Electrode plate electret of electro-acoustic transducer and its manufacturing method
First Claim
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1. 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.
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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.
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Citations
10 Claims
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1. A method for the manufacture of an electrode plate electret for an electrostatic type electro-acoustic transducer, comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for the manufacture of an electrode plate electret for an electrostatic type electro-acoustic transducer, comprising the steps of:
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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. - View Dependent Claims (8)
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9. An electrode plate electret for an electrostatic type electro-acoustic transducer, comprising:
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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. - View Dependent Claims (10)
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Specification