Patent ID: 9449837
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A method comprising: providing a first substrate having a first redistribution layer (RDL) disposed thereon, wherein a first conductive element is disposed in the first RDL; providing a second substrate having a second RDL disposed thereon; bonding the first RDL to the second RDL; forming an insulating film over the second RDL, wherein the insulating film is disposed around the first RDL and the first substrate; etching a via opening in the insulating film and extending through the first substrate; recessing sidewalls of the first substrate in the via opening; forming a first spacer on the sidewalls of the first substrate in the via opening; and forming a via in the via opening, wherein the via is electrically connected to the first conductive element, and wherein the first spacer is disposed between the via and the first substrate.