Delta Design is an industry leading pick-and-place handler company. Their semiconductor test-handling equipment is used by IC manufacturers around the world. Right now in Delta Design’s newest line of pick-and-place handlers, they rely on tolerance to properly test Integrated Circuits (also known as DUT or Device Under Testing). With the squiggle motor device we will build for them, they will be able to align and adjust whole arrays of DUTs. Our mechanism could prove to be very beneficial to the company’s current design and even be profitable in future lines of pick-and-place handlers.
Project Objectives
High Priority Objectives
Overall height requirement of 9 mm or less
1 mm throw in x and y directions and ±0.5 degrees in θ
Using mechanical advantage to increase the force output of the squiggle motors
Bearing surface - low friction material
Second Priority Objectives
Wall thickness/space
Cost
Manufacturability
Longevity - 22 million cycles
Other Constraints and Issues
Decouple the squiggle motors from the bearings
Rotating squiggle motor shaft
No use of magnets
Interferes with Integrated Circuits (IC's) that are being tested
Customers won't like magnets
WOW Design Solution
Getting the design to work within the 52 mm footprint
Increasing the mechanical advantage as much as possible
Be able to incorporate design into an array of testing equipment
8 X 8 array of micro-alignment pieces
Risk Reduction Strategy
A huge portion of our risk reduction for the rest of the quarter will be done using tools such as Solidworks and AutoCAD. Our sponsor considers this a HUGE way to risk reduce for a multitude of reasons. Keith Emery, our sponsor, is willing to look at CAD models as we design them via email/through meetings and consult on what he sees. He will also be able to steer us in the right direction and keep us on the straight and narrow. This will save a ton of time and prevent our group from running into dead ends. Not only will the risk reduction process consist of 3D modeling using software, but it will also incorporate tangible, scaled models. Some high risks areas the risk reduction will discuss are:
Incorporating mechanical advantage with the confines of the project space
Proper placement of squiggle motors within the 4 mm wall
Using the alignment feature to manipulate wall thickness on two of the walls
Friction from possible bearing material
Intermediate Milestones
Some intermediate milestones for the last few weeks of MAE 156A are:
CAD Models
Orientation of Squiggle motors, etc.
Mechanical Advantage Ideas
Pulleys
Levers
Telescoping Screws
Hydraulics
Bearing Material Analysis