Patent ID: 6080642
Filing Date: 2000-06-27
Classification: C23C,C30B,H01L

Abstract:
A method of manufacturing a semiconductor device comprising the deposition of a semiconductor layer on a substrate (1), in which method, within a reactor (10), a number of substrates (1) is placed on a supporting plate (2), heated and exposed to a gas (3) which comprises at least two reactive components from which the semiconductor layer is formed, a first gas flow (4) including a first reactive component being supplied centrally above the supporting plate (2), and, around the first gas flow (4) and isolated therefrom, a second gas flow (5) including a second reactive component being supplied, also from above, so as to be at a larger distance from the supporting plate (2) than the first gas flow (4), whereafter both gas flows (4, 5) flow sideways across the supporting plate (2) covered by the substrates (1), the semiconductor layer being formed on the substrate (1) from the two reactive components, and, subsequently, said gas flows being discharged on the outside of the supporting plate (2), characterized in that the first gas flow is composed of a single gas flow and the second gas flow is composed of (5) n, n being greater than or equal to two, separate gas sub-flows (5A) which each supply 1/n th part of the second gas flow (5) and which are supplied symmetrically with respect to the center of the supporting plate (2), and further characterized in that the gas sub-flows (5A) of the second gas flow (5) are combined before they reach the supporting plate, after which they are subdivided again into a larger number, comprising at least twice as many (2n), of further independent gas sub-flows (5B) which each supply a substantially equal part (1/2/n) of the second gas flow (5).