Recycling a wafer comprising a buffer layer, after having...

Active solid-state devices (e.g. – transistors – solid-state diode – Housing or package – With contact or lead

Reexamination Certificate

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Details

C257SE21211, C257SE21568, C438S455000, C438S458000, C438S761000

Reexamination Certificate

active

07378729

ABSTRACT:
A donor wafer resulting from a method of recycling the wafer after detaching at least one useful layer. The donor wafer includes a substrate; a buffer structure on the substrate; a protective layer associated with the buffer structure; and a post detachment layer located above the buffer structure and presenting projections or rough portions on its surface. The protective layer prevents removal of the entire buffer structure when the post detachment layer is removed.

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