Thin film forming method

Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating

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20419215, 20419217, C23C 1434

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active

055408206

ABSTRACT:
A method of forming a thin film by a bias sputtering method using a first target made of a refractory metal mainly composed of W and a second target made of a conductive material mainly composed of a low-melting-point metal which comprises, upon sputtering the first target made of the refractory metal mainly composed of W, decreasing high energy particles incident to a substrate in a state where a desired bias voltage is applied to a substrate thereby forming a thin film of the refractory metal mainly composed of W with low resistivity and less stress and, subsequently, upon sputtering the second target made of the conductive material mainly composed of the low-melting-point metal, accelerating the growth of crystals in a state where a desired voltage is applied to a substrate thereby forming in lamination a thin film of the conductive material mainly composed of the low-melting-point metal with a large crystal grain size on the thin film made of the refractory metal mainly composed of W.

REFERENCES:
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patent: 3515663 (1970-06-01), Bodway
patent: 4468437 (1984-08-01), Patten et al.
patent: 4710398 (1987-12-01), Homma et al.
patent: 4756810 (1988-07-01), Lamont, Jr. et al.
patent: 4785962 (1988-11-01), Toshima
patent: 4816126 (1989-03-01), Kamoshida et al.
patent: 4851101 (1989-07-01), Hutchinson
Journal of Applied Physics, vol. 16, #1, "Thin Films Deposited by Bias Sputtering"--Maissel and Schaible.
Applied Surface Science 38 (1989) 295-303 "Stresses in Sputtered Tungsten Thin Films", CNRS, Laboratoire de Microstructure et de Microelectronique.

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