Hybrid Bonding Layout With Non-Uniform Pattern Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing semiconductor devices face challenges in achieving uniform pattern density for hybrid bonding, leading to potential patterning errors, mechanical weaknesses, and reduced bonding strength, which affect the yield and reliability of bonded semiconductor structures.
Innovation Solution
The introduction of a non-uniform pattern density in semiconductor devices, incorporating active and inactive bonding structures with varying densities and configurations, to stabilize the bonding interface and enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform pattern density is used in bonding region, then manufacturing process is simple, but patterning errors occur and bonding strength is reduced
Solution Approach 1:
The patent applies local quality by creating different pattern densities in different regions of the bonding interface. The bonding region is divided into multiple areas with varying pattern densities - higher density in some regions and lower density in others - to match the non-uniform antenna ratios of adjacent bonding structures. This localized adaptation prevents patterning errors while maintaining manufacturing feasibility.
2Device complexity
If uniform pattern density is used in bonding region, then device structure is simple, but bonding strength and reliability are reduced
Solution Approach 1:
The patent implements local quality by tailoring the pattern density to the specific requirements of each bonding area. By analyzing the antenna ratio variations across the bonding interface and adjusting pattern density accordingly, the design achieves optimal bonding strength and reliability in each region while maintaining overall structural coherence.
Solution Approach 2:
The patent applies parameter changes by systematically varying the pattern density parameter across different bonding regions. The pattern density is adjusted as a continuous or discrete parameter to match the antenna ratio profile, transforming a uniform structure into a graded structure that optimizes bonding performance without excessive complexity.
3Reliability
If pattern density varies to match antenna ratio, then bonding strength improves, but manufacturing complexity increases
Solution Approach 1:
The patent manages manufacturing complexity by treating pattern density as a controllable parameter that can be adjusted through standard fabrication process modifications. The variation in pattern density is achieved through controlled changes in lithography exposure, etch conditions, or deposition parameters, which are within the capability of existing manufacturing processes.
Data Source
AI summary
The embodiments herein relate to semiconductor devices having a non-uniform pattern density for hybrid bonding. A semiconductor structure is provided. The semiconductor structure may include a semiconductor device having a substrate, a device region over the substrate, a bonding region over the device region, and a plurality of bonding structures in the bonding region. The bonding region may include a first bonding area having a first pattern density, a second bonding area having a second pattern density adjacent to the first bonding area, and a third bonding area having a third pattern density adjacent to the second bonding area. The plurality of bonding structures in the bonding region may include a first bonding structure in the first bonding area, a second bonding structure in the second bonding area, and a third bonding structure in the third bonding area.