Semiconductor Pattern Transfer for Multi-Height Structure Fabrication
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Solution Overview
Problem
The complexity of manufacturing and integration in semiconductor devices leads to inefficiencies, necessitating improved methods for creating semiconductor device structures with varying patterns and heights.
Innovation Solution
A method involving the formation of a target layer and an energy-sensitive layer over a semiconductor substrate, where different energy treating processes create treated portions of varying heights, which are then transferred into the target layer or substrate to form openings of different depths, allowing for reduced fabrication costs and increased design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional manufacturing processes are used for semiconductor devices, then manufacturing precision can be maintained, but device complexity and fabrication time increase significantly
Solution Approach 1:
The manufacturing process is segmented into distinct stages: forming the energy-sensitive layer with patterns of different heights, selectively removing portions to create openings, and transferring these openings into the target layer. This segmentation allows complex 3D structures to be created through simpler sequential steps rather than attempting to create all features simultaneously, thereby reducing manufacturing complexity while maintaining precision.
Solution Approach 2:
The patent introduces vertical dimensionality by creating patterns with different heights in the energy-sensitive layer. By utilizing height variations (first height and second height) in addition to planar patterns, the method enables formation of openings at different depths into the target layer through a single pattern transfer process, reducing the number of fabrication steps required compared to conventional planar-only approaches.
2Manufacturing precision
If multiple fabrication steps are implemented to create patterns with different heights, then manufacturing precision improves, but fabrication time and costs increase
Solution Approach 1:
The patent merges the formation of multiple openings at different depths into a single pattern transfer operation. By creating the energy-sensitive layer with integrated height variations and transferring all openings simultaneously in one step, the method combines what would traditionally require multiple separate etching and masking operations into a unified process, thereby improving fabrication efficiency while maintaining precise control over opening depths.
Solution Approach 2:
The energy-sensitive layer is prepared in advance with pre-defined height variations and pattern configurations before the final transfer step. This preliminary structuring of the energy-sensitive layer allows subsequent opening formation to proceed efficiently without requiring intermediate adjustments or additional fabrication steps, thus improving overall productivity while ensuring precise pattern transfer.
3Adaptability or versatility
If conventional pattern transferring processes are used, then manufacturing costs are controlled, but design flexibility for varying pattern heights is limited
Solution Approach 1:
The patent utilizes changes in the physical parameter of height within the energy-sensitive layer to achieve design flexibility. By varying the height parameter (first height versus second height) during energy-sensitive layer formation, the method enables creation of openings at different depths into the target layer using the same pattern transfer process, thereby enhancing design versatility without complicating the manufacturing approach.
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
This approach enables the creation of semiconductor device structures with varying heights using the same pattern transferring process, reducing fabrication time and costs while enhancing design flexibility.
Implementation Method 1
the first energy treating process and the second energy treating process are electron-beam (e-beam) writing processes
Implementation Method 2
the energy-sensitive layer includes a cross-linking compound having a cross-linking functional group
Data Source
AI summary
A method for preparing a semiconductor device structure includes forming a target layer over a semiconductor substrate, and forming an energy-sensitive layer over the target layer. The method also includes performing a first energy treating process to form a first treated portion in the energy-sensitive layer, and performing a second energy treating process to form a second treated portion in the energy-sensitive layer. The method further includes removing the first treated portion and the second treated portion to form a first opening and a second opening in the energy-sensitive layer, and transferring the first opening and the second opening into the target layer.