I think the answer depends on what type of wafer map you're looking for. The script that Ian@JMP linked seems to be a good option for parametric wafer maps.
If you're looking to build a bin classification wafer map, then the built-in platform that I've found to be most useful is Bubble Plot. A few tips when using Bubble Plot to make wafer maps:
- Change shape to square for a more "die-like" appearance
- Use Column Properties to set standard properties:
- X/Y orientation with Value Ordering
- Bin Colors with Value Colors
- Label is whatever classification you want to show, such as a bin number
I've also managed to create some interesting - what I've termed - Hyper-heat maps. By creating custom maps to represent sub-die structures, you can then use Graph Builder to make X-Y arranged wafer maps of these heat maps, i.e. a hyper-heat map. For complex SOCs, this can be a powerful visualization technique.
And, as always, nearly anything is possible using custom-built JSL scripts.