Texas Instruments Corporation

Michael W Pryor

Peter J Sakakini

Henry L Humphrey

Scott Anthony Delmont

A leadframe loader having a magnetic latch of predefined strength connecting a drive arm mechanism and a pusher system is the preferred embodiment of a transport loader. The amount of force applied to a pusher blade is set to a level below that where a leadframe, or other device to be pushed would be damaged by selecting the size and strength of a magnetic latch attached to the drive arm. The magnet is designed to break away from the steel coupling structure on the pusher when the force exceeds a preset value, and stops the movement before damage to the leadframe occurs. Calculated values were verified by physical testing, and a safety margin assigned to insure release of the magnet prior to bending leadframes. The system is assimilated into different pieces of semiconductor assembly equipment.

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Waco, TX, United States of America

Michael W Pryor