Vacuum Coating Target Conditioning and Substrate Pretreatment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coating methods face challenges in achieving reproducible results due to variations in target surface conditions and substrate preparation times, leading to inconsistent layer adhesion and increased production costs.
Innovation Solution
Simultaneously performing target conditioning and substrate pretreatment in a vacuum coating chamber, allowing the substrate to be partially nitrided and etched while the target is conditioned, without affecting the efficiency or homogeneity of the plasma etching process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If target conditioning is performed sequentially before substrate pretreatment, then layer adhesion is ensured, but total processing time increases significantly
Solution Approach 1:
The patent combines target conditioning and substrate pretreatment into a single simultaneous plasma process. The plasma chamber is used to condition the target surface while the same plasma environment performs pretreatment on the substrates, eliminating the need for sequential execution and reducing total processing time while maintaining adhesion quality
2Reliability
If plasma etching is performed to remove surface material and improve adhesion, then layer adhesion improves, but processing time increases
Solution Approach 1:
The patent merges the plasma etching step with the target conditioning step by conducting both operations simultaneously in the same plasma environment. This allows the substrate surface to be etched and activated for better adhesion without adding extra time, as both functions are achieved in parallel during the same process window
3Manufacturing precision
If the coating chamber is evacuated and then target conditioning is performed, then reproducible coating is achieved, but production efficiency decreases
Solution Approach 1:
The patent combines multiple process steps (target conditioning and substrate pretreatment) into a single simultaneous operation after chamber evacuation. This maintains the reproducible coating quality by ensuring proper target conditioning while improving productivity by eliminating the need for separate sequential steps
4Reliability
If substrate pretreatment is performed outside the coating chamber, then adhesion improves, but additional handling and time are required
Solution Approach 1:
The patent makes the coating chamber multi-functional by using it for both the pretreatment process and the subsequent coating deposition. The plasma environment serves dual purposes: activating the substrate surface for better adhesion and then depositing the coating layer, eliminating the need for separate external pretreatment equipment and handling steps
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 reduces overall processing time without compromising layer adhesion or product quality, enabling more efficient and reproducible coating operations.
Implementation Method 1
a coating source which includes a carrier as a material source and accelerates particles from the surface of the target towards the substrate
Implementation Method 2
subject the substrate surface to an etching process shortly before coating, preferably using plasma, i.e., a plasma etching process
Implementation Method 3
the pretreatment comprising a process step in which the workpieces are nitrided
Data Source
Figure 1~2
AI summary
The present invention relates to a method for coating workpieces, comprising the following steps: - loading a coating chamber with the workpieces to be coated; - closing and evacuating the coating chamber to a predetermined process pressure; - starting a coating source, which comprises a target as a material source, whereby particles are accelerated from the surface of the target in the direction of substrates, characterised in that a shield is provided between the target surface and the substrate until the target is conditioned, the substrates to be coated at least partially being subjected to a pretreatment in the meantime.