DC & CV Lab. CSIE NTU AOI Automatic Optical Inspection Supports quality control objectives through in-process inspection that identifies critical defects Helps prevent recurrence of critical defects by indicating possible process-related sources of error
DC & CV Lab. CSIE NTU Basic Structure of AOI Platform
DC & CV Lab. CSIE NTU Basic Steps Alignment Observed object moves along the path at constant speed CCD (Charge Coupled Device) cameras scan the object Analyze the image data, calculate the size, position, and the type of the defects on the object Move review cameras to the defect and get the detail
DC & CV Lab. CSIE NTU
DC & CV Lab. CSIE NTU InVision An in-line AOI platform by Orbotech In-line: seamless with the product line
DC & CV Lab. CSIE NTU Spec.
DC & CV Lab. CSIE NTU Standard Features Auto stack comparison Real time classification Video classification system Video image grabbing
DC & CV Lab. CSIE NTU Inspection Methods Periodic area/periodic connector area: comparison of pixel with neighboring pixels Non-periodic connector area: die-to-die
DC & CV Lab. CSIE NTU Illumination Solid-state LED (Light-Emitting Diode)-based system Why LED? Long life and reliability Provides different levels of intensity and evenness of illumination
DC & CV Lab. CSIE NTU Classification Based on a sub-micron-resolution real RGB (Red, Green, Blue) video image Can do go/no-go testing to different channels
DC & CV Lab. CSIE NTU Contactless Transport Mechanism The glass is floated at a stable height on a layer of air above the table, avoiding all backside contact Minimizes contamination, scratching and electrostatic damage Results in much smoother motion than conventional transport mechanisms