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Robotic Ball Attach System
Nortel Networks Semiconductor (1999)
   
 

Design Objective:
Redesign a robotic semiconductor assembly system that attaches 352 three-quarter-millimeter spherical lead balls to the surface of a microchip. The goal is to improve speed, reliability, and automation.

Design Solution:
Introduce an automated sprayer to coat the balls in flux and a new pick and place piston assembly to remove the need for secondary processing. Reprogram new ball pickup and release sequences to improve reliability.

 
 
 
750 micron solder balls

Result:
Cycle time was reduced by 50% and the need for operator intervention was further reduced. The robot was also programmed to perform a separate activity that replaced the task of one operator.

Time: 4 month internship
Tools: AutoCAD, Visio, Ladder Logic, BASIC
Team: (engineering intern), engineering mentor

Ball Grid Array Chip
PLC ladder logic
   
Robot arm with PLC devices on table
Semiconductor manufacturing cleanroom
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