Browse Prior Art Database

Framing Glass to Create Molybdenum Masks

IP.com Disclosure Number: IPCOM000075347D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Giuffre, GJ: AUTHOR

Abstract

The essential feature of this process is the combination of a modified reversal photographic technique, with the utilization of the nonexposed portion from the first exposure step to create a specified combined pattern.

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Framing Glass to Create Molybdenum Masks

The essential feature of this process is the combination of a modified reversal photographic technique, with the utilization of the nonexposed portion from the first exposure step to create a specified combined pattern.

Basically, this process is as follows: a correct negative frame 10 is contact printed onto plate 12. Plate 12 is developed using the reversal process up to and including the cleaning bath wash, and then the plate is dried.

The unexposed portion is still sensitive to white light and this is the area where the second image is created. This plate is maintained in safe light conditions until second exposure is made.

Plate 12 is placed into an alignment fixture where a correct positive image plate 14, is aligned to the image on plate 12, and a second exposure made. The exposed plate is then processed through the remaining steps of the conventional reversal process and the resulting image is a framed master or compound image. This process finds wide application wherever it is necessary to create two separate images onto one emulsion photographic plate.

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