Resources Contact Us Home
Manufacturing method of acoustic sensor

Image Number 4 for United States Patent #7080442.

The present invention relates to a semiconductor electret condenser microphone capable of being reduced in size and including an acoustic sensor 100 and a case 200 for accommodating the acoustic sensor 100, the acoustic sensor 100 has a semiconductor chip 110 forming necessary electronic circuits 111A to 111C, and opening a through hole 112 away from the electronic circuits 111A to 111C, an electrode layer 120 formed on the surface of the semiconductor chip 110 away from the through hole 112, an electret member 130 laminated away from part of the electrode layer 120 and through hole 112, and a diaphragm 140 provided with a spacing 160 to the electret member 130, in which the electrode layer 120 exposed from the electret member 130 is connected to the electrode 111a of the electronic circuit 111A through the case 200 (FIG. 6).

  Recently Added Patents
Nanoparticles in a flash memory using chaperonin proteins
Dual functional medium shredding machine structure
Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation
Scalable security services for multicast in a router having integrated zone-based firewall
System of providing an internet web site that assists medical professionals draft a letter of medical necessity or other documentation for transmission to a third party payer on behalf of a pa
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Communication system
  Randomly Featured Patents
Hair retaining clip with resilient gripping member
Trailer cover system
Method and system for business information networks
Method and apparatus for acquiring electronic and/or photographic images
Secure communications system with assured synchronization for data exchanged among system ports
Ferroelectric high Tc superconductor RF phase shifter
Acoustical sound proofing material with controlled water-vapor permeability and methods for manufacturing same
Method and apparatus for rapidly changing a magnetic field produced by electromagnets
Grounding casing for electric facility
Method for activating a dampening apparatus