Dummy Conductor Semiconductor Packaging for Precise Bond Alignment
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Solution Overview
Problem
Existing semiconductor packaging technologies face challenges in achieving precise alignment and mechanical strength during bonding processes, leading to issues with signal integrity and noise reduction.
Innovation Solution
Incorporation of a floated or grounded dummy conductor in the semiconductor device, which creates a controlled topology variation with connecting terminals, allowing for better process control and enhanced mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional bonding processes are used without dummy conductors, then the manufacturing process is simpler, but alignment precision and mechanical strength deteriorate
Solution Approach 1:
The dummy conductor is formed in advance on the substrate before the actual bonding process. This preliminary structure provides pre-established alignment references and mechanical support, enabling precise positioning of subsequent bonding operations without requiring complex real-time alignment systems.
Solution Approach 2:
The dummy conductor acts as an intermediary element between the substrate and the device being bonded. It provides a stable reference structure that mediates the alignment process and distributes mechanical stresses, improving both positioning accuracy and bonding strength without directly participating in the electrical function.
2Strength
If larger critical dimensions are used in bonding structures, then mechanical strength is improved, but the device size increases and integration density decreases
Solution Approach 1:
The bonding structure is segmented into multiple components: the dummy conductor, the actual bonding pads, and supporting dielectric structures. This segmentation allows each component to be optimized independently - the dummy conductor provides mechanical strength while the actual bonding pads maintain minimal size for high density integration.
Solution Approach 2:
Different regions of the structure have different properties optimized for their specific functions. The dummy conductor region has larger dimensions for mechanical strength, while the active bonding regions maintain small critical dimensions for high integration density. This local differentiation resolves the contradiction between strength and size.
3Volume of moving object
If bonding structures are minimized for high density integration, then device size is reduced, but mechanical strength and alignment precision deteriorate
Solution Approach 1:
The dummy conductor serves as a mediator that provides mechanical strength and alignment reference without occupying active bonding space. It enables the actual bonding structures to be minimized for high density while the dummy structures provide the necessary mechanical support and positioning accuracy.
4Reliability
If conventional bonding without topology control is used, then manufacturing is simpler, but signal integrity and noise reduction deteriorate
Solution Approach 1:
The topology of the conductor structures is deliberately changed and controlled during the manufacturing process. By adjusting the shape, size, and arrangement of dummy conductors and bonding pads, the electrical characteristics such as signal integrity and noise performance are optimized while maintaining a relatively simple manufacturing process.
Data Source
AI summary
A semiconductor device including an integrated circuit, a dielectric layer, a plurality of connecting terminals and at least one dummy conductor is provided. The integrated circuit has a plurality of connecting pads, and the dielectric layer is disposed thereon and partially exposes the plurality of the connecting pads by a plurality of openings defined therein. The plurality of the connecting terminals is disposed on the plurality of the connecting pads exposed by the plurality of the openings. The at least one dummy conductor is disposed on the dielectric layer and electrically isolated from the integrated circuit. A substantial topology variation is between the plurality of the connecting terminals and the at least one dummy conductor. A semiconductor package having the semiconductor device is also provided.