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Background:
The Semiconductor Industry has an increasing demand for mechanisms that can align computer chips of many sizes in order to properly seat pins and carry out testing procedures. Delta Design's solution for meeting the demand of computer chip manufacturers is to produce mechanisms in which chips as large as 48mm x 48mm can be aligned in a stage that is only 52mm x 52mm, maximizing the range of possible chip sizes for the future.
The Semiconductor Industry has an increasing demand for mechanisms that can align computer chips of many sizes in order to properly seat pins and carry out testing procedures. Delta Design's solution for meeting the demand of computer chip manufacturers is to produce mechanisms in which chips as large as 48mm x 48mm can be aligned in a stage that is only 52mm x 52mm, maximizing the range of possible chip sizes for the future.
Key Objectives:
Key Objectives:
Reduce the number of actuators needed for controlled x, y, and θ movement from four to three in order to implement the simplicity of classic 3 actuator control design.
Find a bearing solution that will minimize or eliminate friction and normal forces at the intersections of the top and bottom halves of the "xy-stage" depicted.
Ideal Device Constraints:
- Operate with large thermal variations (-70°C to 175°C)
- X, Y range of movement of 0.5mm, θ range of movement of 1°
- 1 micron (0.001mm) of control resolution
- 22 million cycle minimum life
- Bearing friction must be negligible
- Complete full range of motion within 100 milliseconds
Project Deliverables:
The final deliverable for this project will be a scaled up model of the actual 3-wire actuation solution. This model is meant to serve as a translatable design solution to Delta Design's actual-size micro-alignment mechanism.
Final Deliverable Details:
Frame milled from aluminum
Actuation by shape memory alloy wires and bias springs
Wire flexures in place of traditional bearings
Other Components Delivered:
Arduino proto-board, schematics, control code, and power delivery system
Test stages/prototypes: 1-degree of freedom stage, 3-DOF stage, and flexure compression test stand
Associated test data, records, and results
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