Mask set mismatch

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

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430 22, 356401, 356399, 355 40, G03C 506

Patent

active

043883869

ABSTRACT:
A method for marking a mask set to insure minimum mismatch between the masks when they are assembled into a set. Each mask in the set is evaluated against a known fixed standard, identified and marked such that when the set is assembled and utilized to produce an integrated circuit minimum mismatch between each element in each mask in the set will be realized.

REFERENCES:
patent: 4070117 (1978-01-01), Johannsmeier et al.
patent: 4103998 (1978-08-01), Nakazawa et al.
patent: 4134066 (1979-01-01), Vogel et al.
patent: 4153367 (1979-05-01), Lietar et al.
patent: 4193687 (1980-05-01), Reekstin et al.
patent: 4251160 (1981-02-01), Bouwhuis et al.
Coffey, P. H., "An X-Y Measuring System," Kodak Micro-Electronics Seminar Proceedings, Oct. 1-3, 1978, pp. 1-14.
Rottmann, H. R., "Overlay in Lithography," Semiconductor International, Dec. 1980, pp. 83-94.

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