Hydrogen Supply Layering in Memory Cells to Block Upper-Layer Diffusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor memory devices face defects leading to errors and failures due to electrically active defects in substrates, causing leakage charges and degradation of memory operations, which existing technologies have not adequately addressed.
Innovation Solution
A semiconductor device structure incorporating a hydrogen source layer and a hydrogen diffusion barrier layer is used to provide hydrogen to active regions of the substrate, passivating dangling bonds and preventing hydrogen diffusion to upper layers, thereby enhancing data reliability and reducing leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrogen is supplied to active regions to passivate defects, then data reliability is improved, but hydrogen may diffuse to upper layers causing harmful effects
Solution Approach 1:
The patent divides the hydrogen supply mechanism into two separate functional layers: a hydrogen source layer that provides hydrogen atoms and a hydrogen diffusion barrier layer that prevents hydrogen from reaching upper layers. This segmentation allows the system to simultaneously achieve hydrogen passivation in active regions while blocking harmful hydrogen diffusion to upper layers, resolving the technical contradiction between improving data reliability and preventing harmful effects.
2Ease of manufacture
If existing technologies are used, then manufacturing is simpler, but electrically active defects cause leakage charges and memory operation degradation
Solution Approach 1:
The patent incorporates hydrogen source layers and hydrogen diffusion barrier layers into the memory device structure during the manufacturing process, before the device is put into operation. This preliminary action ensures that hydrogen is already available to passivate electrically active defects and prevent leakage charges, thereby improving memory operation reliability without adding complex post-manufacturing processes.
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 solution effectively improves data reliability and refresh rates of memory cells by providing hydrogen to active regions while preventing hydrogen-related issues in upper layers, thus addressing defects and enhancing overall memory performance.
Implementation Method 1
hydrogen atoms and/or molecules released from the hydrogen source layer may be diffused through conductive materials
Implementation Method 2
a hydrogen diffusion barrier layer may be disposed above the hydrogen source layer. The hydrogen diffusion barrier layer may prevent diffusion of the hydrogen atoms and/or molecules through the hydrogen diffusion barrier layer
Implementation Method 3
Hydrogenation of the substrate may deactivate the defects by passivating dangling bonds of silicon in the substrate by hydrogen atoms
Data Source
AI summary
Apparatuses and methods for controlling hydrogen diffusion to a substrate in manufacturing memory devices are described. An example apparatus includes: a substrate; an active region in the substrate; at least one first conductive material above the active region; a hydrogen source layer on the at least one first conductive material, the hydrogen source layer including hydrogen atoms and/or molecules and the hydrogen source layer configured to release the hydrogen atoms and/or molecules; a hydrogen diffusion barrier layer on the conductive layer; and at least one second conductive material above the hydrogen diffusion barrier layer, the at least one second conductive material coupled to the at least one first conductive material. The at least one first conductive material has hydrogen diffusion properties. The hydrogen diffusion barrier layer has hydrogen barrier properties.