Cleavable Surfactants for Residue-Free Semiconductor Surface Treatment
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Solution Overview
Problem
Current semiconductor substrate manufacturing processes face challenges in completely removing chemical additives, such as surfactants, from surfaces, leading to residual issues that affect device performance and require extensive processing steps, which are time-consuming and economically inefficient.
Innovation Solution
An organic compound with a cleavable surfactant structure, comprising a tail group, a head group, and a linking group, is used to modify semiconductor surfaces, allowing for subsequent thermal cleavage and easy removal of fragments, thereby facilitating the complete removal of the surfactant from the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional surfactants are used in semiconductor substrate processing, then surface modification and treatment are achieved, but complete removal of the surfactant from the surface becomes difficult, leading to residual issues
Solution Approach 1:
The surfactant molecule is divided into three distinct segments: a head group that provides surface activity, a tail group that provides solubility, and a cleavable linking group that connects them. This segmentation allows the surfactant to perform its function during processing and then be selectively removed by cleaving the linking group, resolving the contradiction between achieving surface modification and enabling complete removal.
Solution Approach 2:
The surfactant is designed with a predetermined cleavable linking group that will be broken under specific conditions (thermal, chemical, or photolytic) after the surfactant has performed its surface modification function. This preliminary design of the cleavable bond allows for easy subsequent removal, eliminating the need for extensive additional processing steps.
2Manufacturing precision
If extensive processing steps are used to remove surfactant residues, then surface cleanliness is improved, but processing time increases and economic efficiency decreases
Solution Approach 1:
The surfactant is pre-designed with a cleavable linking group that enables straightforward removal under mild conditions. This preliminary design eliminates the need for multiple extensive processing steps, thereby reducing processing time and maintaining high productivity while achieving complete surfactant removal.
Solution Approach 2:
The cleavable linking group is designed to undergo specific parameter changes (temperature, pH, or light exposure) that trigger its breakdown. By changing these parameters after surfactant application, the surfactant can be completely removed in a single step rather than requiring multiple processing steps, thus improving productivity.
3Productivity
If surfactant residues remain on the surface, then processing steps are reduced, but device performance is affected and defects occur
Solution Approach 1:
By segmenting the surfactant into removable components via a cleavable linking group, the invention enables complete removal of the surfactant after it has performed its surface modification function. This ensures no residues remain to affect device performance or cause defects, while still maintaining processing efficiency.
Solution Approach 2:
The potential harm of surfactant residues is converted into a benefit by designing the surfactant with a cleavable linking group. The surfactant temporarily remains on the surface to perform its function, then is easily removed under controlled conditions, leaving no harmful residues. This approach maintains both processing efficiency and device reliability.
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 quick and complete removal of surfactants, reducing processing times, minimizing residual effects, and improving the quality of semiconductor substrates by preventing defects like pattern collapse and corrosion, thus enhancing device performance.
Implementation Method 1
subsequent thermal cleavage and easy removal of fragments
Data Source
AI summary
The use of an organic compound as cleavable additive, preferably as cleavable surfactant, in the modification and/or treatment of at least one surface of a semiconductor substrate is described. Moreover, it is described a method of making a semiconductor substrate, comprising contacting at least one surface thereof with an organic compound, or with a composition comprising it, to treat or modify said surface, cleaving said organic compound into a set of fragments and removing said set of fragments from the contacted surface. More in particular, a method of cleaning or rinsing a semiconductor substrate or an intermediate semiconductor substrate is described. In addition, a compound is described which is suitable for the uses and methods pointed out above and which preferably is a cleavable surfactant.