Bonding Pad Extension Pattern for Semiconductor Warpage Compensation
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Solution Overview
Problem
Existing semiconductor devices face challenges in enhancing data storage capacity and reliability due to warpage issues and complexity in manufacturing processes.
Innovation Solution
The introduction of an extension pattern on a dummy structure within the bonding semiconductor device, which reduces or compensates for warpage by adjusting material, volume, width, thickness, shape, and position, allowing for precise control during the etching process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bonding semiconductor device is constructed with conventional structures, then the device can be manufactured with standard processes, but warpage occurs during bonding which reduces reliability
Solution Approach 1:
The extension pattern is formed in advance during the semiconductor device manufacturing process, before the bonding operation. This preliminary formation of the extension pattern allows it to pre-compensate for warpage that would occur during bonding, thereby improving bonding reliability without requiring additional warpage correction steps later in the process
Solution Approach 2:
The extension pattern modifies the physical parameters of the bonding structure by adding an additional pattern element with specific dimensions and material properties. By adjusting the width, thickness, and material composition of the extension pattern, the stress distribution during bonding is changed to compensate for warpage and improve bonding reliability
2Reliability
If warpage compensation structures are added to the bonding portion, then reliability is improved, but the device complexity increases
Solution Approach 1:
The extension pattern serves multiple functions simultaneously: it acts as a structural element for warpage compensation, provides stress control during bonding, and can be integrated with existing bonding portion structures. This multi-functionality allows reliability improvement without proportionally increasing device complexity
Solution Approach 2:
The extension pattern is applied locally at specific positions within the bonding portion where warpage compensation is most needed, rather than uniformly across the entire device. This localized application targets the specific problem areas while minimizing the overall increase in device complexity
3Manufacturing precision
If the extension pattern is formed with precise dimensions and materials, then warpage control is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The formation of the extension pattern is merged with existing manufacturing processes such as etching, deposition, or lithography steps that are already part of the semiconductor device fabrication sequence. By combining the extension pattern formation with these existing processes, precise dimensional control is achieved without adding separate manufacturing steps that would increase process complexity
Data Source
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AI summary
A semiconductor chip (100, 200) for a bonding semiconductor device (10) includes a substrate (110, 210), a wiring portion (180, 280) on the substrate (110, 210), and a bonding portion (190, 290) on the wiring portion (180, 280). The bonding portion (190, 290) includes an insulation layer (192, 292), a bonding structure (194, 294), and an extension pattern (198, 298). The bonding structure (194, 294) includes a pad structure (195, 295) passing through the insulation layer (192, 292) and a dummy structure (196, 296) passing through a partial portion of the insulation layer (192, 292). The extension pattern (198, 298) is at a lower portion of the dummy structure (196, 296) that is adjacent to the wiring portion (180, 280) and includes an extension portion (198a) extending in one direction in a plan view.