November 17, 2020
We were provided this sample map file said to be a .vik wafer map. Further investigation showed it to be a binary file created by a company called Viking Semiconductor Equipement. Viking manufactured (among other things) KGD pick and place equipment in the 1990s.
It appears that some other companies in that field also adopted the Viking wafer map format. This includes Zevatech, ESEC and possibly Royce.
The file is broken up into two distinct sections:
The table below summarizes the parameters found in the header:
| Description | Notes |
|---|---|
| Date Code | The date and some additional info (ASCII) |
| Tester ID | ID of the testing machine (ASCII) |
| Lot ID | wafer lot ID - should include wafer number |
| # of Ref Device | may be none present max=16 |
| Ref1 X position | may be none present |
| Ref1 Y position | may be none present |
| Ref2 X position | may be none present |
| Ref2 Y position | may be none present |
| Ref16 X position | may be none present |
| Ref16 Y position | may be none present |
| Units of Measure | typically microns |
| Step Size X | |
| Step Size Y | |
| Column Count | |
| Row Count | |
| Null Bin | |
| Pick Die Count | |
| # Process Bins | |
| Process Bin Code | |
| Process Bin Qty | |
| Map Format | default is 2D array |
| LL Origin | quadrant |
| Flat Orientation | |
| Frame Orientation | |
| Process Status | ASCII |