Fabrication of Miniature Implantable Medical Devices through Mechanical MicroManufacturing

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Fabrication of Miniature Implantable Medical
Devices through Mechanical Micro-Manufacturing
Sinan Filiz, Mechanical Eng. Dept., Multi-Scale
Manufacturing and Dynamics Laboratory, Advisor
Prof. Burak Ozdoganlar
Objectives and Tasks

• Feasibility assessment
• Micro-machining experiments on biocompatible
  materials, including TiAl4V, PEEK, fibrin, and
  PLA, stainless steel, titanium alloys.
• Process capability
• Machining 2D, 3D shapes (pockets, channels,
  walls) with various sizes
• Productivity
• Process characterization
• Relationships between operational conditions
  (feed, speed, depth of cut) and quality metrics
  (dimensional accuracy and surface finish) for
  biocompatible materials
• Preferred operational conditions
• Dynamic modeling and measurements
• Vibration control for precision
• Tissue tests of manufactured implants

Preliminary Work
The Miniature Machine Tool (mMT)
3-axis (10 nm resolution) Precision Slides
Microscope
160000 rpm Spindle
An 160µm Acrylic Micro-Barb
Micro-Velcro on PMMA (Acrylic)
Micro Endmill
Speed Measurement
Kistler Miniature Force Dynamometer
Fibrin (Bio-compatible)
304 Stainless Steel (Bio-compatible)
Polylactic Acid (Bio-absorbable)
Workpiece