Adjustable Multi-Trigger ESD Protection Semiconductor Structure
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Solution Overview
Problem
Conventional ESD protection semiconductor structures often suffer damage due to secondary breakdown when high voltage or current is applied, as they lack the ability to effectively manage discharge capacities and meet varying power standards.
Innovation Solution
A semiconductor structure with adjustable multi-trigger or single-trigger voltage capabilities is developed by connecting N-wells or P-wells in parallel, allowing for adjustable discharge capacities and preventing secondary breakdown through the integration of ion-doped layers and diffusion regions, which are connected via electrodes to manage voltage and current effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ESD protection semiconductor structures are used, then basic ESD protection is provided, but the device suffers damage due to secondary breakdown when high voltage or current is applied
Solution Approach 1:
The invention divides the ESD protection function into multiple discrete trigger levels by creating separate first and second trigger regions with different breakdown voltages. The first trigger region activates at a lower voltage to initiate protection, while the second trigger region activates at a higher voltage to provide additional protection layers, preventing secondary breakdown damage through staged response.
Solution Approach 2:
The invention implements dynamic ESD protection by creating voltage-dependent trigger mechanisms where the protection characteristics change based on the applied voltage level. The first and second trigger regions provide different protection modes depending on whether the voltage is below or above the second breakdown voltage, enabling adaptive response to varying ESD conditions.
2Power
If the power in the ESD protection circuits keeps increasing, then higher ESD protection is achieved, but the device reaches secondary breakdown voltage and may be damaged
Solution Approach 1:
The invention prepares protection mechanisms in advance by structuring the first trigger region to activate before the second breakdown voltage is reached. This preliminary triggering action initiates protection current flow and activates safety mechanisms before dangerous secondary breakdown conditions can develop, preserving device integrity even under high power ESD events.
Solution Approach 2:
The invention provides protective cushioning by creating the first trigger region that activates at a safe voltage level below the second breakdown voltage. This early activation serves as a cushioning mechanism that absorbs and redirects ESD energy through controlled current paths before the dangerous secondary breakdown threshold is approached, preventing damage accumulation.
3Device complexity
If a single trigger voltage is used, then the structure is simple, but it cannot meet different power standards or adjust discharge capacities
Solution Approach 1:
The invention achieves multi-functionality by integrating both first and second trigger regions within a single ESD protection device. This universal structure can operate in different protection modes depending on the ESD conditions, providing both single-trigger and multi-trigger functionality, and can be configured to meet various power standards through appropriate sizing and doping of the trigger regions.
Solution Approach 2:
The invention enables adaptability through parameter changes by allowing modification of the breakdown voltages, doping concentrations, and geometric dimensions of the first and second trigger regions. These parameter adjustments enable the device to be customized for different power standards and discharge capacity requirements while maintaining a unified structural framework.
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 structure effectively prolongs the prevention of secondary breakdown, enhancing ESD protection capabilities and accommodating different power standards by adjusting the impedance and discharge capacities of N-wells or P-wells, thereby improving the reliability of ESD protection in semiconductor devices.
Implementation Method 1
electrostatic discharge (ESD) protection device
Data Source
AI summary
An electrostatic discharge (ESD) protection device with adjustable single-trigger or multi-trigger voltage is provided. The semiconductor structure has multi-stage protection semiconductor circuit function and adjustable discharge capacity. The single-trigger or multi-trigger semiconductor structure may be fabricated by using the conventional semiconductor process, and can be applied to IC semiconductor design and to effectively protect the important semiconductor devices and to prevent the semiconductor devices from ESD damage. In particular, the present invention can meet the requirements of high power semiconductor device and has better protection function compared to conventional ESD protection circuit. In the present invention, a plurality of N-wells or P-wells connected in parallel are used to adjust the discharge capacity of various wells in the P-substrate so as to improve the ESD protection capability and meet different power standards.