Patent ID: 9595438
Date: 2017-03-14
CPC Classifications: C30B,H01L

Claim:
1. A method for producing a monolithic template comprising a Si wafer with a layer of a III/V semiconductor epitaxially applied on a surface of the Si wafer, the III/V semiconductor having a lattice constant, which differs by less than 10% from that of Si, comprising: epitaxially growing a Si layer on the surface of the Si wafer at a wafer temperature from 600 to 1200° C., a growth rate 0.01-20 μm/h, and a thickness of the Si layer up to 5 μm; after growing the Si layer and before precipitation of III/V semiconductor on the Si layer, preparing a surface of the Si layer by conducting an active Cl-containing gas over a surface of the Si layer at a wafer temperature from 600 to 1,200° C. for a time up to 60 min for etching the Si layer at an etching rate up to 5 μm/h to form double-layer stepped Si terraces that minimize formation of anti-phase defects between the Si layer and subsequently formed III/V semiconductor material; epitaxially growing a first layer of the III/V semiconductor on the surface of the Si layer at a wafer temperature from 350 to 650° C., a growth rate from 0.1 to 2 μm/h, and a layer thickness of the first layer of the III/V semiconductor from 1 to 100 nm; and epitaxially growing on the surface of the first layer of the III/V semiconductor a second layer of a III/V semiconductor, identical to or different from the first layer of the III/V semiconductor at a wafer temperature from 500 to 800° C., a growth rate from 0.1 to 10 μm/h, and a layer thickness of the second layer of the III/V semiconductor from 10 to 150 nm; the epitaxially growing the first and second layers of III/V semiconductor performed subsequent to the preparation of the surface of the Si layer, and the epitaxially growing the second layer of III/V semiconductor performed subsequent to the epitaxially growing the first layer of III/V semiconductor and performed at a higher temperature than the epitaxially growing the first layer of III/V semiconductor.