Uniform distribution of reactants in a device layer
First Claim
1. In device fabrication, a method for forming a multi-constituent device layer on a wafer surface, the device layer comprising first and second constituents is being formed in a reaction chamber comprising a susceptor capable of supporting at least one wafer and alternating first and second segments, the method comprising:
- providing at least one wafer on the susceptor;
rotating the susceptor;
flowing a first chemistry comprising the first constituent into the first segments of the reaction chamber;
flowing a second chemistry comprising the second constituent into the second segments of the reaction chamber; and
wherein the first segments comprise an area that is greater than an area of the second segments by an amount sufficient to effectively reduce a diffusion path of the first constituent to result in a more uniform distribution of the first constituent within the layer.
8 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for forming a multi-constituent device layer on a wafer surface are disclosed. The multi-constituent device layer is formed by flowing a first chemistry comprising a first constituent and a second chemistry comprising a second constituent via a segmented delivery system into a reaction chamber. The reaction chamber comprises a susceptor for supporting and rotating the wafers. The segmented delivery system comprises alternating first and second segments into which the first and second chemistries, respectively, are flowed. The first segments comprise an area that is greater than an area of the second segments by an amount sufficient to effectively reduce the diffusion path of the first constituent. Reducing the diffusion path of the first constituent results in a more uniform distribution of the first constituent within the device layer.
237 Citations
28 Claims
-
1. In device fabrication, a method for forming a multi-constituent device layer on a wafer surface, the device layer comprising first and second constituents is being formed in a reaction chamber comprising a susceptor capable of supporting at least one wafer and alternating first and second segments, the method comprising:
-
providing at least one wafer on the susceptor; rotating the susceptor; flowing a first chemistry comprising the first constituent into the first segments of the reaction chamber; flowing a second chemistry comprising the second constituent into the second segments of the reaction chamber; and wherein the first segments comprise an area that is greater than an area of the second segments by an amount sufficient to effectively reduce a diffusion path of the first constituent to result in a more uniform distribution of the first constituent within the layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
Specification