Browse Prior Art Database

Control Scratch Generator for Plasma Panel Face Plates

IP.com Disclosure Number: IPCOM000043787D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Campagna, F: AUTHOR [+3]

Abstract

In plasma panel fabrication, one of the glass plate criteria requires an optical clearing analysis to determine whether surface scratches on the plate fall within acceptable limits. The equipment to provide this test is basically an X-Y programmable table with a fixed head containing a ball slide (Z-stage) as shown in Fig. 1. On the ball slide is mounted a diamond stylus and a platform on which weights are used to apply a dead load to the diamond stylus. Using a series of weights, a matrix containing data on scratch defect levels vs. load can be constructed. The scratch dimensions are then measured using a profilometer. Following the bonding of the face plate to the plasma panel display using an appropriate index of refraction epoxy adhesive, the degree of healing or clearing of scratches is determined optically.

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Control Scratch Generator for Plasma Panel Face Plates

In plasma panel fabrication, one of the glass plate criteria requires an optical clearing analysis to determine whether surface scratches on the plate fall within acceptable limits. The equipment to provide this test is basically an X-Y programmable table with a fixed head containing a ball slide (Z-stage) as shown in Fig. 1. On the ball slide is mounted a diamond stylus and a platform on which weights are used to apply a dead load to the diamond stylus. Using a series of weights, a matrix containing data on scratch defect levels vs. load can be constructed. The scratch dimensions are then measured using a profilometer. Following the bonding of the face plate to the plasma panel display using an appropriate index of refraction epoxy adhesive, the degree of healing or clearing of scratches is determined optically. This determination is coupled with the scratch dimension data, the basis of acceptance criteria for both the plasma panel and face plate scratches.

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