This section provides an overview for solid capacitors as well as their applications and principles. Also, please take a look at the list of 7 solid capacitor manufacturers and their company rankings. Here are the top-ranked solid capacitor companies as of February, 2024: 1.HONGDA ELECTRONICS CO., LIMITED..
Solid Capacitor is a type of capacitor that uses a solid electrolyte in contact with a dielectric.
Conventional capacitors use liquid (wet) or paste (dry) electrolyte, which is superior in terms of cost. However, the dry-up phenomenon of the electrolyte, performance degradation due to leakage, and vulnerability to temperature changes are issues.
Solid Capacitors, on the other hand, use a solid electrolyte to prevent dry-up phenomenon and leakage, and to improve temperature variation and responsiveness.
Solid Capacitors are used in computers, especially around CPUs, which operate at high temperatures and require reliability and voltage resistance. They are broadly classified into non-polar and polar capacitors, the former using ceramics or plastic films, and the latter using conductive polymers or manganese dioxide.
In recent years, due to the trend toward miniaturization and high integration, attention has been focused on capacitors made of organic polymers, which are compact and have high capacitance, and development is underway.
Solid Capacitors do not use an electrolyte for the cathode, but a solid material. The solid material can accumulate and release electric charge by using a conductive polymer or other highly conductive material.
A capacitor consists of a dielectric sandwiched between metal plates. The dielectric is an insulator. A capacitor consisting of this structure can accumulate an electric charge on the metal plate. Electrolytic capacitors use an electrolytic solution instead of a metal plate on the cathode side and thus have a structure with a liquid inside the capacitor.
The capacitance of a capacitor is proportional to the surface area of the electrodes and inversely proportional to the distance between the electrodes. Some Solid Capacitors are processed to have porous holes in the surface area of the electrodes to increase the capacitance.
Solid Capacitors are composed of electrodes, dielectric and electrolyte, and are stacked according to the capacitance required.
Non-polarity Solid Capacitors use metal electrodes, titanium dioxide or film as the dielectric, and do not require an electrolyte. Since there is no polarity and either positive or negative voltage can be applied, they can be used in AC circuits.
Although plastic film capacitors are particularly expensive, they have excellent heat resistance and are therefore suitable for use in products with high heat resistance, such as cellular phones.
Solid Capacitors with polarity have polarity, which limits the direction of voltage. Metals, graphite, and other materials are used as electrodes, metal oxides are used as dielectrics, and conductive polymers and manganese dioxide are used as electrolytes.
Solid Capacitors with polarity have the disadvantages of lower rated voltage than non-polar capacitors, but they are becoming the mainstream, especially those using conductive polymers, because of their superior heat resistance, low heat generation due to high electrical conductivity of the capacitor itself, and the possibility of designing large capacitance. Solid capacitors are becoming mainstream, especially those using conductive polymers.
There are Solid Capacitors that use aluminum as the metal plate for the anode and an aluminum oxide film as the dielectric used between the electrode plates. The advantage is that an aluminum oxide film can be generated on the surface of the anode by applying a voltage to the electrodes. During the oxide film generation, current flows in the direction of the applied voltage, but the current decreases as the film is generated.
The current flowing at this time is called leakage current. Because of this current, the oxide film is not a perfect insulator. However, it is characterized by the fact that it conducts almost no current below the voltage at which the oxide film is formed and that it does not conduct current up to a certain voltage when applied in the reverse direction.
Although not a perfect insulator, it functions well as a dielectric in a capacitor.
*Including some distributors, etc.
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Vishay Intertechnology, Inc. (Vishay) was incorporated in 1962 and is headquartered in Malvern, Pennsylvania. The company serves the industrial, automotive, telecommunications, consumer products, and medical end markets and sells its products under numerous brand names inlcuding Siliconix, Draloric, Beyschlag, UltraSource, and Applied Thin-Film Products. The company manufactures and sells discrete semiconductors and passive electronic components in globally while operating in six market segments: MOSFETs, diodes, optoelectronic components, resistors, inductors, and capacitors.
Tokin America Inc., headquartered in San Jose, California, is a supplier of passive electronic components in North, South, and Central America and is a subsidiary of Tokin Corporation. Its diverse product range includes capacitors, noise countermeasure components, and sensors used in several industries, including telecommunication, automotive electronics, and digital home appliances. The company also provides specialized design support and works with several distributors within the United States, including Future Electronics, WPG Americas, and Bravo Electronics.
Matsuo Electric Co.,Ltd., founded in 1949 in Japan, is a specialty component manufacturer of tantalum capacitors, film capacitors, and circuit protection components. The company's microelectronics products include small size, long life, chip tantalum capacitors, leaded tantalum capacitors, fuses, and PET and PPS-type film capacitors used by original equipment manufacturers in a wide variety of industries, including the automotive, electronics, space, and healthcare markets for fire alarms, personal computers, power tools, hearing aids, automotive navigation, and many more devices. Matsuo Electric Co.,Ltd.'s products are RoHS compliant.
Murata Manufacturing Co., Ltd. (Murata Manufacturing) was founded in 1944 and is headquartered in Nagaokakyo, Japan. Murata Manufacturing designs, manufactures, and sells ceramic-based passive electronic components and solutions globally. The company operates through components, modules, and others segments, serving communications, mobility, industrial, healthcare, and personal electronics customers. They company's product offerings include noise suppression products, quartz devices,RFID devices, phase shifters, and wireless connectivity platforms. Services such as webinars and video library are also available for existing and potential customers alike.
ZONKAS ELECTRONIC CO., LTD., established in 1982 in Taiwan, is a manufacturer of inductors, capacitors, and electrical components. The company's main products include electrolyte capacitors, multilayer leaded ceramic capacitors, transformers, axial fixed inductors, and gas discharge tubes, used by OEM manufacturers worldwide. ZONKAS ELECTRONIC CO., LTD.'s registered brand is ZONKAS, and the company holds ISO 9001 and IS 14001 certifications. The company has its main factory and secondary office located in China.
*Including some distributors, etc.
*Including some distributors, etc.
|Number of Companies
|United States of America