# US 2010/0163541 A1 · Process for manufacturing lead terminal for capacitor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0163541 A1 - Document ID: US20100163541A1 - Status: Published application - Kind: A1 - Application number: 12/450,254 - Filed: 2007-12-25 - Published: 2010-07-01 - Earliest claimed: 2007-03-30 - Inventors: Tatsuo Kubouchi; Makoto Ohta - Web page: https://patentgrep.com/patent/US20100163541A1 ## CPC - H01G 13/006: {Apparatus or processes for applying terminals} - H01G 4/228: Terminals - H01G 9/008: Terminals - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) ## Abstract A process for manufacturing a leadfree lead terminal for capacitor, in which whisker generation can be avoided. There is provided a process for manufacturing a lead terminal for capacitor, comprising bringing metal wire (1) furnished with metal plating layer (2) composed mainly of tin into abuttal on aluminum wire (5) and carrying out arc welding between the metal wire (1) and the aluminum wire (5), wherein portion (9) devoid of the metal plating layer is formed at one end of the metal wire (1), the one end of the metal wire (1) is brought into abuttal on one end of the aluminum wire (5) and thereafter arc welding is carried out therebetween. ## Claims ### Claim 1 A process for manufacturing a lead terminal for a capacitor, comprising the steps of: putting into contact a metal wire comprising a metal plating layer formed mainly of tin with an aluminum wire, and arc welding said metal wire and said aluminum wire to each other, wherein a portion having no metal plating layer formed mainly of tin is provided at one end of said metal wire, and said end of the metal wire and an end of said aluminum wire are put in contact with each other, and said arc welding is carried out at said ends. ### Claim 2 A process for manufacturing a lead terminal for a capacitor, comprising the steps of: putting into contact a metal wire comprising a metal plating layer formed mainly of tin with an aluminum wire, and arc welding said metal wire and said aluminum wire to each other, wherein said metal wire comprises a gap portion formed between an end portion of the metal wire and a main portion of the metal wire, said gap portion having no metal plating layer formed mainly of tin, and said end portion and said main portion having said metal plating layer formed mainly of tin, and said end portion of the metal wire and an end of said aluminum wire are put in contact with each other, and said arc welding is carried out at said end portion of the metal wire and end of the aluminum wire. ### Claim 3 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein said end portion of the metal wire having said metal plating layer is coated with a welded portion formed through said arc welding. ### Claim 4 (depends on 1) The process for manufacturing a lead terminal for a capacitor according to claim 1, wherein a welded portion formed through said arc welding between said metal wire and aluminum wire does not extend out over the portion of the metal wire having no metal plating layer formed mainly of tin. ### Claim 5 (depends on 1) The process for manufacturing a lead terminal for a capacitor according to claim 1, wherein said metal wire has a tapered surface formed toward said end of said metal wire. ### Claim 6 (depends on 1) The process for manufacturing a lead terminal for a capacitor according to claim 1, wherein a recess is provided on a surface at said end of said aluminum wire, and said end of said metal wire is put in contact within the recess. ### Claim 7 (depends on 1) The process for manufacturing a lead terminal for a capacitor according to claim 1, wherein a welded portion formed through said arc welding between the metal wire and the aluminum wire is made into a desired form using a die when said arc welding is carried out. ### Claim 8 (depends on 7) The process for manufacturing a lead terminal for a capacitor according to claim 7, wherein said die is provided in a chuck for holding said metal wire. ### Claim 9 (depends on 1) The process for manufacturing a lead terminal for a capacitor according to claim 1, wherein a welded portion formed through said arc welding between the metal wire and the aluminum wire is made into a desired form using a die when said arc welding is carried out, and said die is provided and positioned so as to cover said portion having no metal plating layer formed mainly of tin, and the welded portion formed through said arc welding and said metal plating layer formed mainly of tin are separated from each other by means of the die. ### Claim 10 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein a welded portion formed through said arc welding between said metal wire and aluminum wire does not extend out over the gap portion of the metal wire having no metal plating layer formed mainly of tin. ### Claim 11 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein said metal wire has a tapered surface formed toward said end portion of said metal wire. ### Claim 12 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein a recess is provided on a surface at said end of said aluminum wire, and said end portion of said metal wire is put in contact within the recess. ### Claim 13 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein a welded portion formed through said arc welding between the metal wire and the aluminum wire is made into a desired form using a die when said arc welding is carried out. ### Claim 14 (depends on 2) The process for manufacturing a lead terminal for a capacitor according to claim 2, wherein a welded portion formed through said arc welding between the metal wire and the aluminum wire is made into a desired form using a die when said arc welding is carried out, and said die is provided and positioned so as to cover said gap portion having no metal plating layer formed mainly of tin, and the welded portion formed through said arc welding and said main portion having said metal plating layer formed mainly of tin are separated from each other by means of the die.