Patent ID: 9240418
Filing Date: 2016-01-19
CPC Classification: G11C,H01L

Claim Text:
1. A wordline structure, comprising: a plurality of wordlines formed to include an ONO layer that is formed parallel to and directly contacting a substrate, the substrate comprising a plurality of source/drain regions having a first impurity implantation dosage; and a plurality of respective oxide spacers disposed above respective source/drain regions of the plurality of source/drain regions and between wordlines to provide an insulation between adjacent wordlines, wherein each respective oxide spacer comprises a depression formed on a surface of the respective oxide spacer, wherein each respective oxide spacer contacts two adjacent wordlines to fill a space between the two adjacent wordlines, wherein the plurality of wordlines comprise a first salicide are formed by a first salicidation process while shielding other regions from being subjected to the same first salicidation process, and wherein a peripheral region adjacent to the plurality of wordlines has a second impurity implantation dosage that is greater than the first impurity implantation dosage, and comprises a second salicide formed by a different second salicidation process, wherein said first salicide has a first thickness that is greater than a second thickness of said second salicide.