Patent ID: 7276316
Filing Date: 2007-10-02
Classification: G03F

Abstract:
1. A method of making an embedded attenuated phase shift mask (EAPSM) comprising: providing a phase shift mask substrate having a layer of phase shifting material and a layer of an opaque material; depositing a first resist layer on the substrate; exposing and developing the first resist layer and etching the substrate to create first level phase shifting image segments on the substrate corresponding to areas of critical structures to be exposed with the EAPSM; depositing a second resist layer on the substrate having first level phase shifting image segments; providing a single frame exposure mask corresponding to non-critical areas outside the critical structure areas; using the single frame exposure mask, exposing the second resist layer; developing the second resist layer; etching the critical structure areas to remove the opaque material therefrom; marking the single frame exposure mask with an identification corresponding to the EAPSM or corresponding to chip or field size of the EAPSM; storing the single frame exposure mask in a mask library for future use; obtaining the single frame exposure mask from the mask library; and using the single frame exposure mask to repair or remanufacture the EAPSM.