Semiconductor device and fabrication method thereof
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsKuan-Chi Tsai, Chih-Hsun Lin, Sheng-Wen Su, Shaw-Jang Liou
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Abstract
Semiconductor devices and methods for fabricating the same. The devices includes a substrate, a first etch stop layer, a dielectric layer, an opening, and an anti-diffusion layer. The first etch stop layer overlies the substrate. The dielectric layer overlies the first etch stop layer. The opening extends through the dielectric layer and the first etch stop layer, and exposes parts of the substrate. The anti-diffusion layer overlies at least sidewalls of the opening, preventing contamination molecule diffusion from at least the first etch stop layer, wherein the anti-diffusion layer is respectively denser than the first etch stop layer and the dielectric layer.
Claims11
A fabrication method for a semiconductor device, comprising:
- providing a substrate comprising a first etch stop layer overlying the substrate, a dielectric layer overlying the first etch stop layer, and an opening through the dielectric layer and the first etch stop layer, exposing parts of the substrate, wherein the opening comprises a narrow portion and a wide portion exposing the narrow portion;
- and
- performing plasma treatment on the exposed first etch stop layer and dielectric layer, forming an insulating anti-diffusion layer overlying at least sidewalls of the narrow portion of the opening and overlying the dielectric layer beyond the wide portion of the opening, but not overlying sidewalls of the wide portion of the opening, preventing contamination molecule diffusion from at least the first etch stop layer, wherein the insulating anti-diffusion layer is respectively denser than the first etch stop layer and the dielectric layer.
A fabrication method for a semiconductor device, comprising:
- providing a substrate comprising a first etch stop layer overlying the substrate, a dielectric layer overlying the first etch stop layer, and an opening through the dielectric layer and the first etch stop layer, exposing parts of the substrate;
- and
- performing plasma treatment on the exposed first etch stop layer and dielectric layer, forming an anti-diffusion layer overlying at least sidewalls of the opening, preventing contamination molecule diffusion from at least the first etch stop layer, wherein the anti-diffusion layer is respectively denser than the first etch stop layer and the dielectric layer and wherein the plasma treatment is performed at between approximately 10° C. and room temperature.
Dependencies are inferred from the claim text.