Solid electrolytic capacitor and process for fabricating same

Details Solid electrolytic capacitor and process for fabricating same Solid electrolytic capacitor and process for fabricating same

2008-12-09

2010-12-14

Ha, Nguyen T (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

C361S516000, C361S525000, C361S528000, C361S529000, C361S540000

Reexamination Certificate

active

07852614

ABSTRACT:
The invention provides a solid electrolytic capacitor wherein the anode has a dielectric oxide film of a structure less susceptible to damage due to mechanical stresses and which is diminished in leakage current and less prone to short-circuiting, and a process for fabricating the capacitor. The capacitor of the invention comprises an anode of aluminum having a dielectric oxide film formed over a surface thereof from amorphous alumina, and is characterized in that a plurality of tunnel-shaped etching pits are formed in the anode. The process of the invention for fabricating the solid electrolytic capacitor includes the steps of forming a plurality of tunnel-shaped etching pits in an aluminum material, effecting anodic oxidation by immersing the aluminum material in an electrolytic solution containing oxalic acid or the like, and effecting anodic oxidation by immersing the aluminum material in an electrolytic solution containing boric acid or like inorganic acid or a salt thereof or containing adipic acid or like organic acid or a salt thereof and applying a voltage at least three times the rated voltage of the capacitor.

REFERENCES:
patent: 5485346 (1996-01-01), Kanbara et al.
patent: 6058006 (2000-05-01), Yoshioka et al.
patent: 6208503 (2001-03-01), Shimada et al.
patent: 6288890 (2001-09-01), Saito et al.
patent: 6307735 (2001-10-01), Saito et al.
patent: 6321114 (2001-11-01), Nutzman et al.
patent: 6510044 (2003-01-01), Loffelholz et al.
patent: 6589441 (2003-07-01), Feger
patent: 6611422 (2003-08-01), Yamazaki et al.
patent: 6696138 (2004-02-01), Sakai et al.
patent: 6751833 (2004-06-01), Saito et al.
patent: 6970343 (2005-11-01), Hayashi et al.
patent: 6989982 (2006-01-01), Kobayashi et al.
patent: 63-62312 (1988-03-01), None
patent: 05-343266 (1993-12-01), None
patent: 5-343267 (1993-12-01), None
patent: 05343267 (1993-12-01), None
patent: 8-288184 (1996-11-01), None
patent: 11274007 (1999-10-01), None
patent: 2000-21672 (2000-01-01), None
patent: 2003-203826 (2003-07-01), None
patent: 2003-257791 (2003-09-01), None
patent: 2004-266024 (2004-09-01), None
Chinese Office Action dated Jul. 24, 2009 issued in corresponding Chinese patent Application No. 200610004258.4 (w/English Translation).
Notice of Reasons for Refusal dated Feb. 23, 2010 issued in corresponding Japanese patent Application No. 2005-035579 (w/Partial Translation).
Japanese Office Action dated Sep. 14, 2010, issued in corresponding Japanese Patent Application No. 2005-035579.

Affiliated with

Also associated with

Rating

Solid electrolytic capacitor and process for fabricating same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Solid electrolytic capacitor and process for fabricating same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid electrolytic capacitor and process for fabricating same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4191599