Electrode plate electret of electro-acoustic transducer and its manufacturing method
AssigneeHosiden Electronics Co., Ltd.
InventorsJunichi Tamamura, Yoshiyuki Murakami, Akira Terada
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Abstract
A high molecular film for polarization is disposed on an electrode plate with an intermediate high molecular film sandwiched therebetween to form a laminated member, the intermediate high molecular film having a lower melting point than the high molecular film for polarization. The laminated member is heated at a temperature in the vicinity of the melting point of the intermediate high molecular film to fusion-weld the high molecular film for polarization to the electrode plate through the intermediate high molecular film, and then the high molecular film for polarization is polarized.
Claims10
A method for the manufacture of an electrode plate electret for an electrostatic type electro-acoustic transducer, comprising the steps of:
- forming a laminated member by inserting between a high molecular film for polarization and an electrode plate an intermediate high molecular film having a lower melting point than the high molecular film for polarization;
- heating the laminated member at a temperature near the melting point of the intermediate high molecular film to fusion-weld the high molecular film for polarization to the electrode plate through the intermediate high molecular film;
- and
- polarizing the high molecular film for polarization of the fusion-welded laminated member.
An electrode plate electret manufacturing method according to any one of the preceding claims, wherein the surface of the high molecular film for contact with the intermediate high molecular film is made slightly rough.
A method for the manufacture of an electrode plate electret for an electrostatic type electro-acoustic transducer, comprising the steps of:
- forming a laminated member composed of a polarized high molecular film and an electrode plate with an intermediate high molecular film sandwiched therebetween, the intermediate high molecular film having a lower melting point than the polarized high molecular film;
- and
- heating the laminated member at a temperature near the melting point of the intermediate high molecular film to fusion-weld the polarized high molecular film to the electrode plate through the intermediate high molecular film.
An electrode plate electret for an electrostatic type electro-acoustic transducer, comprising:
- an electrode plate;
- a polarized high molecular film;
- and
- an intermediate high molecular film sandwiched between the electrode plate and the polarized high molecular film and fusion-welded to both of them, the intermediate high molecular film having a lower melting point than the polarized high molecular film.
Dependencies are inferred from the claim text.