Patent ID: 9271435
Filing Date: 2016-02-23
CPC Classification: B23P,H04R,H05K,Y10T

Claim Text:
1. A method of manufacturing a protection frame used in a miniature microphone comprising: (1) preparing a substrate made of a material that is insulating with a prescribed thickness and a prescribed area; (2) forming a plurality of holes at prescribed intervals on the substrate; (3) forming a first metal shielding layer on an inner surface of each of the plurality of holes formed on the substrate; (4) filling an insulating material in the plurality of holes; (5) forming a plurality of extended portions on surfaces of opposing sides of the substrate, each extended portion covering a part of an end face of the insulating material and a whole end face of the first metal shielding layer of one of the plurality of holes; (6) forming a cavity in each of the plurality of holes that are filled with the insulating material, a caliber of each cavity being slightly smaller than an inner caliber of the extended portions formed in the above mentioned step (5); and (7) cutting the plurality of holes from the substrate to produce a collection of protection frames.