Global patent index - EP 1085783 A2

EP 1085783 A2 2001-03-21 - Charging method and charging equipment of diaphragm for condenser microphone

Title (en)

Charging method and charging equipment of diaphragm for condenser microphone

Title (de)

Verfahren zur Ladung und Ladungsgerät einer Membran eines Kondensator-Mikrofon

Title (fr)

Procédé et dispositif de charge pour diaphragme de microphone à condensateur

Publication

EP 1085783 A2 (EN)

Application

EP 00305827 A

Priority

KR 19990040432 A

Abstract (en)

A charging method and equipment of a diaphragm (10) for a condenser microphone capable of charging an electric charge to the diaphragm (back plate) built in the condenser microphone, that is, a thin film made of a high polymer material having a conductive material deposited on the both sides thereof by corona discharging and ion implanting. The method comprises the steps of: supplying positive ions provided from a positive ion generating apparatus (3) and negative ions provided from a negative ion generating apparatus to a path to which a high voltage is applied to thereby form a corresponding space as an air layer of a conductive medium; and implanting electric charges formed by corona discharging upon application of the high voltage to the diaphragm to thereby form electric double layers on the thin film of the high polymer material. <IMAGE>

IPC 1-7 (main, further and additional classification)

H04R 19/00

IPC 8 full level (invention and additional information)

H04R 19/01 (2006.01); H04R 19/00 (2006.01); H04R 19/04 (2006.01)

CPC (invention and additional information)

H04R 19/04 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1085783 A2 20010321; CN 1289219 A 20010328; JP 2001112091 A 20010420; KR 100306262 B1 20011102; KR 20000000129 A 20000115; TW 490986 B 20020611

INPADOC legal status

2003-08-20 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030203

2001-03-21 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-03-21 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: AL;LT;LV;MK;RO;SI