Semiconductor Package Buffer Structure for Ionization Control
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Solution Overview
Problem
Existing semiconductor packages face challenges in achieving miniaturization, improved bending characteristics, and enhanced heat dissipation and electrical performance, particularly in integrating multiple components into a single package.
Innovation Solution
Incorporating a buffer structure with a metal material having a different ionization tendency than the conductive wiring and wiring patterns, which controls ionization during the manufacturing process and enhances electrical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If components are integrated into a single semiconductor package to achieve miniaturization, then the size and weight of electronic components are reduced, but the electrical characteristics and reliability deteriorate due to ionization issues
Solution Approach 1:
A buffer structure comprising a buffer layer and buffer electrode is introduced between the conductive wiring and terminal pads. The buffer layer has different ionization characteristics than the conductive wiring, serving as an intermediary that prevents harmful ionization during soldering processes while maintaining electrical connectivity. This mediator structure resolves the contradiction by protecting the electrical characteristics during miniaturized package integration.
Solution Approach 2:
The buffer structure uses composite material composition where the buffer layer is made of a material with different ionization tendency compared to the conductive wiring material. This composite approach allows the package to maintain both miniaturization benefits and reliable electrical characteristics by combining materials with complementary properties.
2Temperature
If multiple components are integrated into one package to improve heat dissipation, then thermal management is enhanced, but manufacturing complexity increases
Solution Approach 1:
The terminal pad structure is segmented into multiple functional layers: terminal pad, buffer layer, and buffer electrode. This segmentation allows each layer to perform its specific function (electrical connection, ionization control, structural support) independently, simplifying the manufacturing process for integrated packages with enhanced heat dissipation capabilities.
3Reliability
If the buffer structure is placed between outermost terminal pads to control ionization, then electrical characteristics are improved, but the device complexity increases
Solution Approach 1:
The buffer structure is selectively applied only between outermost terminal pads where ionization issues occur, rather than throughout the entire package. This localized approach improves electrical characteristics where needed while minimizing the increase in overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The buffer structure improves the electrical performance of semiconductor packages by managing ionization, allowing for better integration and miniaturization of components while maintaining effective heat dissipation.
Implementation Method 1
The buffer structure includes a first material having a first ionization tendency that differs from a second ionization tendency of a second material included in at least one of the conductive wiring or the plurality of wiring patterns
Data Source
AI summary
A semiconductor package includes a wiring substrate including a conductive wiring and a plurality of wiring patterns, a terminal pad including a plurality of outermost terminal pads adjacent to each end of the wiring substrate, and a buffer structure interposed between at least two outermost terminal pads from among the plurality of outermost terminal pads. The buffer structure includes a metal. The structure includes a first material having a first ionization tendency that differs from a second ionization tendency of a second material included in at least one of the conductive wiring or the plurality of wiring patterns.