Silicone Rubber Crash Stops for Low-Outgassing HDD Reliability
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Solution Overview
Problem
Existing crash stops in data storage devices, such as hard disk drives, face challenges in providing effective shock absorption and anti-stiction properties while minimizing reliability issues caused by contaminants like triphenylphosphine oxide and volatile siloxanes, particularly in sealed environments.
Innovation Solution
The use of cured silicone rubber, free from non-oxygen and non-silicon heteroatoms, and without double or triple covalent bonds, is incorporated into crash stops to provide shock absorption and anti-stiction properties, avoiding contaminants that can degrade HDD reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional rubber materials are used in crash stops, then shock absorption capability is provided, but contaminants like triphenylphosphine oxide and volatile siloxanes are released causing reliability issues
Solution Approach 1:
The patent changes the chemical composition parameters of the rubber material by specifying precise ranges of silicon oxide, zinc oxide, stearic acid, and other additives to eliminate harmful outgassing while maintaining shock absorption properties
Solution Approach 2:
The patent uses a composite rubber formulation combining multiple components including silicon oxide, zinc oxide, stearic acid, and various additives in specific proportions to create a material that provides shock absorption without releasing contaminants
2Force
If silicone rubber with heteroatoms and double/triple bonds is used, then shock absorption is achieved, but outgassing and contamination occur in sealed environments
Solution Approach 1:
The patent modifies the chemical structure parameters by specifying saturation levels and restricting heteroatom content to eliminate outgassing while preserving the elastic shock absorption mechanism
Solution Approach 2:
The patent creates an inert chemical environment within the sealed HDD by using a rubber formulation that does not release volatile substances, effectively eliminating contamination in the sealed space
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 silicone rubber-based crash stops offer improved shock absorption and anti-stiction properties with minimal outgassing and contamination, enhancing the reliability and performance of data storage devices, especially in sealed configurations.
Implementation Method 1
At least a portion of the crash stop includes an outer region having at least one cured, silicone rubber
Implementation Method 2
The silicone rubber-based crash stops offer improved shock absorption and anti-stiction properties
Data Source
AI summary
Data storage devices that include one or more crash stops that include cured, silicone rubber. Related articles (e.g., shock-absorbing member) that include cured, silicone rubber for crash stops and methods of making shock-absorbing members that include cured, silicone rubber.