Memory Module ESD Protection via Isolated Circuit Pattern
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Solution Overview
Problem
ElectroStatic Discharge (ESD) from individuals or objects often damages memory devices on printed circuit boards, as consumers and repairmen may not consistently wear grounding bands, leading to malfunction or permanent damage of memory modules in electronic systems.
Innovation Solution
A memory module design featuring a printed circuit board with a first circuit pattern for connecting memory devices and a second circuit pattern that is not connected to the first but is exposed to discharge static electricity into a ground, effectively preventing ESD damage by routing static electricity to a ground pattern on the main board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If workers wear grounding bands to prevent ESD, then memory devices are protected from damage, but consumers and repairmen may not consistently wear them leading to damage risk
Solution Approach 1:
The memory module automatically provides ESD protection through its built-in second circuit pattern that discharges static electricity without requiring user action. The module serves itself by having an intrinsic ESD prevention mechanism that activates automatically when static electricity is introduced, eliminating the need for users to wear grounding bands or take any protective measures.
Solution Approach 2:
The second circuit pattern is pre-configured on the PCB to provide ESD protection before any damage can occur. The discharge path for static electricity is established in advance through the circuit design, so when ESD events happen during handling or operation, the protection is already in place and immediately effective without requiring any preparatory actions by users.
2Reliability
If a second circuit pattern is added to discharge static electricity, then ESD protection is provided, but the circuit board complexity increases
Solution Approach 1:
The circuit board is segmented into two distinct circuit patterns with separate functions: the first circuit pattern handles normal memory operations and data transmission, while the second circuit pattern is dedicated exclusively to ESD protection. This segmentation allows each circuit to be optimized for its specific purpose without interfering with the other, and the ESD protection function is added as a separate, modular component rather than complicating the existing memory circuitry.
Solution Approach 2:
The ESD protection function is extracted as a separate second circuit pattern that is electrically isolated from the first circuit pattern. By taking out the ESD protection functionality into a distinct circuit path, the design avoids complicating the main memory circuits while still providing comprehensive protection. The two circuit patterns operate independently, with the second pattern activated only when ESD events occur.
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 solution effectively discharges static electricity from the memory module to the ground, preventing damage and ensuring reliable operation of the memory module and the system it is part of, even when users do not wear grounding equipment.
Implementation Method 1
the second circuit pattern may be configured to discharge static electricity introduced to the memory module from outside the memory module
Data Source
AI summary
Disclosed is a memory module having an ElectroStatic Discharge (ESD) prevention structure. The memory module may include a printed circuit board, a first circuit pattern on the printed circuit board, and a second circuit pattern on the printed circuit board. The second circuit pattern may be configured to discharge static electricity introduced to the memory module from outside the memory module. In addition, the second circuit pattern is not connected to the first circuit pattern. Disclosed also is a system that includes the memory module. The system may include a main board, a socket on the main board, and the memory module.