Power HEXFET transistors encapsulated in TO-220-style and SOT223-style plastic packages were subjected to preconditioning per the JEDEC JESD22-A113 standard, which includes solder reflow simulation and flux application, and to environmental stress testing: highly accelerated biased temperature and humidity test (HAST) and multiple temperature cycling. Electrical measurements and C-SAM mode acou...

The article deals with issues related to quality management and assessment in production of plastic articles injection moulding. Expert knowledge collected textbooks literature allows get acquainted the characteristics product defects arising such processes. technology plastics processing are discussed, most frequent occurring made by molding listed. On basis expert literature, a series actions...

Toothbrush handles made from synthetic polymers like polypropylene and polyethylene accumulate in the environment at an annual rate of 1 billion devices per year without significant degradation, resulting severe burdens particularly marine environments. Herein, we report a new process to generate these plastic using natural, biopolymer-based components direct thermoplastic molding approach, tha...

Facial cleft is the second most common congenital deformity. Problems of cleft can be related to esthetic, phonetics, functional insufficiency, emotional, psychological and social. Significant abnormality in nasal cartilage morphology and asymmetry of alar base and columella are associated with cleft lip and alveolar deformity. Pre Nasoalveolar molding (PNAM) is a nonsurgical method of reshapin...

The global manufacturing development faces the new challenges including waste of resources, short delivery time, labor cost increase, short of labor, etc.. As a result, the overall industry environment of plastic materials manufacturing turns to focus on automatic production that enables manufacturing industry entering into the next phase so that production efficiency, man-made errors, and labo...

A three-step molding softlithographic process has been developed for the construction of a sharp Y-junction structure formation in a 1 × 2 Y-branch plastic optical fiber (POF) coupler design. The 1×2 Y-branch POF coupler is based on a Y-junction splitter which requires that the splitting part is constructed with sharp infinitesimal junction. The softlithographic process enables a PDMS mold to b...

This research work introduces the Early Triassic, Late Triassic-Early Jurassic, and Early Cretaceous silica-rich sand levels at east and central Alborz, Kopeh-Dagh, and Central Iran, and compares them with the Permian silica-rich sand level in the Chirouk mine at east Iran. Ghoznavi and Gheshlaq loose sand in Alborz (Early Triassic-Early Jurassic), Soh quartzite in Central Iran (Early Triassic...

In order to be competitive in the semiconductor manufacturing industry, quality improvement and yield enhancement have received increasing attention. The research focuses on the molding process of Integrated Circuit (IC) assembly. The defects often occurred in molding process include hole, vein, crack, and floss. In order to raise the yield of molding process, the study applies the Taguchi meth...