Semiconductor Insulating Segments Prevent Capacitor Collapse
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Solution Overview
Problem
The scaling down of semiconductor devices poses challenges in achieving improved quality, yield, and reliability due to issues such as capacitor structure collapse during fabrication processes.
Innovation Solution
A method involving the formation of selectively positioned insulating segments on undoped segments within a semiconductor device, using chemical vapor deposition in the presence of ozone and tetraethyloxysilane, to provide support for capacitor structures and prevent collapse during subsequent processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If capacitor structures are formed in scaled-down semiconductor devices, then device computing ability is improved, but capacitor structures collapse during fabrication processes
Solution Approach 1:
The base film is segmented into alternating doped and undoped regions, creating a patterned structure where insulating segments are selectively formed only on undoped regions. This segmentation provides localized support to capacitor structures, preventing collapse while maintaining device scaling benefits
Solution Approach 2:
Insulating segments act as intermediary support structures between the base film and capacitor structures. These insulating segments are selectively formed on undoped regions to provide mechanical support during fabrication, preventing capacitor collapse without interfering with the electrical functionality of the scaled-down device
2Reliability
If selective insulating segments are formed on undoped segments, then capacitor structure support is improved, but fabrication process complexity increases
Solution Approach 1:
Different regions of the base film are given different properties: doped regions provide electrical functionality while undoped regions provide mechanical support for insulating segments. The insulating segments are selectively formed only on undoped regions, creating local quality differentiation that supports capacitor structures without requiring complex global process changes
Solution Approach 2:
The base film is pre-patterned with alternating doped and undoped regions before capacitor formation. This preliminary action creates the support structure framework in advance, allowing insulating segments to be selectively formed later without requiring complex real-time adjustments during capacitor fabrication
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The selectively formed insulating segments effectively support capacitor structures, preventing collapse and ensuring the integrity of semiconductor devices during etching, chemical mechanical polishing, and packaging processes, thereby enhancing the quality and reliability of semiconductor devices.
Implementation Method 1
forming a plurality of insulating segments on the plurality of undoped segments, wherein the plurality of insulating segments are formed by chemical vapor deposition in the presence of ozone and tetraethyloxysilane
Implementation Method 2
implanting the growing base film from above, wherein the plurality of doped segments comprise nitrogen
Data Source
AI summary
The present application discloses a method for fabricating a semiconductor device including providing a substrate, forming a growing base film above the substrate, forming a plurality of doped segments and a plurality of undoped segments in the growing base film, selectively forming a plurality of insulating segments on the plurality of undoped segments, removing the plurality of doped segments, and forming a plurality of capacitor structures above the substrate.