HDD Template Fabrication via Block Copolymer Self-Assembly
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Solution Overview
Problem
The existing manufacturing process for hard disk drive (HDD) templates is time-consuming and prone to errors due to the separate fabrication of data zones and servo zones, requiring multiple steps that can introduce inaccuracies.
Innovation Solution
A method is developed to simultaneously form data zone guiding patterns and servo zone guiding patterns using directed self-assembly of block copolymers, guided by these patterns, which reduces the number of manufacturing steps and increases template quality by eliminating unnecessary processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data zones and servo zones are fabricated separately using existing manufacturing processes, then each zone can be formed with dedicated processing steps, but the overall manufacturing time increases and errors are more prone to occur due to multiple sequential steps
Solution Approach 1:
The patent combines the fabrication of data zones and servo zones into a single simultaneous self-assembly process. The block copolymer system is designed with multiple block types (e.g., A-B and C-D blocks) that self-assemble into distinct patterns for both data and servo zones in one step, eliminating the need for separate processing steps and reducing overall fabrication time while maintaining pattern quality
2Ease of manufacture
If multiple separate manufacturing steps are used to form different zones, then each zone can be optimized independently, but the complexity of the manufacturing process increases and introduces more potential error sources
Solution Approach 1:
The patent employs self-directed self-assembly where block copolymers automatically organize into the desired data zone and servo zone patterns without requiring complex external guidance. The chemical composition and architecture of the block copolymers are designed to inherently direct their assembly into the correct spatial arrangements, reducing reliance on complex external manufacturing steps and minimizing error sources
3Productivity
If sequential fabrication of data zones and servo zones is performed, then each zone can be processed with appropriate parameters, but the total number of manufacturing steps increases
Solution Approach 1:
The patent uses composite block copolymer materials containing multiple block types (e.g., A-B blocks and C-D blocks) within the same system. These composite materials enable simultaneous formation of different zone patterns through a single self-assembly process, reducing the number of manufacturing steps while maintaining the ability to optimize each zone's characteristics through material composition control
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 approach significantly decreases the time needed to fabricate templates, enhances their quality by removing potential errors from extra steps, and allows for concurrent formation of servo and data zone patterns, improving the efficiency of the HDD manufacturing process.
Implementation Method 1
Directed self-assembly of block copolymers is guided by the data zone guiding pattern and the servo zone guiding pattern
Data Source
AI summary
Provided herein is a method including forming a data zone guiding pattern and forming a servo zone guiding pattern. A servo pattern and a data pattern are simultaneously formed. Directed self-assembly of block copolymers is guided by the data zone guiding pattern and the servo zone guiding pattern.