The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 1997
Filed:
Jan. 30, 1995
Abstract
A flux containing an activator of the nonionic halogen group is used in soldering one end of each of lead terminals 6a and 6b to each of drawing electrodes 5a and 5b of a ceramic element 2. After soldering them, a wax 9 is dripped on the periphery of vibrating electrodes 4a and 4b of the ceramic element 2. Then, an outer resin 10 is applied around the periphery of the ceramic element 2 and so on. By drying the outer resin 10, a solvent contained in the outer resin 10 is dispersed to the outside, and pores are formed in the outer resin 10 on paths through which the solvent has been dispersed. At the same time, a part of a residual flux 11 is absorbed into the pores formed in the outer resin 10. The whole is heated to 150.degree. C. to harden the outer resin 10. When the whole is heated, the wax 9 and the remaining part of the residual flux 11 are absorbed into the pores of the outer resin 10. As a result, a cavity 8 is formed around the periphery of the vibrating electrodes 4a and 4b. When the whole has been heated to 150.degree. C., the outer resin 10 is hardened, and an outer member 7 is formed.