Thick film mask separation detection system

Details Thick film mask separation detection system Thick film mask separation detection system

1991-06-07

1992-12-29

Burr, Edgar S.

Printing

Stenciling

101129, 1011271, 156344, 156584, 427282, 437187, 437924, 437948, B41F 1508, H01L 2144

Patent

active

051742012

ABSTRACT:
An apparatus and method for screening a pattern of material onto a surface including detection of the instant of separation of the mask from the surface after screening. Particularly as applied to a process for making a multi-layer ceramic device with an automated apparatus, the screening process is speeded by initiating high speed movement immediately when the separation of the mask from the surface is complete. In a preferred embodiment, a shock absorber is used to limit the rate of change of motion of the mask and a sensor is placed directly on a portion of the shock absorber structure. Noise reduction is accomplished through differential sensing and thresholding to improve detection.

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