ESD Protection Device Layout Area Reduction via Intersecting SCR and Diode String
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Solution Overview
Problem
Current electrostatic discharge protection devices have a larger layout area, which needs to be reduced to effectively prevent circuit damage in integrated circuits.
Innovation Solution
The electrostatic discharge protection device incorporates a silicon controlled rectifier and a diode string arranged along intersecting directions, with doped regions in the anode and cathode strategically positioned to minimize layout area while maintaining effective protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional electrostatic discharge protection device is used, then effective protection against electrostatic discharge is achieved, but the layout area becomes larger
Solution Approach 1:
The patent changes the traditional linear arrangement of the silicon controlled rectifier and diode string to an intersecting direction layout. The doped regions in the anode and cathode are arranged along a second direction that intersects with the first direction of the overall device arrangement, enabling more compact spatial utilization and reducing the total layout area while maintaining protection functionality
Solution Approach 2:
The patent positions the doped regions within well regions (N-type well and P-type well) in a nested configuration. The doped regions are located inside the respective well regions, allowing multiple functional elements to occupy overlapping or closely integrated spatial zones, thereby reducing the overall device footprint
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 significantly reduces the layout area of the electrostatic discharge protection device while enhancing its protective capabilities against electrostatic discharges.
Implementation Method 1
Electrostatic discharge (ESD) is a phenomenon that charges accumulate on a non-conductor or an ungrounded conductor and then rapidly move and discharge through a discharge path in a short time
Data Source
AI summary
An electrostatic discharge (ESD) protection device including a silicon controlled rectifier and a diode string arranged along a first direction is provided. The silicon controlled rectifier includes an anode and a cathode disposed separately from each other. The anode and the cathode respectively include doped regions. The doped regions in the anode are arranged along a second direction. The doped regions in the cathode are arranged along the second direction. The first direction intersects the second direction.