Exposure method, aligner, and method manufacturing semiconductor

Details Exposure method, aligner, and method manufacturing semiconductor Exposure method, aligner, and method manufacturing semiconductor

1997-08-19

1999-05-11

Rosasco, S.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Radiation mask

G03F9/00

Patent

active

059027053

ABSTRACT:
To prevent positional shifts of the image forming plane during the exposure process using the two-layer phase shift mask, the height position of the semiconductor wafer 14 is moved in the optical axis direction according to the mask substrate thickness of the second component mask 12b, prior to performing the exposure process which uses the stacked-layer mask 12 that comprises a first component mask 12a formed with a pattern of light-shielding areas and light-transmitting areas and a second component mask 12b formed with a phase shift pattern to produce a phase shift in the transmitted light.

REFERENCES:
patent: 5326659 (1994-07-01), Liu et al.

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