Method of producing an anode for a capacitor

Abstract

A method of producing an anode for a capacitor, which includes the steps of molding a continuously deformable material onto a flat anode conductor and simultaneously externally shaping the material, and solidifying the material to form an anode body.

We claim:  
     
         1 . A method of producing an anode for a capacitor, which comprises the steps of: 
 molding a continuously deformable material onto a flat anode conductor by applying the material on both sides of the anode conductor and simultaneously externally shaping the material; and    solidifying the material to form an anode body.    
     
     
         2 . The method according to  claim 1 , wherein the molding step comprises applying a paste of a binder system and a powder to the flat anode conductor, and the solidifying step comprises subsequently drying and sintering the paste.  
     
     
         3 . The method according to  claim 2 , wherein the applying step comprises printing the paste with a stencil.  
     
     
         4 . The method according to  claim 2;  wherein the applying step comprises screen-printing the paste.  
     
     
         5 . The method according to  claim 2 , wherein the applying step comprises applying the paste to the anode conductor through two masks, each assigned to one side of the anode conductor.  
     
     
         6 . The method according to  claim 5 , which further comprises supporting an end of the anode conductor, which projects beyond an edge of a perforation in the mask, with a spacer.  
     
     
         7 . The method according to  claim 2 , wherein the applying step comprises a process selected from the group consisting of injecting the paste, pressing the paste, and casting the paste around the anode conductor.  
     
     
         8 . The method according to  claim 2 , which further comprises forming a green film from the paste, cutting to length, and adhesively bonding to the anode conductor.  
     
     
         9 . The method according to  claim 1 , which further comprises pressing a powder around the anode conductor to form a compact, from which the anode conductor projects on one side, and subsequently sintering the compact.  
     
     
         10 . The method according to  claim 9 , which further comprises pushing the flat anode conductor into a bed of the powder prior to pressing step.  
     
     
         11 . The method according to  claim 9 , which further comprises providing the anode conductor as a strip-like metal sheet with a width/thickness ratio of between 2 and 100.  
     
     
         12 . The method according to  claim 9 , wherein the anode conductor is selected from the group consisting of a tantalum foil and a tantalum sheet.  
     
     
         13 . The method according to  claim 9 , wherein the powder is a tantalum powder.  
     
     
         14 . The method according to  claim 9 , which further comprises adding a lubricant to the powder as an additive with a lubricating action.  
     
     
         15 . The method according to  claim 9 , which further comprises adding a camphor to the powder as an additive with a lubricating action.  
     
     
         16 . The method according to  claim 14 , which further comprises removing the additive prior to sintering.