| 摘要 |
The present invention relates to method of fabricating a (110) oriented silicon substrate and to a method of fabricating a bonded pair of substrates comprising such a (110) oriented silicon substrate. The invention further relates to a silicon substrate with (110) orientation and to a bonded pair of silicon substrates comprising a first silicon substrate with (100) orientation and a second silicon substrate with (110) orientation. It is the object of the present invention to provide methods and substrates of the above mentioned type with a high efficiency wherein the formed (110) substrate has at least near and at its surface virtually no defects. The object is solved by a method of fabricating a silicon substrate with (110) orientation and by a method of fabricating a bonded pair of silicon substrates, comprising the steps of providing a basic silicon substrate with (110) orientation, said basic silicon substrate having a roughness being equal or less than 0.15 nm RMS in a 2×2μm2 or a 10×10μm2 scan, and depositing epitaxially a silicon layer with (110) orientation on the basic silicon substrate at a pressure between 40 Torr to 120 Torr, preferably 80 Torr and at a temperature between about 1000° C. and about 1200° C. and using trichlorosilane or dichlorosilane as silicon precursor gas. |
