| Design Objective - Ball Attach |
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. |
| Understand/Observe - Ball Attach |
• Learned the existing system design and constraints • Learned ladder logic to control programmable logic control (PLC) devices |
| Visualize - Ball Attach |
• Sketched possible solution on whiteboards and paper • Met with engineering mentor to brainstorm solutions |
| Evaluate/Refine - Ball Attach |
• Modeled design in AutoCAD • Experimented with different ball pickup and drop off sequences for increased reliability |
| Implement - Ball Attach |
• Created part drawings to send out for machining • Ordered new OEM parts • Reprogrammed Seiko robot and Omron PLC devices • Installed, integrated, and tested new system |
| Alex Tam - WORK | |||||||||||||||||||||||||||||||||
| Design Highlights • Interaction Design • Product Design | Resume | ||||||||||||||||||||||||||||||||
| Product Design Projects | |||||||||||||||||||||||||||||||||
| Understand/ Observe |
Visualize | Evaluate/ Refine |
Implement | ||||||||||||||||||||||||||||||
| Robotic Ball Attach System Nortel Networks Semiconductor (1999) |
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Design Objective: Design Solution: |
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750 micron solder balls |
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Result: Time: 4 month internship |
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Ball Grid Array Chip |
PLC ladder logic |
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Robot arm with PLC
devices on table |
Semiconductor manufacturing
cleanroom |
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