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3.1

Lot Definition

3.2

Wafer identification

Lot Definition

A definite quantity of wafers from the same diffusion batch produced under presumed uniform conditions.

Occasionally a lot equals 25 wafers.

Each wafer is marked with laser marking to identify the wafer. The wafer map file is linked to the wafer

identification. There are two marks on the wafer.

The following figure shows the position of the wafer identification codes. The reference die is the black

marked die in the corner at the right lower position of the wafer.

Figure 3-1. Position of Wafer Identification Code

18

Shipping, Packing & Further Handling

SCBU045 (11-09-21-065) – October 2007

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