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US 12,683,091 B2Granted
Capacitor and method of forming a capacitor
AssigneeTDK Electronics Co., Ltd.
InventorLászló Dobai
Life of this patent
Estimating the term…
Abstract
A capacitor includes a capacitive element arranged in a housing, wherein in or on the housing a gas dissipation element is arranged and/or wherein the capacitor has an electrolyte that comprises an organic acid having a pka of 4.1 or higher and/or wherein the capacitor has an OMS of 20% or higher.
Claims15
A capacitor comprising:
- a capacitive element arranged in a housing, wherein
- the capacitive element has an anode that comprises a sintered valve metal,
- a fraction of volume occupied by the anode with respect to a total volume inside the housing is 20% or higher,
- at least a portion of the capacitive element is soaked with or immersed in an electrolyte, said electrolyte comprises an at least dicarboxylic acid having a pKai of 4.1 or higher, and the concentration of the at least dicarboxylic acid is 0.1 wt % or higher,
- in the housing a gas dissipation element is arranged that is configured for reducing a gas pressure inside the capacitor,
- wherein a contact surface of the housing comprises a surface structuring that is configured to improve a bonding between a portion of the gas dissipation element that is in contact with the contact surface and said contact surface, and
- wherein the gas dissipation element is chemisorbed onto the housing, and
- a portion of silicon in the gas dissipation element or in an active portion of the gas dissipation element is 5 wt % or higher.
5 more elements
A capacitor comprising:
- a capacitive element arranged in a housing, wherein
- in or on the housing a gas dissipation element configured for reducing a gas pressure inside the capacitor is arranged,
- wherein a portion of silicon in the gas dissipation element or in an active portion of the gas dissipation element is 5 wt % or higher,
- wherein the gas dissipation element is arranged in or on the housing in such a manner that a contact surface of the housing comprises a surface structuring that is configured to improve a bonding between a portion of the gas dissipation element that is in contact with the contact surface and said contact surface, and
- wherein the gas dissipation element is chemisorbed onto the housing.
2 more elements
A method for producing a capacitor, comprising:
- providing a housing having a through hole or first opening, wherein the housing comprises a casing and a cover,
- arranging in or on the through hole or first opening a gas dissipation element that is configured to reduce a gas pressure inside the capacitor, wherein the gas dissipation element is chemisorbed onto a contact surface of the housing, and wherein the contact surface of the housing comprises a surface structuring that is configured to improve a bonding between the housing and the gas dissipation element, and
- arranging a capacitive element having and anode that comprises a sintered valve metal in the casing, and
- impregnating with or soaking the capacitive element in an electrolyte,
- enclosing the capacitive element in the housing by placing the cover on a cover-opening in the casing.
2 more elements
Dependencies are inferred from the claim text.