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Ultra-small non-solid electrolyte tantalum capacitor and manufacturing method thereof

A tantalum capacitor and non-solid technology, applied in the field of ultra-small non-solid electrolyte tantalum capacitors and their manufacturing, can solve the problems of large volume of non-solid electrolyte tantalum capacitors, inability to meet the miniaturization and light-weight development of electronic technology, and save cores. Block space, improve internal space utilization, high reliability

Active Publication Date: 2013-11-13
ZHUZHOU HONGDA ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The non-solid electrolyte tantalum capacitors involved in the above existing technologies are relatively large in size and cannot meet the needs of the development of miniaturization and light weight of electronic technology. Further research and improvement are necessary.

Method used

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  • Ultra-small non-solid electrolyte tantalum capacitor and manufacturing method thereof
  • Ultra-small non-solid electrolyte tantalum capacitor and manufacturing method thereof

Examples

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Embodiment 1

[0034] A method for preparing an ultra-small non-solid electrolytic tantalum capacitor: including powder mixing, molding, sintering, spotting, energizing, and assembling. Concrete preparation steps are as follows:

[0035] 1. Powder mixing: In the tantalum powder with a specific volume of 50000 μF V / g, the weight percentage of the tantalum powder and stearic acid or camphor is: 5 parts of stearic acid or camphor are added to every 100 parts of tantalum powder; Dissolve acid or camphor with methylene chloride organic solvent, then add the mixed tantalum powder into the powder mixer and mix evenly, take out the mixed tantalum powder and put it in an oven at 125°C for 40 minutes, take it out and cool it naturally for later use;

[0036] 2. Molding: Weigh 21mg of the mixed tantalum powder according to the design, put it into a special molding mold, and press it on the molding machine to form an anode pellet with a diameter of 1.5mm and a height of 2mm;

[0037] 3. Sintering: Put ...

Embodiment 2

[0043] A method for preparing an ultra-small non-solid electrolytic tantalum capacitor: including powder mixing, molding, sintering, spotting, energizing, and assembling. Concrete preparation steps are as follows:

[0044] 1. In the weight specific volume of 70000μF·V / tantalum powder, the percentage by weight of the tantalum powder and stearic acid or camphor is: add 7 parts of stearic acid or camphor to every 100 parts of tantalum powder; Dissolve the dichloromethane organic solvent, then add the mixed tantalum powder into the powder mixer and mix evenly, take out the mixed tantalum powder and put it in an oven at 85°C for 50 minutes, take it out and cool it naturally for later use;

[0045] 2. Weigh 56mg of mixed tantalum powder according to the design, put it into a special molding mold, and press it on the molding machine to form an anode pellet with a diameter of 2mm and a height of 3mm;

[0046] 3. Put the formed anode pellets into a sintering furnace for sintering at a...

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Abstract

The invention discloses an ultra-small non-solid electrolyte tantalum capacitor and a manufacturing method thereof. The ultra-small non-solid electrolyte tantalum capacitor comprises a tantalum anode, an epoxy resin, a negative pole lead, a silver casing, an anode nickel wire, a piece of non-woven cloth and a fluororubber column provided with a micropore, wherein the tantalum anode is wrapped with the non-woven cloth; an anode tantalum wire penetrates through the micropore of the fluororubber column and is connected with the anode nickel wire at a positive end port in a point welding manner; and the non-woven cloth, the tantalum anode and the fluororubber column all mounted in the silver casing. The manufacturing method comprises steps as follows: firstly, tantalum powder with a high specific volume and stearic acid or camphor are uniformly mixed and then pressed into a micro cylindrical anode pellet, and the cylindrical anode pellet is sintered and subjected to wire dotting, energizing and assembling; a primary anode blank forms an amorphous tantalum pentoxide film through electrochemical oxidation, and the amorphous tantalum pentoxide film serves as a dielectric film of the capacitor and becomes an anode of the capacitor; a cathode adopts an electrolyte solution added with a certain electrolyte; and the casing adopts an ultra-small casing subjected to corrosion or chemical treatment.

Description

[0001] technical field [0002] The invention relates to an electronic component and a manufacturing method thereof, in particular to an ultra-small non-solid electrolytic tantalum capacitor and a manufacturing method thereof. Background technique [0003] Tantalum capacitors are electrolytic capacitors processed with pure tantalum powder as the anode material. The advantages of tantalum capacitors are that they have stable electrical properties, and they are the products that are small in size and can achieve large capacitance among all capacitors. Tantalum capacitors come in a wide variety of shapes and are readily manufactured as small and chip components suitable for surface mounting. Adapted to the needs of the current electronic technology automation and miniaturization development. The current production of tantalum electrolytic capacitors mainly includes sintered non-solid, foil-shaped winding solid, and sintered solid, among which sintered solid accounts for more t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/08H01G9/10H01G9/008H01G9/042
Inventor 邹卫王俊其
Owner ZHUZHOU HONGDA ELECTRONICS