Patent ID: 9252180
Filing Date: 2016-02-02
CPC Classification: H01L,H04N

Claim Text:
1. An image sensor device, comprising: a substrate having a front surface, a back surface, and a sidewall perpendicular to the front and back surfaces; a radiation-detection device formed in the substrate, the radiation-detection device being operable to detect radiation waves that enter the substrate through the back surface; an interconnect structure formed on the front surface of the substrate, the interconnect structure having an extended portion that extends beyond the sidewall of the substrate; and a bonding pad structure comprising: an interlayer dielectric layer formed on the extended portion of the interconnect structure; an isolation layer formed on the interlayer dielectric layer; a conductive pad having a planar portion formed on the isolation layer, and one or more bridging portions extending generally perpendicularly from the planar portion, through the interlayer dielectric and the isolation layers, and to the interconnect structure for establishing electric contact therewith; and a plurality of non-conducting stress-releasing structures, wherein the non-conducting stress-releasing structures are disposed vertically between the isolation layer and a portion of the conductive pad and horizontally between the one or more bridging portions and a portion of the conductive pad, and wherein each of the non-conducting stress-releasing structures is fully enclosed by the isolation layer and the conductive pad, and is in direct contact with both the isolation layer and the conductive pad.