Process for manufacturing tantalum capacitors

Details Process for manufacturing tantalum capacitors Process for manufacturing tantalum capacitors

H - Electricity

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H01G 4/10 (2006.01) B22F 1/00 (2006.01) H01G 9/042 (2006.01)

Patent

CA 2112903

2112903 9319478 PCTABS00026 A process for manufacturing tantalum capacitors in which microwave energy is used to sinter a tantalum powder compact in order to achieve higher surface area and improved dielectric strength. The process comprises cold pressing tantalum powder (12) with organic binders and lubricants to form a porous compact (14). After removal of the organics, the tantalum compact is heated to 1300 to 2000 ·C by applying microwave radiation. The compact is then anodized to form a dielectric oxide layer (16) and infiltrated with a conductive material (20) such as Mn02. Wire leads (13 and 22) are then attached to form a capacitor (10) and the capacitor is hermetically packaged to form the finished product.

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