Fluorocarbon Opening Fill for Uniform Semiconductor Deposition
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Solution Overview
Problem
Conventional semiconductor fabrication processes face challenges in uniformly filling openings of different sizes with insulative or conductive materials, often resulting in under-fill in larger openings and overburden across the semiconductor construction due to fluid dynamics and size distribution issues.
Innovation Solution
The method involves using spray particles or aerosol drops with adjustable physical properties to fill openings of varying sizes, combined with adhesion-promoting and adhesion-reducing liners to ensure precise material deposition and minimize overfill, utilizing techniques such as patterned screening, nanoimprint, and fluorocarbon materials to manage material distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fluid filling methods are used to fill multiple openings, then the process is simple and fast, but under-fill occurs in larger openings and overburden occurs across regions between openings
Solution Approach 1:
The patent applies local quality by using adhesion-promoting liners selectively within openings and adhesion-reducing liners selectively between openings. This spatial differentiation of liner properties ensures material is retained within openings while preventing overburden between openings, directly resolving the fill uniformity issue without requiring complex filling processes
Solution Approach 2:
The patent employs preliminary action by forming both adhesion-promoting and adhesion-reducing liners before the material filling step. This pre-preparation of selective adhesion surfaces guides subsequent material deposition, ensuring uniform filling occurs during the filling process itself rather than requiring post-processing corrections
2Manufacturing precision
If material is deposited to fill larger openings, then larger openings are adequately filled, but excess material (overburden) accumulates across regions between openings
Solution Approach 1:
The patent uses adhesion-reducing liners positioned between openings to create low-adhesion regions that repel excess material. This local property differentiation allows material to completely fill larger openings while automatically preventing overburden accumulation in inter-opening regions, optimizing both fill completeness and material usage
Solution Approach 2:
The adhesion-reducing liner acts as an intermediary barrier between openings, controlling material flow and preventing excessive material from bridging between adjacent openings. This mediator ensures material stays within intended openings while allowing adequate filling of varying opening sizes
3Manufacturing precision
If uniform material deposition is achieved across all openings, then filling uniformity improves, but smaller openings receive excess material (overburden)
Solution Approach 1:
The patent implements local quality through spatially differentiated liner placement: adhesion-promoting liners inside openings capture material efficiently, while adhesion-reducing liners between openings prevent material accumulation. This local property variation enables uniform deposition across all openings regardless of size, while preventing overburden in smaller openings
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 allows for efficient and uniform filling of openings of different sizes with minimal overburden, enabling precise material placement and effective curing, which enhances the reliability and performance of semiconductor constructions.
Implementation Method 1
an adhesion-reducing surface is formed to be along regions of the semiconductor construction between the openings and to not be within the openings. The insulative material does not substantially adhere to the adhesion-reducing surface
Implementation Method 2
In some embodiments, an adhesion-promoting liner is provided within openings extending into a semiconductor construction prior to formation of insulative material within the openings
Data Source
AI summary
Some embodiments include a construction having a horizontally-extending layer of fluorocarbon material over a semiconductor construction. Some embodiments include methods of filling openings that extend into a semiconductor construction. The methods may include, for example, printing the material into the openings or pressing the material into the openings. The construction may be treated so that surfaces within the openings adhere the material provided within the openings while surfaces external of the openings do not adhere the material. In some embodiments, the surfaces external of the openings are treated to reduce adhesion of the material.