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Laser Welding Using Fiber Optics

IP.com Disclosure Number: IPCOM000061913D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Ainslie, N: AUTHOR [+7]

Abstract

Laser welding of fine wires to substrates can be made by using a thermal compression bonding tip modified with a micron-sized slot. The laser beam is transmitted using an optical fiber which is inserted into the conical hollow of the tip. A slot holds the wire in position with respect to the optical fiber while the optical fiber both heats the tip and is projected through the tip opening onto the weld.

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Laser Welding Using Fiber Optics

Laser welding of fine wires to substrates can be made by using a thermal compression bonding tip modified with a micron-sized slot. The laser beam is transmitted using an optical fiber which is inserted into the conical hollow of the tip. A slot holds the wire in position with respect to the optical fiber while the optical fiber both heats the tip and is projected through the tip opening onto the weld.

In the figure, a tungsten capillary tip 1 is shown for use with a laser beam source 2. The tungsten tip 1 is shown to have a conical hollow 3 tapering to an exit hole 4 with slot 5. An optical fiber 6 is inserted into the conical hollow 3 of the tip 1 for projection and heating.

In operation, the tip 1 is heated by multiple reflection/ absorption of the laser energy delivered into the tip. The heated tip, in turn, heats the wire by direct contact with slot 5. In addition, the capillary hole 4 allows for projection of laser energy for heating the weld site by metallic absorption to complete melting in a rapid manner.

Disclosed anonymously.

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