Oxide-Channel Memory Transistors With Heterogeneous Gate Insulators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing memory technologies face challenges in developing improved transistors and memory architectures that enhance performance and efficiency.
Innovation Solution
The development of transistors with semiconductor oxide channel materials and heterogeneous insulative regions between the gate material and the channel material, which include multiple insulative compositions with varying dielectric constants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a simple insulative region is used between gate material and channel material, then manufacturing is easier, but coupling between gate and channel is insufficient
Solution Approach 1:
The insulative region is divided into multiple distinct layers (first insulative layer, second insulative layer, third insulative layer) with different dielectric constants. This segmentation allows each layer to contribute differently to the overall coupling, with higher dielectric constant materials providing stronger electrical coupling while lower dielectric constant materials providing electrical isolation, thereby resolving the contradiction between achieving good coupling and maintaining structural simplicity.
Solution Approach 2:
The insulative region employs a composite structure combining multiple insulative materials with varying dielectric constants (e.g., hafnium oxide, silicon oxide, aluminum oxide). This composite approach enables the insulative region to simultaneously provide both strong coupling (through high-k materials) and effective isolation (through low-k materials), resolving the contradiction between coupling effectiveness and structural complexity.
2Speed
If switching speed is increased for rapid ON/OFF configuration, then operational performance is enhanced, but energy loss increases
Solution Approach 1:
The patent optimizes the dielectric constant parameters of the insulative layers to achieve a balance between switching speed and energy loss. By selecting specific dielectric constants for each layer (with the first layer having higher dielectric constant than the second and third layers), the structure enables rapid charge/discharge cycles (fast switching) while minimizing leakage current and energy dissipation, thus resolving the contradiction between speed and energy efficiency.
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 solution enables improved coupling between the gate material and the channel material, allowing for rapid switching between ON and OFF configurations, thereby enhancing the operational characteristics of the transistors and memory arrays.
Implementation Method 1
a heterogenous insulative region between a gate material and the channel material
Data Source
AI summary
Some embodiments include integrated memory having an array of access transistors. Each access transistor includes an active region which has a first source/drain region, a second source/drain region and a channel region. The active regions of the access transistors include semiconductor material having elements selected from Groups 13 and 16 of the periodic table. First conductive structures extend along rows of the array and have gating segments adjacent the channel regions of the access transistors. Heterogenous insulative regions are between the gating segments and the channel regions. Second conductive structures extend along columns of the array, and are electrically coupled with the first source/drain regions. Storage-elements are electrically coupled with the second source/drain regions. Some embodiments include a transistor having a semiconductor oxide channel material. A conductive gate material is adjacent to the channel material. A heterogenous insulative region is between the gate material and the channel material.