Semiconductor Device Dummy Separation Pattern Recessed Region
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Increased integration density in semiconductor devices leads to challenges such as difficulties in layer deposition, reduced uniformity in etching processes, and reliability issues due to decreasing line widths and increasing aspect ratios, which can result in the formation of double stepwise structures during fabrication.
Innovation Solution
A semiconductor device design that includes a semiconductor substrate with a dummy separation pattern having a recessed region, a first electrode, a dielectric layer, and a remaining electrode pattern formed of the same material as the second electrode, which fills the recessed region and penetrates through the interlayered insulating layer, preventing the formation of double stepwise structures during polishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If integration density is increased, then device functionality and capacity are improved, but manufacturing precision and process uniformity deteriorate due to decreased line width and increased aspect ratio
Solution Approach 1:
A dummy separation pattern is formed in advance in the second region before the main electrode formation process. This preliminary structure prevents the formation of double stepwise structures during subsequent polishing operations, ensuring uniform etching and deposition processes across the entire substrate including high-density regions
2Productivity
If line width is decreased to increase integration density, then device capacity is improved, but layer deposition difficulty increases
Solution Approach 1:
The dummy separation pattern is formed preliminarily to establish a proper surface profile before depositing subsequent layers. This prevents double stepwise structure formation that would complicate layer deposition, enabling uniform thin-film deposition even in high-density regions with narrow line widths
Solution Approach 2:
The dummy separation pattern is specifically placed in the second region where it is needed to prevent double stepwise structure formation, while the first region maintains its normal structure for high-density device formation. This localized approach addresses deposition challenges without affecting overall integration density
3Productivity
If aspect ratio is increased to increase integration density, then device capacity is improved, but reliability deteriorates
Solution Approach 1:
The dummy separation pattern is formed in advance to prevent double stepwise structure formation, which creates stress concentrations and reliability issues. By establishing a uniform surface profile beforehand, the structure can accommodate high aspect ratios without compromising device reliability
4Manufacturing precision
If dummy separation pattern is formed with recessed region, then double stepwise structure formation is prevented, but device complexity increases
Solution Approach 1:
The dummy separation pattern with recessed region is formed preliminarily to establish a proper surface profile. This simple preliminary structure prevents complex double stepwise formation during polishing, actually reducing overall process complexity despite the added pattern
Data Source
AI summary
Provided are a semiconductor device and a method of fabricating the same. The semiconductor device may include a semiconductor substrate including a first region and a second region, a dummy separation pattern provided on the second region of the semiconductor substrate to have a recessed region at its upper portion, a first electrode provided on the first region of the semiconductor substrate, a dielectric layer covering the first electrode, a second electrode provided on the dielectric layer, and a remaining electrode pattern provided in the recessed region. The second electrode and the remaining electrode pattern may be formed of a same material.