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Failed aluminium electrolytic capacitors with open vents in the top of the can, and visible dried electrolyte residue (reddish-brown color) The capacitor plague was a problem related to a higher-than-expected failure rate of non-solid aluminium electrolytic capacitors between 1999 and 2007, especially those from some Taiwanese manufacturers, [1] [2] due to faulty electrolyte composition that ...
Structurally, capacitors consist of electrodes separated by a dielectric, connecting leads, and housing; deterioration of any of these may cause parameter shifts or failure. Shorted failures and leakage due to increase of parallel parasitic resistance are the most common failure modes of capacitors, followed by open failures.
Samsung Electro-Mechanics (SEM, 삼성전기) is a multinational electronic component company headquartered in Suwon, Gyeonggi Province, South Korea. It is a subsidiary of the Samsung Group . The company produces chip parts such as MLCCs, semiconductor substrates , camera modules, network modules and printed circuit boards.
From 2000 to 2005, a stolen recipe of such a water-based electrolyte missing important stabilizing substances [18] [20] [36] led to the problem of mass-bursting capacitors in computers and power supplies, which became known as the "Capacitor Plague". In these capacitors the water reacts quite aggressively and even violently with aluminum ...
From 1999 through at least 2010, a stolen recipe for such a water-based electrolyte, in which important stabilizers [47] [48] were absent, [49] led to the widespread problem of "bad caps" (failing electrolytic capacitors), leaking or occasionally bursting in computers, power supplies, and other electronic equipment, which became known as the ...
A capacitor (Retrace Timing Capacitor) or series of capacitors (to provide redundancy) is used to slow the collapse of the magnetic field. [ 206 ] [ 207 ] The design of the high voltage power supply in a product using a CRT has an influence in the amount of x-rays emitted by the CRT.
Electrolytic capacitors differ from other capacitor types, whose capacitances are typically measured at 1 kHz or higher. For tantalum capacitors a DC bias voltage of 1.1 to 1.5 V for types with a rated voltage of ≤2.5 V or 2.1 to 2.5 V for types with a rated voltage of >2.5 V may be applied during the measurement to avoid reverse voltage.
In air at sea level pressure of 101 kPa, the critical value is roughly 30 kV/cm, [1] but this decreases with pressure, therefore, corona discharge is more of a problem at high altitudes. [4] Corona discharge usually forms at highly curved regions on electrodes, such as sharp corners, projecting points, edges of metal surfaces, or small diameter ...