Semiconductor Unit Trigger Device Integration for ESD Protection
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Solution Overview
Problem
Existing semiconductor units face challenges in reducing the layout area of integrated circuits while effectively protecting against electrostatic discharge (ESD), as traditional protection circuits require separate components for trigger signal generation and discharge, leading to increased layout space.
Innovation Solution
A semiconductor unit and electronic apparatus are designed with a trigger device integrated within the transistor region, generating a trigger signal based on applied voltage to control transistor conduction, reducing layout area by combining trigger and transistor components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional protection circuits use separate trigger circuit and transistor components, then ESD protection function is achieved, but layout area increases
Solution Approach 1:
The trigger device is integrated within the transistor region by forming the trigger device's electrode between the source and drain of the transistor, merging two previously separate components (trigger circuit and transistor) into a single integrated structure. This integration maintains the ESD protection function while reducing the layout area by eliminating the need for separate trigger circuit components.
2Area of stationary object
If trigger device is integrated in transistor region, then layout area is reduced, but manufacturing complexity increases
Solution Approach 1:
The transistor region is segmented into functional zones: the trigger device is formed in a first region between source and drain, while the channel formation region is in a second region. This segmentation allows the trigger device and transistor channel to coexist in the same transistor region without interfering with each other's formation processes, thereby reducing layout area while managing manufacturing complexity through clear spatial separation of functions.
3Ease of manufacture
If separate trigger circuit components are used, then manufacturing process is simpler, but layout area increases
Solution Approach 1:
The transistor region serves multiple functions: it forms both the transistor channel (for normal device operation) and houses the trigger device (for ESD protection). The same region that would traditionally be dedicated solely to the transistor now simultaneously accommodates the trigger device, enabling the region to perform dual functions and thereby reducing the overall layout area without requiring separate dedicated spaces for each component.
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 layout area of protection circuits while enhancing tolerance to static electricity through snapback operations, allowing efficient discharge of static electricity to ground, thereby improving ESD protection without increasing the circuit's footprint.
Implementation Method 1
a transistor configured to provide electrical conduction between a first terminal and a second terminal, based on a trigger signal
Implementation Method 2
the trigger circuit generates a trigger signal by rounding a waveform of a voltage signal caused by static electricity applied to the power supply terminal
Implementation Method 3
the protection circuit discharges static electricity applied to the power supply terminal to a ground through the N-type MOS transistor
Data Source
AI summary
A semiconductor unit includes: a transistor configured to provide electrical conduction between a first terminal and a second terminal, based on a trigger signal; and a trigger device formed in a transistor region where the transistor is formed, and configured to generate the trigger signal, based on a voltage applied to the first terminal.