Photocopying – Projection printing and copying cameras – Identifying – composing – or selecting
Patent
1981-08-03
1984-06-05
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Identifying, composing, or selecting
355 54, G03B 2752, G03B 2770
Patent
active
044525265
ABSTRACT:
A step-and-repeat alignment and exposure system is provided with an adjustable holder for holding a main reticle, a main optical unit including a projection lens for producing an image of the main reticle at an image plane, a stage movable along coordinate axes adjacent to the image plane, and a holder rotatably mounted on the stage for holding a semiconductive wafer to be aligned with respect to the image of the main reticle. The system is further provided with an adjustable holder for holding an auxiliary reticle, a single channel auxiliary optical unit including a main objective lens for producing an image of the auxiliary reticle at the image plane, and a reference mark disposed on the stage and aligned with respect to the coordinate axes. The stage may be controlled for positioning the reference mark directly beneath either the projection lens or the main objective lens of the single channel auxiliary optical unit so that the images of both the main reticle and the auxiliary reticle may be aligned with respect to the reference mark and, hence, with respect to the coordinate axes, and so that the relative spacing between these images may be determined and checked from time to time. This permits the main optical unit and the auxiliary optical unit to be employed interchangeably in globally and precision region-by-region aligning the semiconductive wafer with respect to the coordinate axes prior to employing the projection lens in the photometric step-and-repeat printing of the image of the main reticle at each of an array of different regions on the semiconductive wafer. The system also includes a light source unit for selectively frontally illuminating the entire field of view of the main objective lens of the single channel auxiliary optical unit with white light not passing through the auxiliary reticle.
REFERENCES:
patent: 3192844 (1965-07-01), Szasz et al.
patent: 3461566 (1969-08-01), Gerstner
patent: 3476476 (1969-11-01), Chitayat
patent: 3563648 (1971-02-01), Baggaley et al.
patent: 3610750 (1971-10-01), Lewis et al.
patent: 3685117 (1972-08-01), Wing et al.
patent: 3704946 (1972-12-01), Brault et al.
patent: 3716296 (1973-02-01), Springer et al.
patent: 3853398 (1974-12-01), Kano
patent: 3876301 (1975-04-01), Kosugi
patent: 3917399 (1975-11-01), Buzawa et al.
patent: 3940211 (1976-02-01), Johannsmeier
patent: 3984186 (1976-10-01), Momose et al.
patent: 4011011 (1977-03-01), Hemstreet et al.
patent: 4040736 (1977-08-01), Johannsmeier
patent: 4057347 (1977-11-01), Moriyama et al.
patent: 4110762 (1978-08-01), Tigreat
patent: 4128331 (1978-12-01), Nakamura
patent: 4367046 (1983-01-01), Lacombat
Patent Abstracts of Japan, vol. 2, No. 92, Jul. 28, 1978, p. 4306 E 78, JP-A-53-56975.
Solid State Technology, vol. 23, No. 8, Aug. 1980, "The Unique Fully Automatic Direct Wafer Steppers from Optimetrix are now in Production", Circle 93.
Johannsmeier Karl-Heinz
Phillips Edward H.
Griffin Roland I.
Optimetrix Corporation
Wintercorn Richard A.
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