertz time-domain spectrum

Abstract

The invention discloses a nondestructive testing method and detection system based on terahertz time-domain spectrum, and the detection system comprises a terahertz reflection module which is used for providing a terahertz light beam; a transmission module, used for bearing and moving a to-be-tested product; a time-domain spectroscopy system, used for detecting the electric field intensity of the terahertz pulse signal reflected by the product to be detected; and a data processing module, used for processing information detected by the time-domain spectroscopy system and judging whether the to-be-detected product is qualified or not. According to the invention, nondestructive testing can be rapidly, efficiently and accurately carried out on the flexible printed electronic product, the quality of the flexible printed electronic product is improved, and the system is suitable for on-line quality control.

Description

technical field [0001] The invention belongs to the technical field of terahertz detection, and in particular relates to a nondestructive detection method and detection system based on terahertz time-domain spectrum, which can be applied to the detection of flexible printed electronic products. Background technique [0002] Printed electronics is a rapidly developing technology in the electronics manufacturing industry, in which active materials are deposited on flexible substrates in the form of printing inks by contact or non-contact printing techniques, this technology enables large-area flexible Lightweight, robust electronics can be produced at low cost on substrates. With the development of conductive inks, the offset printing of conductive organic polymer-based electronic devices has the advantages of multilayer, good printing quality, fast processing speed, and large production volume. The main challenges in this technology include uneven ink distribution due to flu...

AI Technical Summary

Problems solved by technology

[0003] The existing detection methods for flexible printed electronic products include traditional probe-based electrical detection, such as eddy current probes, which are time-consuming and cannot be adjusted in real time during the printing process

Other imaging techniques such as atomic force microscopy, scanning electron microscopy, and optical microscopy are not suitable for in-line quality control due to the small and time-consuming inspection area and are expensive due to the high requirements of sample preparation

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