Discovery process In 1845, Michael Faraday first discovered the magneto-optical effect. He discovered that when an external magnetic field is applied to a glass sample, the polarization plane of the...

Disc capacity The disc capacity refers to the maximum data storage capacity of the disc that can be used by the mo magneto-optical disk drive. Different mo magneto-optical disc drives have different...

ODM Optical Disk Memory is a recording medium formed by coating a thin layer on a substrate for recording. The difference is that the round sheet of the substrate is made of organic glass with low the...

Appearance The MD disc is indeed very small, the size we usually see is 7cm x 6.75cm x 0.5cm, but this time it is the outer protective shell, the real MD inside The diameter of the disc is only 6.4cm...

Composition classification ①Pure iron and low carbon steel Carbon content is less than 0.04%, including electromagnetic pure iron, electrolytic iron and carbonyl iron. It is characterized by high sa...

Brief History The production and application of soft magnetic alloys has a history of more than 100 years. In 1890, the production of thermomagnetic pure iron (or low carbon steel) was used to manuf...

In 1917, GWElmen discovered that (30～90) Ni-Fe alloy has good soft magnetic properties under low and medium magnetic fields, and the initial permeability of 78Ni-Fe ( μ0) is the highest and is called...

Introduction Sendust alloy refers to the high permeability soft magnetic alloy with sendust as the main component element, also known as sendust alloy. A brief history In 1931, Japan’s increase in...

Introduction to terms Magnetic materials with low coercivity, also known as high permeability materials. In the power industry, it is used to manufacture iron cores for electrical equipment such as...

Brief introduction Machinery Industry Press This book is designed for "Printed Circuit Board Design and Production" and "Electronics Specially compiled textbooks for professional courses such as "Cir...

Introduction This book is a training material designated by the Printed Circuit Technology Department of the Production Technology Credit Branch of the Chinese Institute of Electronics. The book cons...

Text Take the printed circuit board as the mounting substrate, install electronic and electromechanical components, devices or other printed circuit board components on it, and use the printed circu...

Introduction "Printed Circuit Board Plating" carries out the technical requirements and specifications of mechanical processing, etching process, screen printing, hot air leveling related to printed...

Development process Since the printed circuit board is not a general terminal product, the definition of the name is a bit confusing. For example, the motherboard for personal computers is called th...

Introduction The application program interface is: "The code used by the ‘Operating system’ or ‘library’ for application calls." Its main purpose is to allow application developers to call a set of...