Patent ID: 8574409

Claim:
A method for controlling a power supply applied to a magnetron sputtering source during deposition of a film on a substrate, comprising: determining a thickness distribution of a film deposited using a power supply applied to the magnetron sputtering source which comprises a periodic modulation having a frequency f which is a harmonic n of an angular frequency w of rotation of a magnet of the magnetron other than the first harmonic, comparing the thickness distribution to the thickness distribution of a reference film of the sputtered material deposited on a substrate without modulation of the power supply, determining an amplitude sensitivity ampSens n and an angular sensitivity angSens n , wherein sens n =ampSens n / ampPow n for the harmonic n, determining the power compensation function PowerCompFunction according to PowerCompFunction=(−amp n /sens n )·cos( n ω t −phase n +angSens n ), where amp n is an amplitude determined from the reference film, phase n is a phase determined from the reference film, and nωt is a product of the harmonic, the angular frequency of rotation, and the time with respect to the power compensation function, respectively, and controlling, via a power supply controller, the power supply applied to the magnetron sputtering source according to the determined power compensation function.