Microphone with coined area

• US 9,883,270 B2
• Filed: 05/13/2016
• Issued: 01/30/2018
• Est. Priority Date: 05/14/2015
• Status: Active Grant

• Current Assignee: Knowles Electronics Llc (Knowles Corporation)
• Original Assignee: Knowles Electronics Llc (Knowles Corporation)
• Inventors: Lim, Tony K.
• Primary Examiner(s): Gauthier, Gerald
• Application Number:
  US15/154,545
• Publication Number:
  US 20160337735A1
• Time in Patent Office: 627 Days
• Field of Search: 29594, 257622, 257704, 257415, 257416, 257676, 381111, 381113, 381122, 381174, 381355, 381361, 381369
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2924/16151 Cap comprising an aperture, e.g. for pressure control, encapsulation
• CPC Class Codes: H01L 2924/16152 Cap comprising a cavity for hosting the device, e.g. U-shaped cap
• CPC Class Codes: H04R 1/086 Protective screens, e.g. all weather or wind screens
• CPC Class Codes: H04R 19/005 using semiconductor materials
• CPC Class Codes: H04R 19/04 Microphones H04R19/01 takes precedence
• CPC Class Codes: H04R 2499/11 Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Abstract

A microphone includes a base and a microelectromechanical system (MEMS) die mounted to the base. The microphone also includes an integrated circuit fixed to the base. The microphone further includes a lid mounted to the base that encloses the MEMS die and the integrated circuit within a cavity formed by the base and the lid. The lid has an indented portion extending into but not fully through the lid.

Claims

1. A microphone comprising:

a base;

a microelectromechanical system (MEMS) die mounted to the base,

an integrated circuit fixed to the base;

a lid mounted to the base that encloses the MEMS die and the integrated circuit within a cavity formed by the base and the lid, wherein the lid has an indented portion extending into but not fully through the lid.

2. The microphone of claim 1, wherein the indented portion comprises at least one opening that extends through the lid.

3. The microphone of claim 2, wherein the at least one opening comprises a plurality of openings.

4. The microphone of claim 2, wherein the at least one opening is configured to prevent ingress of contaminants.

5. The microphone of claim 2, wherein the at least one opening is a single opening.

6. The microphone of claim 5, wherein the single opening does not prevent the ingress of contaminants.

7. The microphone of claim 1, wherein a port extends through the base, and wherein the MEMS die is mounted on a surface of the base that surrounds the port.

8. The microphone of claim 1, further comprising a mesh screen that is disposed at least partially in the indented portion.

9. The microphone of claim 8, wherein the mesh screen is completely disposed in the indented portion.

10. The microphone of claim 8, wherein the indented portion comprises an opening, and wherein the mesh screen covers the opening.

11. The microphone of claim 8, wherein the mesh screen extends out of the indented portion.

12. The microphone of claim 1, wherein edges around the perimeter of the indented portion are rounded.

13. The microphone of claim 1, further comprising wires between the integrated circuit and the MEMS device, wherein the indented portion allows a greater freedom of movement for the wires.

14. The microphone of claim 1, wherein the base comprises a top surface and a bottom surface, and wherein the MEMS die and the lid are mounted to the top surface of the base.

15. The microphone of claim 1, wherein the indented portion is on an inside surface of the lid.

16. The microphone of claim 15, wherein the lid comprises a plurality of indented portions.

17. The microphone of claim 1, wherein the indented portion is on an outside surface of the lid.

18. The microphone of claim 1, wherein edges around the perimeter of the indented portion are square.

19. The microphone of claim 1, wherein the lid is made of a metal, and wherein the base comprises a printed circuit board.

20. The microphone of claim 1, wherein the lid comprises two printed circuit board pieces.

21. The microphone of claim 1, wherein the lid does not comprise an opening.