Browse Prior Art Database

XYZ Chuck

IP.com Disclosure Number: IPCOM000083871D
Original Publication Date: 1975-Aug-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Wilk, RH: AUTHOR

Abstract

In the manufacturing process required to make multilayer ceramic modules, the exact location of each chip site must be measured on X, Y and Z axes from known and precise reference surfaces.

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XYZ Chuck

In the manufacturing process required to make multilayer ceramic modules, the exact location of each chip site must be measured on X, Y and Z axes from known and precise reference surfaces.

A precise means of locating and holding such modules for chip site location is shown in the drawings. Incorporated in the chuck are one fixed jaw 1 and one movable jaw 2 which establish the location in the X and Y directions. The Z plane is established by three hard pins 3 upon which the workpiece is clamped, the pins being mounted in a carrier plate 4.

Complementing these three pins are three soft pins 5 which first contact the workpiece. These soft pins are used to prevent contact of the three hard pins 3 until the workpiece has been located in the X and Y directions, thereby reducing abrasion on the pins 3 and reducing the possibility of damage to the workpiece.

After the workpiece is roughly located in the chuck, fine location is established as follows:

The pin carrier plate 4 begins to rise and the soft pins 5 contact the workpiece carrying it upward inside the jaws 1 and 2. The final position of the carrier plate 4 is established by three sets of hardened rest buttons 6, see Fig. 2. The plate 4 is spring loaded upward against a face cam 7. By cam followers mounted in the plate at the completion of the travel of the carrier plate 4, the movable jaw 2 slides toward the fixed jaw 1 lightly placing the workpiece against the fixed jaw. Thus X and Y locations are est...