Laser Ablated Stencil Relief Layer Design
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Solution Overview
Problem
Existing methods for producing stencils limit relief heights and design freedom due to the narrowing of through-openings with increasing thickness, particularly in galvanic stencils, restricting the complexity and variety of patterns that can be applied.
Innovation Solution
The method involves using laser or plasma radiation to remove material from a non-metallic relief layer on a stencil body, creating through-openings that extend to the rear side, allowing for greater relief depths and design flexibility by varying the radiation power and introducing non-pattern-forming openings or perforations in plateau regions, which can differ from the carrier layer openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If galvanic production is used to create stencils with increased thickness for greater relief heights, then relief height is improved, but the through-openings become increasingly narrow which restricts further relief height increases
Solution Approach 1:
The patent replaces the galvanic (electrochemical) production method with laser ablation technology. This substitution allows for precise material removal without the constraint of narrowing through-openings, enabling relief heights of several millimeters while maintaining constant opening dimensions through computer-controlled laser processing
Solution Approach 2:
The invention changes the production method from galvanic to laser-based, fundamentally altering the parameters of material removal. This enables independent control of relief height and opening width, breaking the direct proportionality that existed in galvanic processes where opening size was tied to thickness
2Adaptability or versatility
If conventional production methods are used, then manufacturing process is simple, but design freedom for patterns is restricted
Solution Approach 1:
The patent replaces conventional mechanical and chemical production methods with laser ablation technology, enabling complex pattern creation through computer-controlled processing. This substitution provides unrestricted design freedom for geometric patterns while maintaining manufacturing efficiency through automated systems
Solution Approach 2:
The laser production method serves multiple functions: it can create various relief heights, produce different geometric patterns, and work with diverse materials (metal, plastic, ceramic, composite). This multi-functionality consolidates multiple specialized processes into a single versatile system
3Shape
If chemical etching or laser radiation is used to form relief in the upper side, then relief structure is created, but the through-openings become narrow with increasing thickness
Solution Approach 1:
The patent replaces chemical etching and conventional laser methods with a refined laser ablation process that selectively removes material from the upper side to create relief structures while preserving through-opening dimensions. The computer-controlled laser system enables precise material removal without the narrowing effect observed in previous methods
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 relief depths of up to several millimeters and increased design freedom for stencils, allowing for varied pattern formations and surface adaptations, such as inclined or graduated walls, and different surface properties through coatings, enhancing the versatility and effectiveness of stencil applications.
Implementation Method 1
material of the relief layer is subsequently removed in order to form the multiplicity of openings of the relief by means of laser or plasma radiation
Implementation Method 2
material of the relief layer is subsequently removed in order to form the multiplicity of openings of the relief by means of laser or plasma radiation
Data Source
AI summary
A method is provided for producing a stencil having a relief with multiple openings on its upper side. The contours correspond to a desired pattern and to a stencil of this type. The stencil has a body with at least one non-perforated non-metal relief layer, which allows greater relief heights and increased freedom of design. The relief layer is removed according to the pattern by laser or plasma radiation to form the multiple openings. Through-openings extending to a rear side opposite the upper side are provided at least in the bottom region of the openings of the relief. A stencil with a stencil body may be obtained, having at least one non-metal relief layer, formed in the upper side of which is a relief with multiple openings, the contours of which correspond to a desired pattern. Through-openings extending to a rear side opposite from the upper side are provided.