Browse Prior Art Database

Mask Control Conversion Systems

IP.com Disclosure Number: IPCOM000086880D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Fluegel, JG: AUTHOR [+3]

Abstract

Existing handling of glass masks through the manufacturing line involves manual handling of masks, logging of usage, and depends upon the operator to determine mask validity and when cleaning is required.

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Mask Control Conversion Systems

Existing handling of glass masks through the manufacturing line involves manual handling of masks, logging of usage, and depends upon the operator to determine mask validity and when cleaning is required.

A mask control conversion system eliminates these problems by using plastic frames with machine-readable identification (ID) permanently bonded to the mask, automatic handling equipment to unload the mask from a sealed cartridge and position it in an alignment tool, and sensors and interlocks under computer control. All masks are uniquely identified to the system using the identification number, and a summary of the mask status, usage, location, specifications and history is kept on a direct-access device. The mask ID is read automatically during the loading process on the align tool, and computer verification and authorization is required for the loading process to be completed. Once in the tool, mask usage is compared to a product specification. When the specification level is reached indicating that cleaning and inspection is required, an unload cycle is initiated. All data related to the cycle is logged against the mask.

The system is able to determine tool status, utilization and throughput based on readings from its sensors. In the event of a computer failure, monitoring ceases and is detected by the tool. The tool then switches to manual mode, with the operator verifying the masks and recording usage. This feature prevents...