Compact ESD Protection Circuit Layout Without Dummy Patterns
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Solution Overview
Problem
Existing electrostatic discharge protection circuits are not optimized for reduced size, leading to potential increased size and complexity issues in electronic devices, which can compromise their effectiveness and efficiency in protecting against static electricity.
Innovation Solution
The proposed electrostatic discharge protection circuit includes a pull-down switch, clamp switches, and a resistor, with the drains of the clamp switches coupled to a power terminal and sources coupled to a ground terminal, forming a compact structure that discharges static electricity efficiently, while a dummy pattern is omitted to prevent physical defects and reduce size, and the pull-down switch and resistor are formed in the same layer to minimize space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrostatic discharge protection circuits are used, then protection function is provided, but circuit size increases
Solution Approach 1:
The resistor and pull-down switch are formed in the same layer, merging two components into a single fabrication layer to reduce overall circuit area while maintaining the protection function
Solution Approach 2:
The circuit components are arranged in a compact layout with clamp switches, pull-down switch, and resistor positioned to optimize space utilization in the planar dimension, reducing the footprint of the protection circuit
2Manufacturing precision
If dummy pattern is included, then manufacturing defects are prevented, but circuit size increases
Solution Approach 1:
The dummy pattern is completely removed from the circuit design, extracting the non-essential element that was previously used for defect prevention, thereby reducing circuit area without compromising manufacturing precision
Solution Approach 2:
The clamp switches and pull-down switch are positioned and configured to serve multiple functions simultaneously, including providing adequate spacing and structural support that previously required separate dummy patterns, enabling the circuit to be self-sufficient without additional defect prevention elements
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
This configuration effectively reduces the size of the electrostatic discharge protection circuit while maintaining its ability to discharge static electricity, thereby enhancing the protection of electronic device components without increasing the circuit's size or complexity.
Implementation Method 1
an electrostatic discharge protection circuit may include a pull-down switch, a dummy pattern arranged parallel to the pull-down switch in a first direction, clamp switches arranged parallel to each other in the first direction between the dummy pattern and the pull-down switch
Implementation Method 2
a resistor arranged parallel to the pull-down switch and configured to transfer a power supply voltage supplied through a power terminal to a first gate pattern of the pull-down switch
Data Source
AI summary
An electrostatic discharge protection circuit includes a pull-down switch, a dummy pattern arranged parallel to the pull-down switch in a first direction, clamp switches arranged parallel to each other in the first direction between the dummy pattern and the pull-down switch, and a resistor configured to transfer a power supply voltage supplied through a power terminal to a gate pattern of the pull-down switch by being arranged parallel to the pull-down switch. Drains of the clamp switches are coupled in common to the power terminal, sources of the clamp switches are coupled in common to a ground terminal, and a first end of the pull-down switch and a second end of the resistor are coupled to each other through a first conductive line extending in the first direction, the pull-down switch, the resistor and the first conductive line are formed in a same layer.