Template Recess Adjustor for Uniform Plasma Etching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current nanoimprint technology faces challenges in achieving high precision patterns due to fluctuations in etching rates caused by the presence of recesses on the back surface of templates, leading to degraded surface precision during the pattern transfer process.
Innovation Solution
An apparatus and method utilizing a vacuum chamber with an electrode and an insulative adjustor to control the etching process by maintaining a uniform plasma potential, ensuring consistent etching rates and precision through the use of an inductively coupled plasma etching system and an adjustor that fits into the recess on the substrate, thereby stabilizing the gap width and potential distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a recess is provided in the back surface of the template to improve ease of operation and throughput, then the template deforms easily and peeling becomes easier, but the etching rate fluctuates and manufacturing precision degrades
Solution Approach 1:
A dielectric member is introduced as an intermediary component between the electrode and the template substrate. This dielectric member fills the recess portion and has a height that matches the recess depth, thereby eliminating the gap that causes plasma potential fluctuations. The dielectric member acts as a mediator that maintains uniform plasma potential across the substrate surface while preserving the recess structure's beneficial mechanical properties for ease of peeling.
2Productivity
If a recess is provided in the back surface of the template to increase productivity, then the pattern transfer process becomes more efficient, but plasma potential fluctuates and etching precision decreases
Solution Approach 1:
The dielectric member serves as a mediator that resolves the conflict between productivity and etching precision. By filling the recess portion with a dielectric material, the plasma potential is stabilized across the entire substrate surface, ensuring uniform etching rates. This allows the recess structure to remain in place for ease of template peeling and high throughput, while the dielectric member prevents plasma potential fluctuations that would otherwise degrade etching precision.
3Manufacturing precision
If the gap between the electrode and substrate is reduced to improve manufacturing precision, then etching uniformity improves, but the complexity of the device increases
Solution Approach 1:
Rather than reducing the overall gap between the electrode and substrate (which would increase device complexity), a dielectric member is introduced as an intermediary that specifically fills the recess portion. This localized approach maintains the original electrode-substrate gap distance while eliminating the non-uniformity caused by the recess, thereby achieving etching uniformity without increasing overall device complexity.
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 enables the production of templates with high pattern precision by maintaining uniform etching rates and reducing potential fluctuations, enhancing the throughput and precision of the pattern transfer process.
Implementation Method 1
perform dry etching of a surface on a front side of the substrate in a state in which an adjustor is inserted into an interior of the recess
Implementation Method 2
inductively coupled plasma etching system
Data Source
AI summary
According to one embodiment, an apparatus for manufacturing a template includes a vacuum chamber, an electrode and an adjustor. The vacuum chamber includes an inlet and an exhaust port of a reactive gas. The vacuum chamber is capable of maintaining an atmosphere depressurized below atmospheric pressure. The electrode is provided in an interior of the vacuum chamber. A high frequency voltage is applied to the electrode. A substrate is placed on the electrode. The substrate has a back surface on a side of the electrode. A recess is provided in the back surface. The adjustor is inserted into the recess. The adjustor is insulative.