SOI technology using buried layers of oxidized porous Si

Abstract
A process to form large defect-free silicon-on-insulator structures on 4-in wafers, without warpage, using a layer of oxidized porous silicon in an n/n+/n structure is presented. CMOS devices have been fabricated in insulated single-crystal silicon islands. Mobilities comparable to bulk silicon have been measured and low-leakage junctions were realized. The advantages and limitations of the process are discussed.

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