DRAM Storage Capacitor Electrode Stabilization via Oxidized Support Frame
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In DRAM cells, the high aspect ratio of storage capacitors leads to electrode wobbliness and potential contact between adjacent electrodes, causing malfunction due to the inability of existing lattice structures to stabilize the middle portions of the electrodes effectively.
Innovation Solution
A support frame comprising a combination of materials with different densities, where the denser material forms a support structure around each electrode, including oxidation of a doped oxidizable material like polysilicon to create a stable framework that surrounds and secures the electrodes, preventing wobbliness and contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the electrodes of the storage capacitor are made with sufficiently large overlapped areas to increase capacitance, then the capacitance is improved, but the height of the storage capacitor increases causing the electrodes to slope and potentially contact each other
Solution Approach 1:
The patent changes the physical and chemical parameters of the electrode structure by forming a lattice framework using carbon or aluminum deposition. This framework modifies the mechanical properties of the electrode, providing structural support that prevents sloping while maintaining the required capacitance through sufficient overlapped areas.
Solution Approach 2:
The patent creates a composite structure by combining the conductive electrode material with a lattice framework made of carbon or aluminum. This composite structure integrates both the electrical function (conductive material) and the mechanical support function (lattice framework), resolving the contradiction between capacitance and stability.
2Stability of the object's composition
If a carbon or aluminum lattice structure is formed on the top portions of electrodes to prevent sloping, then the top portion stability is improved, but the middle portions of the electrodes remain wobbly and adjacent electrodes may contact each other
Solution Approach 1:
The patent transitions from a two-dimensional top-layer lattice structure to a three-dimensional framework that extends along the height of the electrode. This dimensional extension allows the lattice structure to provide support not only at the top but also at intermediate levels, preventing middle portion wobbles and adjacent electrode contact.
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 proposed solution effectively stabilizes the electrodes, preventing wobbliness and contact between adjacent electrodes, thereby enhancing the reliability and functionality of DRAM cells by maintaining the desired positions of the electrodes and ensuring sufficient capacitance.
Implementation Method 1
oxidizing the exposed second material to form a support frame
Data Source
AI summary
A capacitor array includes a plurality of capacitors and a support frame. Each capacitor includes an electrode. The support frame supports the plurality of electrodes and includes a plurality of support structures corresponding to the plurality of electrodes. Each support structure may surround the respective electrode. The support frame may include oxide of a doped oxidizable material.