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Engineering Experiences Luther Nieh
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Engineering Experiences Luther Nieh

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Luther Nieh\'s experiences and sample projects

Luther Nieh\'s experiences and sample projects

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Engineering Experiences Luther Nieh Engineering Experiences Luther Nieh Presentation Transcript

  • Engineering Experiences Luther Nieh
  • What Makes A Good Engineer
    • Responds to requirement and input
    • Defines scope of work
    • Shares knowledge & deliver expertise
    • Brings clarity to a complex problem
    • Solves challenging problems
    • Does a good layout
    • Checks his/her own design
    • Delivers solutions
  • Engineering Design Methodology
    • Marketing Requirement Document
    • Product Requirement Specifications
    • System Functional Block Diagram
    • Subsystem Description and Analysis
    • Engineering Specifications
  • System Design
    • Process requirements
    • Schematics & Block Diagrams
    • Brain storm and tradeoffs
    • Mechanical subsystems
    • Modeling analysis
    • Electrical subsystems
    • Computer software and firmware
  • Mechanical Engineering and Design
    • Select principal components
    • Initial layout
    • Mechanical structures
    • Mechanisms
    • Instrumentations
    • Electrical packaging and cabling
    • Enclosure
    • User Interface
  • Turning It Into A Product
    • Alignment and Test plan
    • Services – gases, vacuum, pneumatics, power, ventilation
    • Ergonomics, Health and Safety
    • Regulatory – UL, CE, CSA, FCC
    • Product Packaging
    • Trouble shooting guide
    • Installation and Service Manuel
    • User training
    • Spares and backups
  • AccuScribe Wafer Scriber
    • Produce high brightness LED chips
    • 2” sapphire wafers (20,000 dies)
    • 1 to 3 wafers per hour
    • Small solid state laser
    • Small 2” X-Y-Theta stages
    • Small platform 15” x 24” x 48”
    • ~$230K
  • Next Gen AccuScribe System
    • 2” to 4” sapphire wafers
    • 8 to 12 wafers per hour
    • Lightwave Electronics Laser
    • 8” X-Y-Theta stages
    • Large Platform 24” x 36” x 64”
    • ~$650K
  • System Engineering
    • Laser Selection
    • X-Y-Theta Stage Selection
    • Granite platform design
    • Laser bean delivery system
    • Software/firmware
    • User Interface
    • Large Platform 24” x 36” x 64”
    • ~$650K
  • Optical Platform Block Diagram
  • Optical Platform Realized
  • Optical Platform Design - 1
    • Laser power attenuator
    • Power detector
    • Laser beam collimator
    • Laser beam shutter
    • LED light sources
    • Wafer edge detector
    • Z focusing stage
    • UV Laser objective lens
    • Camera for UV beam
  • Optical Platform Design - 2
    • Visible light objective lens
    • Camera for visible beam
    • Alignment HeNe laser
    • Alignment targets
    • Turning mirrors
    • Beam Splitters
    • AutoFocus compensator
    • Debris removal
    • Light tight box
  • Optical Disk Drive Library System
    • High Capacity 500 to 1000 cartridges
    • Access any location <.8 sec
    • >1,000,000 exchanges/year
  • Library System Sub-systems
    • Back to back back-planes – 9 rows x 6 columns
    • 5 axes mechanisms – X, Y, 2X Z fingers, Theta
    • Mailbox mechanism 2X
    • Transfer Mechanisms
    • Computer card cages
    • Alignment modules
    • Power supplies & cables
    • Air filters and blower
    • Enclosure
  • Therma-Probe 3000 Metrology Tool
  • Therma-Probe 300 Metrology Tool Statement of works
  • Therma-Probe 300 Metrology Tool Deliverables
  • High Throughput Strip Tool
    • Wide temperature wafer pedestal design
    • Pedestal lift design
    • Reliability improvements
    • Sensors improvements
    • Vacuum window FA
    • Vacuum slit Valve
    • Top chamber lift cost reduction
  • In Tool Laser Beam Profiler
    • In tool examination of Laser Beam profiles
    • Used it to align 8 parallel laser beams to correct spacing
    • Reduce tool maintenance time
    • Improve tool and process line availability
    • Improved PV Panel Power output
  • Bus Bar Tape Centering Test Bed
    • Bring bus bar tape from supply spool to within spec position at the bus bar welder head
    • Used waist pins and guide rollers to gradually remove bus bar tape offset & twist
    • Incorporates tape tension sensor feedback
    • After alignment, provides automatic tape centering
    • Reduce tape breakage
  • Rational Manager
    • Systematic Problem Solving Failure Mode and Effects Analysis
    • Decision Analysis
    • Project Planning
  • What I have learned from Engineering
    • Use Visible tools to communicate and execute design – block diagram, drawing tree, BOM, pictures, screen shots, Gantt charts
    • Leverage existing hardware & tools to collect performance data to refine & complete design
    • Think
    • Ask Questions
    • Work with smart people
  • What Makes A Good Manager
    • Has Vision
    • Has the ability to lead
    • Manages people to become more successful
    • Identifies and creates new opportunities
    • Improves key processes
    • Develops resources
    • Grows a business
  • Thank You for Your Time