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Process to Fabricate Microweld Electrodes

IP.com Disclosure Number: IPCOM000050348D
Original Publication Date: 1982-Oct-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 28K

Publishing Venue

IBM

Related People

Pratz, J: AUTHOR [+3]

Abstract

Spacers can be used to control the gap between two refractory metal electrodes during fusing of dielectric material in the gap at high temperatures.

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Process to Fabricate Microweld Electrodes

Spacers can be used to control the gap between two refractory metal electrodes during fusing of dielectric material in the gap at high temperatures.

The two electrodes 10 are rough-machined or partially completed in one direction for added stiffness and machined to size in the other direction, as shown in Fig. 1.

The extra metal 12 left on each electrode is to prevent the electrode's deformation during furnace reflow. As is shown in Fig. 2, two strips of quartz 14 are then deposited (using a masking technique and vacuum sputtering apparatus) on the electrodes to serve as spacers. The spacers have a softening point which is higher than the melting point of the glass or ceramic cement to be placed in the gap, thus preventing the two electrodes from coming in physical contact during the furnace bonding operation.

The glass or ceramic cement 16 is spread over the gap side of each electrode and around the quartz spacers while the two electrodes are held spaced apart in an alignment fixture. Closing the fixture brings the two electrodes together, leaving the proper gap in between them as shown in Fig. 3.

After the dielectric fusion or curing cycle is completed, the now one-piece welding tip is ground and dressed to its final shape and dimensions using the appropriate grinding wheel and abrasive file.

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