History
People have dealt with and managed the problems of static electricity for hundreds of years.For example, at the beginning of the fifteenth Century, military fortress, static control program implemented in the treatment of black powder to prevent ignition from electrostatic discharge (ESD). In early 1860, Vin Mills in the American use grounding and flame ionization techniques to eliminate static electricity steel tube and paper in the drying process of network. When American Navy sent the first nuclear submarine in the 50’s of the last century in the Arctic, typical of the antistatic agent used to reduce electrostatic influence to navigation equipment. Over the years, as electronic devices become smaller, faster, therefore, more vulnerable to the destructive effect of static electricity. In order to ensure the normal operation of electrical equipment to the electrostatic, Navy needs some form of control. Because the navy task, static control and increasing awareness of the whole world. Then, static control, industrial development, products and equipment control of electrostatic and electrostatic discharge.
Definitions
According to Grolier’s encyclopedia, Static Electricity is electricity at rest or the accumulation of electric charge, as opposed to an electric current which is the movement of electricity. The flow or movement of people and/or materials in and through the environment causes separation and therefore static electricity. A familiar example is when a person walks across a carpeted floor. Static Electricity is generated simply by the contact and separation of the soles of shoes from the carpeted floor. ESD occurs when the electrostatic charge is transferred from a material that carries the charge to an electrostatic sensitive device. In the example above this ESD is the shock felt after walking across the carpeted floor and then touching a door knob. It is this ESD, which comes in varying degrees, that can be most damaging to electrical devices and other industrial, commercial and consumer products.
Examples
Static Electricity, a natural phenomenon, and consequently ESD are the primary causes of multiple number of problems affecting industry, business and personal life. These problems can be as simple as the shock resulting from walking across a carpet; as costly as the destruction of sensitive electronic components or jamming of machinery; and as dangerous as the ignition of combustible vapors, powders or dust. Typical problems caused by static;
Attraction of dust, dirt and bacteria to all environmental surfaces, as well as to products and product packages Damage or destruction of sensitive electronic components and sub-assemblies during manufacture, testing, packaging, shipping or receiving.
Computer and electronic office equipment data errors memory loss, system failures and other glitches.
Charge generation on surfaces of tote boxes and carriers used to process and store electronic components can create a potential for discharge. Jamming or slipping of paper, plastics or other material during printing, packaging or converting. Ignition of combustible vapors, dust or solvents causing fire or explosion. Irregularities caused by static in high quality printing, heat sealing, silk screening, lamination and other applications.
Work benches and production surfaces in electronic manufacturing and repair facilities will triboelectric charge components, assemblies, or their handling containers in contact and separation with a surface thereby creating a discharge
FACTS
1. Almost any material can generate static electricity. The ability to store or dissipate the charge depends on the type of material
2. Static can cause damage to sensitive devices resulting in instant failure. In contrast, static damage can also go undetected for a period of times resulting in product failure once the product is in service.
3. Electrostatic fields are associated with charged objects
4. The degree of severity of ESD events is contingent upon the type of discharge which occurs.
Electrical Characteristics of Materials
In order to understand how to control the generation of static electricity and the prevention of ESD, one must know the different electrical characteristics of materials that can generate static electricity. There are four varying degrees of electrical resistance.
Conductive Silver Powders allows a charge to flow across or through its volume easily. Surface Resistivity < 106 ohms/sq The miracle of the products have been provide solutions for static control in the past 20 years in India.Our high quality products to help prevent the electrostatic discharge damage sensitive electronic components.Our products include electrostatic prevention personnel grounding, anti-static work surface, anti-static packaging.