Patent ID: 9481566
Filing Date: 2016-11-01
CPC Classification: B81B,B81C,H01L,H03H

Claim Text:
1. A method of forming a semiconductor device comprising an integrated circuit and a MEMS device operatively coupled with the integrated circuit, comprising: forming an electrically conductive via extending at least partially through a substrate from a first major surface of the substrate toward an opposing second major surface of the substrate; fabricating at least a portion of an integrated circuit on the first major surface of the substrate; and providing a MEMS device on the second major surface of the substrate and operatively coupling the MEMS device with the integrated circuit using the at least one electrically conductive via, wherein providing the MEMS device on the second major surface of the substrate comprises integrally forming at least a portion of the MEMS device on the second major surface of the substrate, integrally forming the at least a portion of the MEMS device on the second major surface of the substrate comprising: forming at least one transducer cavity recess in the second major surface of the substrate; and bonding an SOI-type structure to the second major surface of the substrate, the SOI-type substrate including a relatively thin layer of material bonded to a relatively thick volume of bulk material with an intermediate material between the relatively thin layer of material and the relatively thick volume of bulk material; removing a portion of the SOI-type structure and leaving the thin layer of material bonded to the second major surface of the substrate; and configuring a portion of the thin layer of material over the transducer cavity recess to comprise at least a portion of a transducer of the MEMS device; and further comprising thinning the substrate after fabricating the at least a portion of the integrated circuit on the first major surface of the substrate and before providing the MEMS device on the second major surface of the substrate.