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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 1300.degree. to 2000.degree. 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:
 [1];  [2];  [1]
  1. Oak Ridge, TN
  2. Knoxville, TN
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
868652
Patent Number(s):
5184286
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; manufacturing; tantalum; capacitors; microwave; energy; sinter; powder; compact; achieve; surface; improved; dielectric; strength; comprises; cold; pressing; organic; binders; lubricants; form; porous; removal; organics; heated; 1300; degree; 2000; applying; radiation; anodized; oxide; layer; infiltrated; conductive; material; mno; wire; leads; attached; capacitor; hermetically; packaged; finished; product; powder compact; cold pressing; organic binders; applying microwave; organic binder; microwave radiation; microwave energy; conductive material; oxide layer; process comprises; wave energy; manufacturing tantalum; porous compact; tantalum capacitors; tantalum powder; dielectric strength; tantalum compact; pressing tantalum; /361/29/419/

Citation Formats

Lauf, Robert J, Holcombe, Cressie E, and Dykes, Norman L. Process for manufacturing tantalum capacitors. United States: N. p., 1993. Web.
Lauf, Robert J, Holcombe, Cressie E, & Dykes, Norman L. Process for manufacturing tantalum capacitors. United States.
Lauf, Robert J, Holcombe, Cressie E, and Dykes, Norman L. Fri . "Process for manufacturing tantalum capacitors". United States. https://www.osti.gov/servlets/purl/868652.
@article{osti_868652,
title = {Process for manufacturing tantalum capacitors},
author = {Lauf, Robert J and Holcombe, Cressie E and Dykes, Norman 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 1300.degree. to 2000.degree. 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 = {1}
}

Patent:

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