Patterned Mask Gate Protection in Semiconductor Fabrication
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Solution Overview
Problem
Conventional semiconductor device manufacturing methods result in damaged gates due to differing protection conditions between regions, affecting device performance and yield.
Innovation Solution
A method involving the formation of a patterned mask with a predetermined thickness to selectively expose and protect gates in different regions, ensuring partial consumption of the underlayer to prevent damage during subsequent processes, thereby maintaining gate integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the underlayer is fully removed in the second region to expose the gate, then the gate can be accessed for subsequent processing, but the gate may be damaged during the process
Solution Approach 1:
The patterned mask is formed on the underlayer before removing the underlayer material, establishing a protective framework in advance that prevents gate damage during the subsequent underlayer removal process
Solution Approach 2:
The patterned mask serves as an intermediary protective layer between the underlayer removal process and the gate structure, allowing the underlayer to be removed while the gate remains protected from direct exposure and potential damage
2Ease of manufacture
If the underlayer is partially consumed in the first region to expose part of the gate, then subsequent processing can be performed, but the gate protection is reduced
Solution Approach 1:
The patterned mask is selectively formed only in the first region where partial underlayer consumption is desired, creating different protection levels in different regions: full protection in the second region and partial protection in the first region, matching the different processing requirements
Data Source
AI summary
A method for manufacturing a semiconductor device is provided. A substrate having a first gate and a second gate respectively formed in a first region and a second region is provided. An underlayer is formed on the substrate to cover the first gate in the first region and the second gate in the second region. A patterned mask with a predetermined thickness is formed on the underlayer in the first region. The underlayer corresponding to the second gate in the second region is removed by the patterned mask to expose the second gate, wherein the underlayer corresponding to the first gate in the first region is partially consumed to expose part of the first gate.