Patent ID: 6787397
Filing Date: 2004-09-07
Classification: H01L

Abstract:
A method of forming a semiconductor device having a protective overcoat with enhanced adhesion both to polymeric materials used in packaging and between the layers of said overcoat, the method including the following steps:positioning at least one semiconductor wafers including fabricated integrated circuits into a plasma deposition reactor, evacuating the chamber prior to deposition and depositing a silicon dioxide layer using a PETEOS (plasma enhanced tetraethyl ortho silicate) process, changing the gas supply in the chamber to include a silane, nitrogen and ammonia, using a PECVD (plasma enhanced chemical vapor deposition) process depositing on said silicon dioxide layer a layer of silicon nitride thinner than said silicon dioxide layer, changing the gas supply in the chamber to deposit a film of silicon dioxide on said layer of silicon nitride which is thinner than said silicon dioxide layer using a PETEOS process, and applying a photoresist, photopatterning the bond pads and/or other openings, and etching the openings in the protective overcoat using a dry etch process.