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In electronics, electrical breakdown or dielectric breakdown is a process that occurs when an electrically insulating material (a dielectric), subjected to a high enough voltage, suddenly becomes a conductor and current flows through it.
At high electric fields, a material that is normally an electrical insulator may begin to conduct electricity – i.e. it ceases to act as a dielectric. This phenomenon is known as dielectric breakdown. The mechanism behind dielectric breakdown can best be understood using band theory.
The threshold value of the electric field intensity at which this occurs is known as the dielectric strength, and the sudden change in behavior observed in the presence of an electric field greater than this threshold value is known as dielectric breakdown.
Electrical breakdown is an important phenomenon in discharge physics. Here we derive the breakdown voltage as a function of the product pL, where p is the working gas pressure, and L is the distance between the electrodes, which is commonly referred to as the Paschen curve.
30 de abr. de 2019 · Here, the fundamentals of the dielectric breakdown phenomenon in traditional and future thin dielectrics are revised. The physical phenomena that trigger the onset, structural damage, breakdown statistics, device reliability, technological implications, and perspectives are described.
6 de dic. de 2010 · Dielectric breakdown is the formation of conducting paths through an insulating material in the presence of an extremely strong electric field. High-voltage transformers contain oil as their insulating dielectric.
20 de ago. de 2008 · Dielectric breakdown is the process of local materials transiting from insulating to conductive when the dielectric is submerged in a high external electric field environment. We show that the atomistic changes of the chemical bonding in a nanoscale breakdown path are extensive and irreversible.
