ESD là gì và dụng cụ dùng nào phù hợp cho công việc liên quan đến ESD ?
ESD is the transfer of electrical charge between two bodies at different potentials, eithei through direct cobtact or though an induces electrical field. And electrostatic discharge costs the electronics industry millions of dollars each year in damaged components, non-functional circuits board and scrambled or missing information.
|An electrostatic-sensitive device (often abbreviated ESD) is any component (primarily electrical) which can be damaged by common static charges which build up on people, tools, and other non-conductors or semiconductors|
ESD can occur in the manufacturing, shipping, transporting, receiving and field handling of intergrated circuits or computer boards with no visible signs of damage. A malfunctions in these components or boards can occur immediately or the apparatus may perform for weeks, months or even years before an unpredictable and premature breakdown causes a field failure.
|ESD is the acronym for Electro-Static Discharge. Discharges of static electricity is a physical phenomena that we can experience every day e.g.combing hairs, zaps after touching a doorknob, lightning ...
Mostly, electrostatic discharges are not harmful for humans, but the effect that they have on electrical components, is the same as the effect of a lightning bolt striking a tree.
Static electricity is generated by friction and seperation of materials, which is called triboelectric generation. Electrons are transferred from one material to the other, leaving both materials charged. Since electrons have a negative charge, the material which acquires electrons is left negatively charged while the one which surrenders electrons becomes positively charged. The triboelectric series is often used in explaining static electricity. The triboelectric chart below shows a sample of the materials that create positive and negative charges.
|We can hear static at between 2,000 and 3,000 volts, feel static above 3,000 volts, and see static at 5,000 volts. With relative humidity at 10% to 20%, a person walking across a carpet can generate 35,000 volts, across a vinyl floor 12,000 volts, and a worker at a bench 6,000 volts. As technology demands more, integrated circuits can be damaged by as little as 5 volts|
Wiha là nhà Sản xuất cung cấp dòng sản phẩm ESD đầy đủ và sâu rộng nhất.
|Wiha là Nhà sản xuất có thể cung cấp dòng sản phẩm đẩy đủ cho các dụng cụ cầm tay ESD với điện trở dẫn: 106-109 ohms|
Xem tiếp phần tiếp theo với chi tiết các dòng sản phẩm ESD của Wiha.