| CPC H01L 21/67333 (2013.01) [H01L 22/12 (2013.01)] | 20 Claims |

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1. A tray comprising:
a plate comprising a first region and a second region;
a first groove, on the first region of the plate, to which a stub is fixed; and
a second groove, on the second region of the plate, to which a grid holder is fixed,
wherein the stub is configured to store test wafer pieces, and
wherein the grid holder is configured to store a test sample that is formed by cutting the test wafer pieces.
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