The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2013
Filed:
Oct. 27, 2011
Gregor Feiertag, Munich, DE;
Anton Leidl, Hohenbrunn, DE;
Wolfgang Pahl, Munich, DE;
Matthias Winter, Munich, DE;
Christian Siegel, Munich, DE;
Gregor Feiertag, Munich, DE;
Anton Leidl, Hohenbrunn, DE;
Wolfgang Pahl, Munich, DE;
Matthias Winter, Munich, DE;
Christian Siegel, Munich, DE;
Epcos AG, Munich, DE;
Abstract
A microphone package wherein an MEMS microphone chip (MIC) is mounted on a substrate (SUB) and is sealed with a cover (ABD) with respect to the substrate. The membrane (MMB) of the microphone chip is connected to a sound entry opening (SEO) in the substrate via an acoustic channel. As a result of defined dimensioning of, in particular, the cross section and length of sound entry opening and channel, an acoustic low-pass filter is formed, the −3 dB attenuation point of which is significantly below the natural resonance of microphone membrane and package.