Patent ID: 8652573

Claim:
A method of depositing a film having a substantially uniform thickness by means of chemical vapor deposition (CVD), comprising: providing a reaction chamber; providing a substrate in said reaction chamber; subjecting the substrate to a series of deposition cycles, wherein each deposition cycle includes the steps of: (a) during a first time interval, supplying a first reactant to the reaction chamber; (b) during a second time interval, supplying a second reactant to the reaction chamber; and (c) during a third time interval, supplying neither the first nor the second reactant to the reaction chamber; wherein a start of the second time interval lies within the first time interval, such that a pre-exposure interval exists between a start of the first time interval and the start of the second time interval, during which pre-exposure interval the first reactant is supplied to the reaction chamber while the second reactant is not supplied to the reaction chamber, and wherein an end of the second time interval either coincides with the end of the first time interval or occurs after the end of the first time interval.