Planar acoustic converting apparatus

A planar acoustic converting apparatus comprising:

• a support having a flat plate portion;
• a diaphragm comprising an insulating base film and being opposed to the flat plate portion of said support, and at least one spiral coil provided on one major surface or both major surfaces of the insulating base film;
• at least one permanent magnet supported by said support and opposing a magnetic pole thereof to said diaphragm;
• a damper sheet provided on a surface of said at least one permanent magnet being opposed to said insulating base film;
• and
• a holding portion provided to said support and holding said diaphragm such that the diaphragm can vibrate and is positioned apart from said at least one permanent magnet.

A planar acoustic converting apparatus comprising:

• a support having a flat plate portion;
• a diaphragm comprising an insulating base film having a liquid crystalline polymer film and being opposed to the flat plate portion of said support, at least one spiral coil provided on one major surface or both major surfaces of the insulating base film, and an insulation film which covers said at least one spiral coil and said insulating base film;
• at least one permanent magnet supported by said support and opposing a magnetic pole thereof to said diaphragm;
• and
• a holding portion provided to said support and holding said diaphragm such that the diaphragm can vibrate and is positioned apart from said at least one permanent magnet.