Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G4/00—Fixed capacitors; Processes of their manufacture
  • H01G4/002—Details
  • H01G4/228—Terminals
  • H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
  • H01G4/00—Fixed capacitors; Processes of their manufacture
  • H01G4/002—Details
  • H01G4/018—Dielectrics
  • H01G4/06—Solid dielectrics
  • H01G4/14—Organic dielectrics
  • H01G4/18—Organic dielectrics of synthetic material, e.g. derivatives of cellulose

Definitions

• the present invention relates to a capacitor used for an audio equipment.
• capacitors used in audio equipment generally have low loss and good frequency characteristics in other 10 circuits except for circuits that do not significantly affect sound quality.
• Lum capacitors are often used.
• copper may be used for the capacitor electrodes.
• this conventional capacitor has poor heat resistance due to the use of a poly-pyrene or polystyrene as a dielectric material, so soldering to a printed wiring board is difficult. It is vulnerable to heat at the time, and requires more careful attention than other parts, and its elimination has been a major issue in the production of audio equipment.
• the copper is used to make the poly.
• Propylene deteriorates (generally referred to as copper damage), so its reliability is difficult.
• copper foil with a deterioration prevention film has been used, the cost is significantly higher.
• a thin deterioration prevention film withstands heat treatment in the manufacturing process and actual use at high temperatures. Therefore, the reliability was not sufficient for practical use.
• the acoustic capacitor of the present invention uses a polyphenylene sulfide film for the dielectric and uses copper or tin foil for the electrode. Has features.
• Polyphenylene sulfide as a dielectric has higher heat resistance and higher heat resistance than polypropylene, polystyrene and polyethylene terephthalate. Good chemical properties.
• the dielectric material has a small electric loss 0 and a good frequency characteristic. Therefore, excellent characteristics can be obtained as an acoustic capacitor.
• dielectric constant measured at a frequency of 1 KHz.
• PET Polyethylene terephthalate
• FIG. 1 is a cross-sectional view of an acoustic capacitor according to an embodiment of the present invention
• FIG. 2 is an acoustic capacitor according to an embodiment of the present invention and a conventional acoustic capacitor.
• FIG. 3 is a diagram showing a comparison between the sound quality of a sound capacitor according to the embodiment of the present invention and a result of a sound quality evaluation of a conventional sound capacitor.
• FIG. 1 shows an embodiment of an acoustic capacitor according to the present invention. This will be described with reference to FIG. Figure 1 is a sectional view of O. 1 mu ⁇ Acoustic capacitor of an embodiment, the capacitor is superimposed on the alternating polyunsaturated We two les Nsarufu eye Zadoff Lee Lum and copper foil Certificates After turning, the lead wire is attached and the exterior is given.
• reference numeral 1 denotes a 6 ⁇ m-thick polyphenylene sulfide film
• 2 denotes a copper foil having a thickness of 7 ⁇
• 3 denotes an exterior resin
• 4 denotes a lead wire.
• the lead wire 4 is electrically connected to the copper foil 2, and the external resin 3 covers the entire element including the connection portion between the lead wire 4 and the copper foil 2.
• DC direct current
• the capacitor of the present example is clearly superior in the withstand voltage failure rate and other characteristics as compared with the conventional acoustic capacitor.
• the vertical axis in Fig. 3 shows the sound quality evaluation items in the general audio equipment industry
• the horizontal axis shows a general polyethylene film, which is long for acoustic capacitors, and a dielectric film.
• the rating was O based on a capacitor using aluminum foil as an electrode, and the rating was positive if it was better, and negative if it was worse.
• the capacitor of the present invention in all test items is equal to or higher than the sound quality of the conventional acoustic capacitor.
• the result is very good especially in the bass range. This is because the dielectric constant of the Po Li off Yu two les Nsarufu ⁇ y de is 3.
• a high value 1 5 shows in comparison with poly pro propylene Ya poly Suchiro Ichiru.
• the sound quality equivalent to that of the conventional product is that the loss is polypropylene or polystyrene.
• the present inventors conducted a listening evaluation using a capacitor using tin foil as the electrode foil, and obtained good results similar to the case of copper foil20.
• the present invention since a poly-electron-resistor film is used as a dielectric and copper or tin foil is used as an electrode, there is no deterioration due to copper damage, heat resistance and heat resistance. It is possible to realize 25 capacitors for sound with excellent chemical properties. Therefore, the sound used for audio equipment It is intended to improve the reliability of sound capacitors at low cost and to improve the sound quality of acoustic equipment.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=17218770

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (1)

Citations (1)

Family Cites Families (8)

• 1988
  • 1988-10-05 JP JP63251173A patent/JPH0298911A/ja active Granted
• 1989
  • 1989-10-04 WO PCT/JP1989/001013 patent/WO1990004259A1/ja unknown
  • 1989-10-04 DE DE3991163A patent/DE3991163C1/de not_active Expired - Fee Related
  • 1989-10-04 KR KR1019900701197A patent/KR900702548A/ko not_active Abandoned

Patent Citations (1)

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