Browse Prior Art Database

Machine Vision Compatible Set-Up Gauge

IP.com Disclosure Number: IPCOM000102092D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Covell, JH: AUTHOR

Abstract

This article describes a manufacturing tool set-up/accuracy verification gauge that duplicates optical conditions present when processing a given work piece. The methodology for fabrication of this gauge is also described.

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Machine Vision Compatible Set-Up Gauge

       This article describes a manufacturing tool
set-up/accuracy verification gauge that duplicates optical conditions
present when processing a given work piece.  The methodology for
fabrication of this gauge is also described.

      Various high precision automated manufacturing equipment
require a baseline comparator for set-up and/or calibration.
Generally, this takes the form of a "set-up gauge" that does not
accurately duplicate optical properties of whatever is to be
processed.  If this baseline is not perceived by automated sensors in
the same manner as actual product, there is often a random
positioning error to contend with.

      The subject set-up gauge is a stainless steel (PH 15-7 MO)
plate sized to duplicate a TCM substrate.  The polished top side is
selectively etched to produce EC pad replicate features.  The
specular finish on the target areas and diffusing finish background
area result in a video signal that is representative of product
parts.

      Material selection: Material used for a given gauge depends
upon the ability, by use of various surface treatments, to optically
approximate the align target area.  Durability and dimensional
stability are obvious requirements also. Various grades of stainless
steel are ideal in this respect.

      Target requirements and application: A combination of specified
surface polishing and selective etching creates a close approximation
of the act...