Microphone system with non-orthogonally mounted microphone die

• US 9,769,562 B2
• Filed: 12/02/2015
• Issued: 09/19/2017
• Est. Priority Date: 01/22/2013
• Status: Active Grant

• Current Assignee: Invensense Incorporated (TDK Corporation)
• Original Assignee: Invensense Incorporated (TDK Corporation)
• Inventors: Khenkin, Aleksey S., Venkatadri, Vikram, Bolognia, David
• Primary Examiner(s): Nguyen, Duc
• Assistant Examiner(s): Nguyen, Sean H
• Application Number:
  US14/957,054
• Publication Number:
  US 20160088389A1
• Time in Patent Office: 657 Days
• Field of Search: 381355
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H04R 1/00 Details of transducers, loudspeakers or microphones
• CPC Class Codes: H04R 1/04 Structural association of microphone with electric circuitry therefor in deaf-aid sets H04R25/00
• CPC Class Codes: H04R 1/083 Special constructions of mouthpieces
• CPC Class Codes: H04R 1/326 for microphones H04R1/34 and H04R1/40 take precedence
• CPC Class Codes: H04R 11/04 Microphones
• CPC Class Codes: H04R 17/02 Microphones
• CPC Class Codes: H04R 21/02 Microphones
• CPC Class Codes: H04R 2201/003 Mems transducers or their use
• CPC Class Codes: H04R 9/08 Microphones

Abstract

A microphone system has a lid coupled with a base to form a package with an interior chamber. The package has a top, a bottom, and a plurality of sides, and at least one of those sides has a portion with a substantially planar surface forming an opening for receiving an acoustic signal. The microphone system also has a microphone die positioned within the interior chamber. The microphone is positioned at a non-orthogonal, non-zero angle with regard to the opening in the at least one side.

Claims

1. A microphone system comprising:

a base having a top surface, a bottom surface, a primary portion and a ramped portion, the primary portion being generally planar and substantially parallel to the bottom surface, the ramped portion generally forming an obtuse angle “

OB”

with the primary portion, the base additionally having at least one side with an upwardly extending portion, the OB formed between two base regions;

a lid coupled with the base to form a package with an interior chamber, the upwardly extending portion of the base forming an audio input port, the audio input port positioned externally to the interior chamber for receiving an acoustic signal, the upwardly extending portion and the ramped portion forming an opening through which the received acoustic signal is guided;

a microphone die positioned within the interior chamber and on top of the ramped portion at an angular position corresponding to the OB of the ramped portion, wherein the ramped portion is positioned under the microphone die to support said microphone die and forms a channel that directs the acoustic signal from the audio input port through a side face of the package to the microphone die, wherein the base further has at least one location protrusion to position the lid on the top surface of the base.

2. The microphone system of claim 1, wherein a sidewall of the lid has a specially shaped contour receiving the upwardly extending portion of the base, the upwardly extending portion being complementary to the specially shaped contour.

3. The microphone system of claim 1, wherein the package has a substantially rectangular shape.

4. The microphone system of claim 1, wherein the package has a shape other than a substantially rectangular shape.

5. The microphone system of claim 1, wherein the microphone die is a MEMS microphone die.

6. The microphone system of claim 1, wherein the lid has a plurality of sidewalls, one of the sidewalls of the lid having a specially shaped contour to receive the upwardly extending portion.

7. The microphone system of claim 1, wherein the channel is formed through the package extending between the opening and a port in the interior chamber on the ramped portion of the base.

8. The microphone system of claim 1, wherein the channel has a generally smooth internal contour.

9. The microphone system of claim 1, wherein the channel is configured to direct the acoustic signal in a manner as to hit a backplate of the microphone and eventually hit a diaphragm of the microphone.