Patent ID: 6960506
Filing Date: 2005-11-01
Classification: H01L

Abstract:
1. A method of forming a memory device having a self-aligned contact, comprising: providing a substrate having a floating gate dielectric layer formed thereon; forming a floating poly gate layer on the floating gate dielectric layer; forming a first silicon nitride layer on the floating poly gate layer; forming a patterned photoresist layer on the first silicon nitride layer; etching exposed areas of the first silicon nitride layer and the floating poly gate layer using the patterned photoresist layer as an etch mask; forming an oxide layer over the exposed etched areas; removing the patterned photoresist layer and the first silicon nitride layer to expose the floating poly gate layer; forming poly spaces in the floating poly gate layer; and depositing a second silicon nitride layer over the poly spaces of the floating poly gate layer to form a self-aligned contact.