Global Patent Index - EP 1239699 A1

EP 1239699 A1 2002-09-11 - Microphone utilizing optical signal

Title (en)

Microphone utilizing optical signal

Title (de)

Mikrofon mit Verwendung von optischem Signal

Title (fr)

Microphone utilisant un signal optique

Publication

EP 1239699 A1 (EN)

Application

EP 01301970 A

Priority

EP 01301970 A

Abstract (en)

Disclosed is a microphone that can be highly integrated and can be manufactured easily. A light emission element and a light-receiving element mounted on a substrate are sealed with transparent resin, a groove is formed in the sealed portion between the light emission element and the light-receiving element, an optically non-transparent substance is inserted in the groove, and the optically non-transparent substance is adhered to the groove with transparent resin. Thereby, in comparison to the conventional method of cutting the sealed portion together with the substrate, forming an optically non-transparent film on the cut surface, and reintegrating the cut areas, with the present invention, the number of the alignment processes is reduced and the extra margin for the setting process is no longer unnecessary. <IMAGE>

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

H04R 23/00

IPC 8 full level (invention and additional information)

H04R 23/00 (2006.01)

CPC (invention and additional information)

H04R 23/008 (2013.01)

Citation (search report)

  • [Y] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 19 5 June 2001 (2001-06-05)
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 02 29 February 2000 (2000-02-29)
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 06 22 September 2000 (2000-09-22)

Designated contracting state (EPC)

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

DOCDB simple family

EP 1239699 A1 20020911