Capacitor Discharge Structure for Plasma-Induced Damage Protection
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Solution Overview
Problem
Plasma-induced charge during semiconductor device fabrication leads to degradation of electrical performance, necessitating a solution to prevent plasma-induced damage (PID).
Innovation Solution
A semiconductor device with a capacitor and a discharge structure connected to the upper electrode, designed to discharge plasma-induced charges to a substrate, thereby preventing damage to the dielectric layer and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If plasma processes are used for deposition or etching, then manufacturing capability is improved, but plasma-induced charge degrades electrical performance
Solution Approach 1:
A discharge structure is introduced as an intermediary component between the plasma process and the capacitor. This discharge structure includes a discharge electrode that collects plasma-induced charges and discharges them to a reference potential, preventing charge accumulation that would otherwise degrade the dielectric layer and reduce electrical performance.
Solution Approach 2:
The patent converts the harmful plasma-induced charge into a beneficial effect by providing a controlled discharge path. The discharge structure safely dissipates the accumulated charge through a diode to a reference potential, transforming the harmful charge accumulation into a controlled discharge process that protects the capacitor while maintaining plasma process efficiency.
2Reliability
If discharge structure is added to prevent plasma-induced damage, then electrical performance is improved, but device complexity increases
Solution Approach 1:
The discharge structure is designed to serve multiple functions: it collects plasma-induced charges, provides a discharge path to reference potential, and protects the dielectric layer from charge accumulation damage. By consolidating these protective functions into a single integrated structure, the patent minimizes the increase in device complexity while maximizing the improvement in electrical performance.
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 discharge structure effectively prevents plasma-induced damage, enhancing the semiconductor device's performance by safely dissipating charges induced during plasma processes.
Implementation Method 1
a discharge structure spaced apart from the capacitor, connected to the upper electrode of the capacitor and suitable for discharging, to the substrate, a charge induced from a plasma process for forming the upper electrode of the capacitor
Data Source
AI summary
A semiconductor device includes: a capacitor disposed over a substrate including a lower electrode, a dielectric layer, and an upper electrode; and a discharge structure spaced apart from the capacitor, connected to the upper electrode of the capacitor, and suitable for discharging, to the substrate, a charge induced from a plasma process for forming the upper electrode of the capacitor.