Cell Array and Peripheral Gate Stack Layout for Yield Stability
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Solution Overview
Problem
As semiconductor devices become more integrated, their electrical characteristics and production yields decline, necessitating improvements in both areas.
Innovation Solution
The semiconductor device design includes specific substrate configurations with varying active patterns, gate patterns, and insulating layers to enhance electrical performance and reliability, featuring distinct thicknesses and layer stacking sequences for improved functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If integration density of semiconductor devices is increased, then device functionality and capacity are improved, but electrical characteristics and production yields are reduced
Solution Approach 1:
The patent applies different insulating layer thicknesses to different regions of the semiconductor device. Specifically, the first insulating layer has a first thickness in a first region, while the second insulating layer has a second thickness greater than the first thickness in a second region. This local differentiation allows optimization of electrical characteristics in specific areas without compromising overall integration density, thereby resolving the contradiction between high integration and reliable electrical performance.
2Productivity
If integration density is increased, then more functional elements are packed into the device, but manufacturing precision and yield are reduced
Solution Approach 1:
The patent implements region-specific insulating layer thicknesses where the second insulating layer has greater thickness in a second region compared to the first region. This local quality approach enables differentiated manufacturing precision requirements across different device regions, allowing high integration density while maintaining adequate manufacturing yield through targeted thickness optimization in critical areas.
Data Source
AI summary
A semiconductor device includes a substrate having first and second active patterns therein, which are spaced apart from each other. The first active pattern has a top surface that is elevated relative to a top surface of the second active pattern. A channel semiconductor layer is provided on the top surface of the first active pattern. A first gate pattern is provided, which includes a first insulating pattern, on the channel semiconductor layer. A second gate pattern is provided, which includes a second insulating pattern having a thickness greater than a thickness of the first insulating pattern, on the top surface of the second active pattern.