Micromechanical Part with Conductive Core for Static Discharge
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Solution Overview
Problem
Micromechanical parts in watchmaking, made from silicon or similar materials, suffer from static electricity accumulation on their surface, leading to suboptimal functioning, dust attraction, and potential physical deterioration due to electrostatic discharges, as they are typically coated with insulating materials that trap electrical charges.
Innovation Solution
A micromechanical part with a core made of high electrical conductivity semiconductor material, where the surface is partially devoid of the insulating coating to allow direct discharge, and optionally enhanced with a conductive coating or connector element for efficient charge release, utilizing doping and/or ion implantation to increase conductivity and employing a conductive glue for connection to the body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the micromechanical part is coated with an insulating material to improve tribological properties and thermal compensation, then the surface quality and precision are improved, but static electricity accumulates on the surface causing functional degradation and dust attraction
Solution Approach 1:
The patent applies local quality by creating a coating structure where only specific regions are coated with insulating material. The first region (active surface) remains uncoated or has reduced coating to allow electrostatic discharge, while the second region retains full insulating coating for tribological protection. This spatial differentiation resolves the contradiction by providing both functions in different locations.
Solution Approach 2:
The patent introduces an intermediary conductive element that facilitates electrostatic discharge from the uncoated first region to ground or a conductive path. This intermediary component enables the insulating coating to maintain its protective function while the conductive path provides a controlled discharge mechanism for static electricity.
2Reliability
If the entire surface is coated with insulating material to eliminate lubrication needs, then the tribological properties are improved, but electrostatic charges cannot dissipate causing violent discharges and physical deterioration
Solution Approach 1:
The patent divides the surface into two functional regions: a first region without full insulating coating that allows electrostatic discharge, and a second region with complete insulating coating that provides tribological protection. This local differentiation maintains reliability through lubrication-free operation while preventing electrostatic damage through controlled discharge paths.
3Ease of manufacture
If silicon is used as the core material to simplify manufacturing and improve precision, then the manufacturing complexity is reduced, but the material inherently accumulates static electricity when coated
Solution Approach 1:
The patent maintains silicon as the core material for manufacturing simplicity but applies the insulating coating only partially - specifically on a second region while leaving a first region uncoated or with reduced coating. This allows the silicon's manufacturing advantages to be preserved while the coating structure prevents electrostatic accumulation in the uncoated region.
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
Effectively eliminates static electricity issues by allowing easy discharge of electrical charges, preventing dust attraction and potential physical damage, while maintaining the advantages of silicon-based parts in precision and tribological properties.
Implementation Method 1
The electrical conductivity of an electrical semiconductor material is increased by doping and/or by ion implantation
Implementation Method 2
The electrical conductivity of an electrical semiconductor material is increased by doping and/or by ion implantation
Implementation Method 3
Thanks to a high electrical conductivity of the core, the electrical charges from the surface can pass through the coating to reach the semiconductor material
Implementation Method 4
Electrical insulators are materials that have no (or very few) free charges because most of the electrical charges are firmly trapped in the material. Therefore, an insulating material that is subjected to the action of an electromagnetic field will not conduct electricity
Data Source
Figure 1~4
Figure 5~6
AI summary
The micromechanical part (1) has a core (11) partially made of a semiconductor material having high electric conductivity, and a coating (12) made of an electrically insulating material such as diamond or silicon oxide, where the coating is provided on a surface of the core. The surface of the core is releasable from the coating so that an electrical discharge occurs between the core and an external body (2). The core includes an inner layer and an outer layer, where the electrical conductivity of the outer layer is greater than that of the inner layer. An independent claim is also included for a method for manufacturing a micromechanical part.