Semiconductor Memory Terminal Layout for High-Speed PCIe Signals
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Solution Overview
Problem
The increasing data transmission amounts and times in semiconductor memory devices, such as removable memory cards, are not efficiently managed by existing communication interfaces, leading to inefficiencies in data transfer.
Innovation Solution
A semiconductor memory device design that includes a housing with specific terminal arrangements and a controller supporting PCIe standard, utilizing differential data signals and multiple power supply terminals to enhance data transmission rates and stability, along with optimized wire line configurations to minimize noise and voltage drops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the communication interface speed is increased to shorten data transmission time, then data transmission rate is improved, but electrical stability and noise resistance deteriorate
Solution Approach 1:
The terminal arrangement is segmented into multiple rows with different functions: first row terminals for high-speed differential data signals, second row terminals for power supply and control signals, and third row terminals for additional data signals. This segmentation allows optimized routing and shielding for each signal type, maintaining electrical stability at high speeds.
Solution Approach 2:
A controller is introduced as an intermediary component between the memory device and the communication interface. The controller manages signal timing, voltage regulation, and protocol compliance, ensuring electrical stability is maintained even at increased data transmission rates.
2Productivity
If the data transmission amount is increased to improve productivity, then data transmission time is increased, but existing communication interfaces become inefficient
Solution Approach 1:
The terminal structure is designed with multi-functionality to handle various signal types simultaneously. The same physical layout supports differential data signals, power supply, clock signals, and control signals through systematic row assignments, reducing overall interface complexity while maintaining high productivity.
Solution Approach 2:
The terminal arrangement extends into multiple spatial dimensions (rows and columns) to organize signals efficiently. By distributing signals across multiple rows rather than concentrating them in a single plane, the design achieves higher data transmission capacity without proportionally increasing interface complexity.
3Adaptability or versatility
If multiple power supply terminals are added to support different voltage levels, then adaptability is improved, but device complexity increases
Solution Approach 1:
Power supply terminals are segmented into specific rows (second row in this case) separate from data signal terminals. This segmentation allows independent optimization of power delivery paths and simplifies voltage regulation, improving adaptability to different power supply configurations without excessive complexity.
Solution Approach 2:
The controller manages different power supply voltage levels by changing operational parameters rather than requiring separate physical circuits for each voltage level. This allows the same terminal arrangement to support multiple voltage levels through software-controlled parameter adjustment, improving adaptability while minimizing hardware complexity.
Data Source
AI summary
According to one embodiment, a semiconductor memory device includes a housing and terminals. The housing has a first end edge extending in a first direction and a second end edge opposite to the first end edge. The terminals include signal terminals and include first terminals, second terminals, and third terminals. The first terminals are arranged in the first direction at a position close to the first end edge. The second terminals are arranged in the first direction with intervals at a position closer to the first end edge than the second end edge. The first plurality of terminals are closer to the first end edge than the second plurality of terminals are. The third terminals are arranged in the first direction with intervals at a position closer to the second end edge than the first end edge.