Process for manufacturing tantalum capacitors

Patent · 31 December 1992

OSTI ID:868652

Lauf, Robert J ^[1]; Holcombe, Cressie E ^[2]; Dykes, Norman L ^[1]

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1. Oak Ridge, TN
2. Knoxville, TN

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.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5184286
• OSTI ID: 868652
• Country of Publication: United States
• Language: English

Related Subjects

/361/29/419/
1300
2000
achieve
anodized
applying
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attached
binders
capacitor
capacitors
cold
cold pressing
compact
comprises
conductive
conductive material
degree
dielectric
dielectric strength
energy
finished
form
heated
hermetically
improved
infiltrated
layer
leads
lubricants
manufacturing
manufacturing tantalum
material
microwave
microwave energy
microwave radiation
mno
organic
organic binder
organic binders
organics
oxide
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packaged
porous
porous compact
powder
powder compact
pressing
pressing tantalum
process
process comprises
product
radiation
removal
sinter
strength
surface
tantalum
tantalum capacitors
tantalum compact
tantalum powder
wave energy
wire