Advanced terahertz techniques for quality control and counterfeit detection

  title={Advanced terahertz techniques for quality control and counterfeit detection},
  author={Kiarash Ahi and Mehdi Anwar},
  booktitle={SPIE Commercial + Scientific Sensing and Imaging},
This paper reports our invented methods for detection of counterfeit electronic. These versatile techniques are also handy in quality control applications. Terahertz pulsed laser systems are capable of giving the material characteristics and thus make it possible to distinguish between the materials used in authentic components and their counterfeit clones. Components with material defects can also be distinguished in section in this manner. In this work different refractive indices and… 
Double-Sided Terahertz Imaging of Multilayered Glass Fiber-Reinforced Polymer
Polymer matrix composites (PMC) play important roles in modern industry. Increasing the number of such structures in aerospace, construction, and automotive applications enforces continuous
Review of THz-based semiconductor assurance
Abstract. Terahertz radiation for inspection and fault detection has been of interest for the semiconductor industry since the first generation and detection of THz signals. Until recent hardware
How Do Detected Objects Affect the Noise Distribution of Terahertz Security Images?
An efficient and flexible model for THz images and a useful guidance for the design of THz image denoising algorithms and the development of imaging hardware are provided.
High effective time-dependent THz spectroscopy method for the detection and identification of substances with inhomogeneous surface
We discuss an effective time-dependent THz spectroscopy method for the detection and identification of a substance with an inhomogeneous surface using a broadband THz signal reflected from the
Method for defect contour extraction in terahertz non-destructive testing conducted with a raster-scan THz imaging system.
In this paper, a neoteric algorithm based on a two-dimensional continuous wavelet transform is developed to get the defect contour in the terahertz (THz) non-destructive testing result obtained from
Volatile Liquid Detection by Terahertz Technologies
The prospect of being able to move through security without the inconvenience of separating liquids from bags is an exciting one for passengers, and there are important operational benefits for
Production of good quality holograms by the THz pulsed vortex beams
In this paper, we discuss the quality of holograms based on the calculation of the modulation depth. It’s shown that the terahertz (THz) pulsed vortex beams play a vital role in holography filed,
Detection and identification of substances using noisy THz signal
An effective method for the detection and identification of substances using a high noisy THz signal based on time-dependent integral correlation criteria calculated using spectral dynamics of medium response and an application of the cascade mechanism of molecules high energy levels excitation for the substance identification are discussed.


Terahertz characterization of electronic components and comparison of terahertz imaging with x-ray imaging techniques
THz radiation is capable of penetrating most of nonmetallic materials and allows THz spectroscopy to be used to image the interior structures and constituent materials of wide variety of objects
Self-calibrating technique for terahertz time-domain material parameter extraction.
This manuscript introduces a self-calibrating technique for terahertz (THz) time-domain material characterization in transmission mode that ameliorates the problem caused by differences between sample and reference signals due to power and time drifts inherent in a THz system.
Developing terahertz imaging equation and enhancement of the resolution of terahertz images using deconvolution
This paper introduces a novel reconstruction approach for enhancing the resolution of the terahertz (THz) images. For this purpose the THz imaging equation is derived. According to our best knowledge
Fabrication of Robust Nano-Signatures for Identification of Authentic Electronic Components and Counterfeit Avoidance
In this paper, a novel approach for marking integrated circuit packages with authentication nanosignatures is introduced. In this work, the signatures patterns are fabricated using electron beam
Counterfeit IC detection using light emission
Experimental results presented in this paper show that emission can be effectively used to detect degradation, thus making this technique a very effective way to detect counterfeit ICs.
Recent advances in terahertz imaging
The latest results in tomographic imaging, in which waveforms reflected from an object can be used to form a three-dimensional representation, are described and substantial improvements in the spatial resolution are demonstrated.
Terahertz Imaging for Nondestructive Evaluation of Packaged Power Electronic Devices
Terahertz (THz) time-domain imaging of power electronic devices is performed using the commercial TPSTM Spectra 3000 THz imaging and spectroscopy system. The dimensions of bond wires within power
Modeling of terahertz images based on x-ray images: a novel approach for verification of terahertz images and identification of objects with fine details beyond terahertz resolution
In this work, terahertz images have been simulated from X-ray images. For this aim the terahertz raster scanning process is modeled by a two dimensional convolution of the modelled THz beam and the
Screening for counterfeit electronic parts
Counterfeit electronic parts have become a significant cause of worry in the electronic parts supply chain. Counterfeit parts detected in the electronics industry can be new or surplus parts that are
Growth dependent optical properties of ZnMgO at THz frequencies
A relatively high Mg mole fraction of 7% is achieved using the cavitation effect under sonication to overcome the low solubility of ZnO-MgO at low temperature. The Mg mole fraction is confirmed by