Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1992-02-07
1993-04-20
Britton, Howard W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358106, 358107, 358101, 358227, H04N 718
Patent
active
052047393
ABSTRACT:
A proximity mask alignment system includes a remotely-focusing microscope and a video frame storage device. When a first surface, such as an integrated circuit substrate, is in focus an image of the first surface is obtained and stored. Then, after the microscope is re-focused to a second surface, such as a photomask, the stored image of the first surface is superimposed onto the "live" image of the second surface. The two focal positions are stored, with a selected one being normally provided to the microscope. A user initiates an automatic sequence wherein the microscope focuses to the other focal position, stores an image obtained at the other focal position, then refocuses to the original focal position. The stored image is superimposed on the image currently being generated, enabling the user to simultaneous view each surface in sharp focus, facilitating the alignment of the two surfaces to one another.
REFERENCES:
patent: 3883689 (1975-05-01), Mansour
patent: 4045772 (1977-08-01), Bouton
patent: 4282548 (1981-08-01), Plummer
patent: 4829374 (1989-05-01), Miyamoto
patent: 4851903 (1989-07-01), Ikeda
patent: 4929893 (1990-05-01), Sato
patent: 4938600 (1990-07-01), Into
Britton Howard W.
Karl Suss America, Inc.
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