Title:
IMPROVED TANTALUM CAPACITOR AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH03173413
Kind Code:
A
Abstract:
PURPOSE: To obtain a Ta capacitor by inserting a Ta rod into Ta powder, molding the rod applied with powder by applying a differential compressive force, compacting the rod applied with powder and the matching part thereof by applying specified pressures respectively and then sintering, anodizing and forming a cathode. CONSTITUTION: A die 20 is filled with a Ta powder composition and a Ta rod 13 is matched with protrusions 25, 26. Dies 21, 22 are then closed to compress the powder in a main volume part 26' at a density of 4-7g/cc and the powder in the range 27 to be matched with the rod 13 at a density of 8-10g/cc. A green pellet thus obtained is sintered at 1600 deg.C for about 20min under 1×10<-5> Torr in order to remove additive materials and then Ta powder and Ta rod are connected mechanically and electrically to produce a tight sponge- like body. It is then anodized normally and a cathode is formed thereon thus completing a tantalum capacitor.
Inventors:
JIYON AARU SUTAAMAA
JIYON WAI KATSUDOUORADAA
JIYON WAI KATSUDOUORADAA
Application Number:
JP16008390A
Publication Date:
July 26, 1991
Filing Date:
June 20, 1990
Export Citation:
Assignee:
AVX CORP
International Classes:
H01G9/052; B22F3/04; H01G4/08; H01G9/00; (IPC1-7): H01G9/05
Domestic Patent References:
| JPS62102515A | 1987-05-13 | |||
| JPS4939342A | 1974-04-12 | |||
| JPS62277715A | 1987-12-02 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)