Patent ID: 8704306

Claim:
A strained Ge-on-insulator structure, comprising: a silicon substrate, wherein an oxide insulating layer is formed on a surface of the silicon substrate; a Ge layer formed on the oxide insulating layer, wherein a first passivation layer is formed between the Ge layer and the oxide insulating layer, and the first passivation layer is a strontium germanide layer or a barium germanide layer; a gate stack formed on the Ge layer; and a channel region formed below the gate stack, and a source and a drain formed on sides of the channel region, wherein the source and the drain are a Si x Ge 1-x :C source and a Si x Ge 1-x :C drain respectively to produce a tensile strain in the channel region, in which x is within a range from 0 to 1 and a content of C is within a range from 0 to 7.5%.