Patent ID: 9613926
Date: 2017-04-04
CPC Classifications: B81C,H01L

Claim:
1. A method comprising: forming a conductive layer on a first surface of a bonded structure, the bonded structure comprising a first substrate bonded to a second substrate, the first surface of the bonded structure being an exposed surface of the first substrate; forming a patterned mask on the conductive layer, the patterned mask comprising first openings and second openings, the first openings and the second openings exposing portions of the conductive layer; forming first portions of first bonding connectors in the first openings and first portions of second bonding connectors in the second openings; removing the patterned mask from the conductive layer; after removing the patterned mask, patterning the conductive layer to form second portions of the first bonding connectors and second portions of the second bonding connectors, wherein the first portions of the first bonding connectors and the first portions of the second bonding connectors are used as a mask; and bonding the bonded structure to a third substrate using the first bonding connectors and the second bonding connectors, wherein the first bonding connectors and the second bonding connectors extend through third openings formed on a front side of the third substrate and contact conductive features exposed by the third openings.