Patent ID: 7842355

Claim:
A method of controlling a chemical vapor deposition process, the method comprising: generating a drive signal; providing the drive signal to a direct current power source; generating a pulsed direct current power signal using the direct current power source, wherein a frequency or a pulse-width of the pulsed direct current power signal is modulated in accordance with derived from an amplitude of the drive signal; generating a first plasma having a first density of radicalized species, wherein the first plasma is generated using the pulsed direct current power signal during a first phase of the drive signal; disassociating a first portion of a feedstock gas using the radicalized species in the first density of radicalized species, thereby creating a first deposition material; depositing at least a portion of the first deposition material on a substrate, thereby forming a first layer; generating a second plasma having a second density of radicalized species, wherein the second plasma is generated using the pulsed direct current power signal during a second phase of the drive signal, the first phase of the drive signal being modulated differently than the second phase of the drive signal; disassociating a second portion of the feedstock gas using the radicalized species in the second density of radicalized species, thereby creating a second deposition material; and depositing at least a portion of the second deposition material on the first layer, thereby forming a second layer.