Transient Trigger Circuit for Bonding Pad Discharge Protection
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Solution Overview
Problem
Integrated circuits are vulnerable to damage from high currents and voltage spikes due to their reduced size, necessitating a protection circuit that can quickly provide a discharge path to prevent semiconductor component damage.
Innovation Solution
A protection circuit comprising a trigger circuit and a discharge circuit, where the trigger circuit, consisting of transistors of the same conductivity type, detects transient events and generates a trigger voltage to activate the discharge circuit, providing a discharge path between the bonding pad and ground to dissipate high currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the size of semiconductor components is reduced to improve performance and operation speed, then performance and operation speed are improved, but the components become more vulnerable to damage from high current and voltage spikes
Solution Approach 1:
The protection circuit is pre-configured with trigger circuits and discharge circuits that are activated before damage can occur. When a transient event is detected, the discharge circuit immediately provides a discharge path to ground, preventing the high current from damaging the semiconductor components.
Solution Approach 2:
The protection circuit acts as an intermediary between the bonding pad and the semiconductor components. It includes a trigger circuit that detects transient events and a discharge circuit that provides a discharge path to ground, thereby protecting the downstream components from high current damage.
2Reliability
If a protection circuit is added to provide discharge path capability, then reliability against high current is improved, but device complexity increases
Solution Approach 1:
The protection circuit is segmented into distinct functional modules: trigger circuits that detect transient events and discharge circuits that provide discharge paths. This segmentation allows each module to be optimized independently while working together to provide comprehensive protection.
Solution Approach 2:
The protection circuit design uses transistors that can serve multiple functions - they are part of the trigger circuit for detection and also form the discharge circuit for current diversion. This multi-functionality reduces the overall component count and simplifies the circuit structure.
3Speed
If the discharge circuit is activated quickly to dissipate high current, then protection efficiency is improved, but the trigger circuit complexity increases
Solution Approach 1:
The trigger circuit is designed to automatically detect transient events and activate the discharge circuit without external intervention. The circuit uses the inherent properties of the transistors and bonding pad to detect voltage changes and trigger the discharge path activation, achieving fast response through self-service mechanisms.
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 protection circuit effectively and quickly dissipates high currents, preventing damage to semiconductor components by establishing a discharge path when transient events occur, thus enhancing the reliability of integrated circuits.
Implementation Method 1
The trigger circuit detects whether a transient event occurs on the bonding pad
Implementation Method 2
the discharge circuit is coupled between the bonding pad and the ground terminal and controlled by the trigger circuit. When a transient event occurs on the bonding pad, the trigger circuit generates a trigger voltage to trigger the discharge circuit to provide a discharge path between the bonding pad and the ground
Data Source
AI summary
A power detection circuit is provided. The protection circuit is coupled to a pad and includes a trigger circuit and a discharge circuit. The trigger circuit includes a first transistor of a first conductivity type and a second transistor, also of the first conductivity type, which are coupled in series between the pad and a ground terminal. The trigger circuit detects whether a transient even occurs on the pad. The discharge circuit is coupled between the bonding pad and the ground terminal and controlled by the trigger circuit. In response to the transient event occurring on the bonding pad, the trigger circuit generates a trigger voltage to trigger the discharge circuit to provide a discharge path between the pad and the ground terminal.