Title:
TUBULAR VARISTOR AND METHOD OF FORMING ELECTRODE THEREOF
Document Type and Number:
Japanese Patent JP3109348
Kind Code:
B2
Abstract:
PURPOSE: To provide a tubular varistor having easily controlled adhesion between electroless plating layers by adjusting eutectic fluororesin content of an electroless plating layer direct on a ceramic substrate.
CONSTITUTION: A sintered object 1 composed mainly of titanium oxide is roughened in its surface, and it is dipped in sensitizer, activator and fluororesin- containing electroless Ni plating solution in sequence, so as to form a first layer 2b of an electroless Ni plating solution that contains fluororesin. The fluororesin content in the solution may vary. After heat-treated in an electric furnace, the sintered object is dipped sequentially in sensitizer, activator, and electroless Ni plating solution that does not contain fluororesin, so as to form a second layer 2a of a fluororesin-free electroless Ni plating solution on the first layer 2b. A solder layer 3 is formed on the second layer by electroplating.
Inventors:
Yoshiomi Go
Hideaki Wada
Takuya Yamazaki
Hideaki Wada
Takuya Yamazaki
Application Number:
JP27934293A
Publication Date:
November 13, 2000
Filing Date:
November 09, 1993
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
H01C7/10; (IPC1-7): H01C7/10
Domestic Patent References:
| JP63246506A | ||||
| JP442504A |
Attorney, Agent or Firm:
Takeshi Shigeno