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Title: Process for manufacturing tantalum capacitors

Abstract

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 with organic binders and lubricants to form a porous compact. After removal of the organics, the tantalum compact is heated to 1,300 to 2,000 C by applying microwave radiation. Said compact is then anodized to form a dielectric oxide layer and infiltrated with a conductive material such as MnO[sub 2]. Wire leads are then attached to form a capacitor to said capacitor is hermetically packaged to form the finished product.

Inventors:
; ;
Issue Date:
OSTI Identifier:
6261549
Patent Number(s):
5184286
Application Number:
PPN: US 7-853474
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Resource Relation:
Patent File Date: 10 Mar 1992
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; CAPACITORS; MANUFACTURING; BINDERS; COLD WORKING; HEATING; LUBRICANTS; MANGANESE OXIDES; MICROWAVE RADIATION; POWDERS; SINTERING; TANTALUM; CHALCOGENIDES; ELECTRICAL EQUIPMENT; ELECTROMAGNETIC RADIATION; ELEMENTS; EQUIPMENT; FABRICATION; MANGANESE COMPOUNDS; MATERIALS WORKING; METALS; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 240100* - Power Systems- (1990-)

Citation Formats

Lauf, R J, Holcombe, C E, and Dykes, N L. Process for manufacturing tantalum capacitors. United States: N. p., 1993. Web.
Lauf, R J, Holcombe, C E, & Dykes, N L. Process for manufacturing tantalum capacitors. United States.
Lauf, R J, Holcombe, C E, and Dykes, N L. Tue . "Process for manufacturing tantalum capacitors". United States.
@article{osti_6261549,
title = {Process for manufacturing tantalum capacitors},
author = {Lauf, R J and Holcombe, C E and Dykes, N L},
abstractNote = {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 with organic binders and lubricants to form a porous compact. After removal of the organics, the tantalum compact is heated to 1,300 to 2,000 C by applying microwave radiation. Said compact is then anodized to form a dielectric oxide layer and infiltrated with a conductive material such as MnO[sub 2]. Wire leads are then attached to form a capacitor to said capacitor is hermetically packaged to form the finished product.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {2}
}