Magnetic Disk Filter Structure for Glycol Ether Adsorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The presence of large amounts of gas molecules in a hard disk drive (HDD) housing deteriorates the controllability of the distance between the head and the disk, leading to a shortened lifetime of the HDD.
Innovation Solution
A magnetic disk device equipped with a filter structure containing a porous body with an average pore diameter of 0.4 nm to 1.0 nm, optimized to adsorb glycol ether, is used to remove gas molecules with a valid diameter of 1.0 nm or less, thereby extending the device's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas molecules are present in the HDD housing, then the device can operate with standard components, but the controllability of the distance between the head and the disk deteriorates and lifetime is shortened
Solution Approach 1:
The patent employs a porous body with specifically controlled pore size (0.4 nm to 1.0 nm average diameter) that allows gas molecules to pass through while adsorbing them. The porous structure provides large surface area for adsorption, effectively removing glycol ether and other gas molecules from the HDD housing without requiring complete sealing or vacuum conditions.
Solution Approach 2:
The patent uses a composite filter structure combining the porous body with a housing structure. The porous material is integrated into the HDD housing to create a composite system that simultaneously maintains structural integrity and provides gas molecule adsorption capability, extending HDD lifetime in the presence of gas molecules.
2Reliability
If a filter structure with porous body is added to remove gas molecules, then HDD lifetime is extended, but device complexity increases
Solution Approach 1:
The porous body serves as a standalone functional component that can be directly integrated into the existing HDD housing without requiring complex multi-stage filtration systems. The inherent porosity of the material provides the filtering function, simplifying the overall device structure while maintaining effectiveness in removing gas molecules.
Solution Approach 2:
The patent optimizes the pore size parameter of the porous body to fall within the specific range of 0.4 nm to 1.0 nm average diameter. This parameter optimization allows the filter to effectively adsorb gas molecules like glycol ether while maintaining structural simplicity and avoiding the need for complex adjustable or multi-component filtration systems.
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 filter effectively adsorbs gas molecules such as glycol ether and glycol ester, reducing contamination and enhancing the HDD's performance and longevity by inhibiting the adhesion of high viscosity and boiling point molecules.
Implementation Method 1
a porous body with an average pore diameter of 0.4 nm to 1.0 nm, optimized for adsorbing glycol ether
Data Source
AI summary
A magnetic disk device includes a housing, a disk rotatably provided in the housing, a head provided in the housing and capable of writing and reading information to and from the disk, a voice coil motor provided in the housing and driving the head, and a filter structure provided in the housing and having a porous body including a first porous body with an average pore diameter of 0.4 nm or more and 1.0 nm or less, that is optimized for adsorbing glycol ether.