Method and structures for indexing dice

Details Method and structures for indexing dice Method and structures for indexing dice

2011-01-11

2011-01-11

Potter, Roy K (Department: 2822)

Active solid-state devices (e.g., transistors, solid-state diode

Alignment marks

C257S758000, C257SE23179

Reexamination Certificate

active

07868474

ABSTRACT:
A method of indexing a plurality of dice obtained from a material wafer comprising a plurality of stacked material layers, each die being obtained in a respective die position in the wafer, the method including providing a visible index on each die indicative of the respective die position, wherein providing the visible index on each die includes: forming in a first material layer of the die a reference structure adapted to defining a mapping of the wafer; and forming in a second material layer of the die a marker associated with the reference structure, a position of the marker with respect to the reference structure being adapted to provide an indication of the die position in the wafer.

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