Michael Weber SAIC Intern Purdue Technology Center August 10, 2010.
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The Road to Tin Whisker Detection
Michael WeberSAIC Intern
Purdue Technology CenterAugust 10, 2010
Fisher Scientific Micromaster Microscope
Canon G10 Camera USB Digital Microscope Fiber-Optic Light Source • 360 Ring lamp• Bifurcated light guide
7 In. Tile Wet Saw Hand Dremel tool
Previous Equipment
Fisher XDAL X-ray Fluorescence Spectrometer
• Perform elemental analysis of samples; returns weight percent of elements
• Design programs to calculate thickness of layers
• Automated arrays of inspection points• Generate tabular and graphical results
New Equipment, cont’d
New Equipment, cont’d
Nibbler• Designed for soft sheet metal• Cuts boards well but poor maneuverability
New Equipment
Diamond Tech DL3000 XL Band Saw• Variable speed, diamond-tipped blade• Integrated water pump with filters
New Equipment, cont’d
Hitachi TM-1000 Tabletop SEM
• 20x – 10,000x magnification; 15 kV voltage
• 70 mm maximum specimen size• Integrated software for all image
manipulation, capture, editing• Acrylic enclosure with filter-fed air for
clean environment
New Equipment, cont’d
New Equipment, cont’d
New Equipment, cont’d
Well-documented data base of inventory; backlog of parts still needed to be examined
Instruments with sufficient capabilities for elemental analysis, cutting, and inspection
Developed routine for inspection (Logging, XRF, component extraction, SEM)
Conclusions
Continue to search for parts; need a more reliable Pb-free source
Refine methods; namely a method to clean debris from boards without removing whiskers
Continue examination with possible acceleration of commercial whiskers
Path Forward
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