Introduction:In semiconductor manufacturing, fully automated wafer defect inspection during the early stages is critically important. In the backend process, multiple wafers are often bonded together or attached to opaque materials. Since semiconductor materials are opaque to visible light, it is difficult to characterize or inspect the bonding quality or contamination on bonding surfaces using visible…
Introduction Since the early 1990s, there has been a worldwide surge of interest in the development of high-brightness light-emitting diodes (LEDs), which has significantly advanced the field of solid-state lighting. High-brightness LEDs commonly adopt double heterostructures, necessitating excellent lattice matching between materials. This requirement imposes stringent limitations on the choice of semiconductor systems suitable for…
Introduction: Surface-enhanced Raman spectroscopy (SERS) refers to the phenomenon where enhanced electromagnetic fields on sample surfaces significantly enhance the Raman scattering signals compared to ordinary Raman scattering (NRS) signals when certain molecules are adsorbed onto rough metal surfaces. It has been proven to be a quick and efficient spectroscopic method. SERS has high detection sensitivity…
Raman Spectroscopy for the Analysis and Testing of Thermal Paper Su Xiang¹, Zhang Hong¹, Chen Yutai¹, Zhang Liyuan², Fan Ye³ (¹ People’s Public Security University of China, Beijing 100038, China;² Beijing Zhuoli Hanguang Instrument Co., Ltd., Beijing 101102, China;³ Baiyun District Bureau, Guangzhou Public Security Bureau, Guangzhou 510000, China) Abstract Thermal paper is a type…
Introduction Handkerchief tissues are widely used in daily life, and fragments of their packaging are frequently found at crime scenes. Identifying the type and origin of these tissues can provide valuable clues about the user’s identity and movements, thereby contributing significantly to criminal investigations. However, the remnants of packaging materials left at crime scenes are…
Research on the Examination of Cigarette Pack Outer Wrapping Films Using Raman SpectroscopyLu Yifan¹, Jiang Hong¹, Ma Teng¹, Su Hang¹, Zhang Liwen²(1. People’s Public Security University of China, Beijing 100038, China2. Beijing Zhuoli Hanguang Instruments Co., Ltd., Beijing 101102, China)Excerpted from Shanghai Plastics, Issue 04, 2017 1. Introduction With the continuous increase in the smoking population,…
By John Oncea, Editor Deep learning is transforming computational spectroscopy, delivering unprecedented speed, precision, and automation in material and molecular analysis, as recent academic breakthroughs reveal. The past year has witnessed a remarkable evolution in computational spectroscopy, as deep learning frameworks have rapidly outpaced traditional analytical methods. No longer just an experimental buzzword, the integration of…
