Joining, electronics & semiconductor

Wafer defect map & binning

Detect, locate, size, and bin defects across a wafer into a spatial map.

Modalities:Wafer scanOptical inspectionSEM review
Processed 150 mm silicon wafer with a grid of dies and ink-marked defective dies
312
Defects
6
Classes
flagged
Edge cluster

Example outputs shown for illustration. Numbers depend on your samples and protocol.

Image: Phiarc, CC BY-SA 4.0 via Wikimedia Commons

What you get

Defect count
Wafer map
Defect class bins
Size distribution
Cluster / signature flags

The measurement, today

Defects are reviewed one image at a time and tallied on a sheet. Spatial signatures such as edge rings, radial scratches, and cluster hot spots only emerge when someone plots them by hand.

What it costs

The pattern of defects across a wafer points at the tool that caused them. Without a fast map, a drifting chamber keeps printing scrap while review works through a backlog.

From image to reviewed result

  1. 1

    Scan the wafer

    Tile optical or SEM images across the wafer surface.

  2. 2

    Detect and size

    Every defect is segmented, located, and measured.

  3. 3

    Bin by class

    Defects are sorted into classes such as particle, scratch, and pattern defect.

  4. 4

    Map and flag

    Defects are plotted to wafer coordinates and spatial signatures are flagged.

Scope: Detects and classifies defects visible in the images provided. Killer-versus-nuisance calls depend on your device rules and should be confirmed against electrical test.

Send a sample image and a measurement goal

We will show the closest ConductVision workflow and flag what needs custom validation for your images.