Hybrid multi-layer mask

Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Radiation mask

Reexamination Certificate

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C430S394000

Reexamination Certificate

active

08003281

ABSTRACT:
A hybrid mask set for exposing a plurality of layers on a semiconductor substrate to create an integrated circuit device is disclosed. The hybrid mask set includes a first group of one or more multi-layer masks (MLMs) for a first subset of the plurality of layers. Each MLM includes a plurality of different images for different layers, the images being separated by a relatively wide image spacer. The hybrid mask set also includes a first group of one or more production-ready masks for a second subset of the plurality of layers. Each production-ready mask includes a plurality of similar images for a common layer, each image being separated by a relatively narrow scribe street.

REFERENCES:
patent: 4849313 (1989-07-01), Chapman et al.
patent: 5995200 (1999-11-01), Pierrat
patent: 6710851 (2004-03-01), Elmer et al.
patent: 6737205 (2004-05-01), Maltabes et al.
patent: 2005/0095509 (2005-05-01), Zhang et al.
Chinese Patent Office, Office Action dated Oct. 14, 2010, Application No. 200910166148.1, 4 pages.

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