摘要:
A plurality of partial control zones (an LL zone, an LR zone, and an R zone) that can control a gas flow rate independently in a widthwise direction of a gas flow are configured on an upstream side of the gas inlet port 20B. A control device 66 is disposed to control a gas flow rate for respective partial control zones. The control device 66 obtains a deviation between a film growth rate and a predetermined target film growth rate at a variety of locations on a wafer 28 based on the data of a thickness of a film that has been formed on the wafer 28 by a rotating film formation carried out while rotating the wafer 28, and controls the respective gas flow rates of the partial control zones by using the rotation film growth sensitivity data 72 that defines a sensitivity to a change in a film growth rate distribution during the rotating film formation on the wafer 28 in such a manner that a change in the respective gas flow rates of the partial control zones causes the deviation at a variety of the locations to be reduced.
摘要:
A susceptor capable of reducing unevenness in a film-thickness of an epitaxial film on an outer surface of a substrate wafer and a manufacturing apparatus of an epitaxial wafer are provided. The susceptor includes a wafer placement and a peripheral portion. The wafer placement is greater in size than the substrate wafer W and substantially disc-shaped. The peripheral portion is substantially in a ring-plate shape and includes: an inner circumference standing in a fashion surrounding a peripheral portion of the wafer placement; and an upper surface outwardly extending from an upper end of the inner circumference in parallel to the placement surface of the wafer placement. In the chemical vapor deposition control unit, an inner circumference has a curvature substantially similar to a curvature of the inner circumference of the peripheral portion, and the upper surface is leveled with the upper surface) of the peripheral portion. The chemical vapor deposition control unit is made of SiO2 which is less reactive with a reaction gas than a SiC film.
摘要:
A reactant gas is supplied to a gas inlet port 40B of a reaction chamber 20A from a plurality of gas flow paths 36A. The number of gas flow paths 36A is five or more within a range of one side of the gas inlet port 40B divided in two at the center thereof. The pitch between adjacent gas flow paths 36A is 10 mm or more. A baffle 38 having a plurality of slit holes 38A is disposed upstream of the gas flow paths 36A. The gas flow rates of the respective gas flow paths 36A are adjusted by recurrent calculation using layer growth sensitivity data that defines the relation between the gas flow rates of the respective gas flow paths 36A.