JPH054399Y2 - - Google Patents

Info

Publication number

JPH054399Y2

JPH054399Y2 JP1984146167U JP14616784U JPH054399Y2 JP H054399 Y2 JPH054399 Y2 JP H054399Y2 JP 1984146167 U JP1984146167 U JP 1984146167U JP 14616784 U JP14616784 U JP 14616784U JP H054399 Y2 JPH054399 Y2 JP H054399Y2

Authority

JP

Japan

Prior art keywords

electret

diaphragm

back electrode

condenser microphone

microphone unit

Prior art date

1984-09-27

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired - Lifetime

Links

• Espacenet
• Global Dossier
• Discuss

• 239000000463 material Substances 0.000 claims description 14
• 125000006850 spacer group Chemical group 0.000 claims description 7
• 239000003990 capacitor Substances 0.000 description 5
• 238000010586 diagram Methods 0.000 description 2
• 239000007772 electrode material Substances 0.000 description 2
• 239000012528 membrane Substances 0.000 description 2
• 239000002184 metal Substances 0.000 description 2
• 230000010287 polarization Effects 0.000 description 2
• 239000004698 Polyethylene Substances 0.000 description 1
• 238000006073 displacement reaction Methods 0.000 description 1
• 230000000694 effects Effects 0.000 description 1
• 230000001771 impaired effect Effects 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1
• 239000007769 metal material Substances 0.000 description 1
• -1 polyethylene Polymers 0.000 description 1
• 229920000573 polyethylene Polymers 0.000 description 1
• 229920003002 synthetic resin Polymers 0.000 description 1
• 239000000057 synthetic resin Substances 0.000 description 1
• 238000007740 vapor deposition Methods 0.000 description 1