Browse Prior Art Database

Multipoint Thermocompression Bonder

IP.com Disclosure Number: IPCOM000092057D
Original Publication Date: 1968-Aug-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Ryan, WJ: AUTHOR [+3]

Abstract

This bonding probe has individually loaded fingers for making thermocompression welds. Inverted pyramid-shaped mandrel 1 serves as a holder permitting the fan-out of curved beam finger shanks 2 and holddown clamps 3. Mandrel 1 has guide slots 4 to support curved beam fingers 5 and to prevent their lateral displacement. Fingers 5 are chisel-tipped to minimize the area of contact. Thus there is exerted a high unit area of bonding force. A chisel tip 6 is displaced slightly forward of the center line of the beam so that a slight inward motion takes place at the same time the beam is being deflected upward. This scuffing generates a frictional force which contributes to making a broader area bond.

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Multipoint Thermocompression Bonder

This bonding probe has individually loaded fingers for making thermocompression welds. Inverted pyramid-shaped mandrel 1 serves as a holder permitting the fan-out of curved beam finger shanks 2 and holddown clamps 3. Mandrel 1 has guide slots 4 to support curved beam fingers 5 and to prevent their lateral displacement. Fingers 5 are chisel-tipped to minimize the area of contact. Thus there is exerted a high unit area of bonding force. A chisel tip 6 is displaced slightly forward of the center line of the beam so that a slight inward motion takes place at the same time the beam is being deflected upward. This scuffing generates a frictional force which contributes to making a broader area bond. The top edge 7 of the front taper cut 8 of tip 6 is above the bottom edge 9 of mandrel 1 so that during deflection a finger 5 pivots about top edge 7 during the bonding operation.

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