Wiring Board Fine Line Mixing Prevention via Boundary Segmentation
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Solution Overview
Problem
Existing methods for manufacturing wiring boards struggle to prevent the blurring and mixing of adjacent fine and thick lines during the printing process, leading to reduced precision and quality.
Innovation Solution
A method involving a two-step process where a boundary line is formed using a material with the same composition as the fine line, corresponding to the outline of the thick line, and a main body portion with a different composition is formed, ensuring the boundary line's height is less than the main body portion's height and the fine line's width is less than the boundary line's width, thereby inhibiting the wet spreading of the thick line material and preventing mixing with the fine line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single printing process is used to form both fine lines and thick lines, then the manufacturing process is simple, but the ink blurs around wide print patterns and mixes with adjacent print patterns
Solution Approach 1:
The patent divides the printing process into two separate stages: a first printing process that forms fine lines and boundary lines, and a second printing process that forms the main body of thick lines. This segmentation prevents ink blurring and mixing by isolating the formation of fine features from thick features, thereby resolving the contradiction between process simplicity and line pattern precision.
Solution Approach 2:
The boundary line is formed in advance during the first printing process before the main body of the thick line is formed in the second printing process. This preliminary action creates a protective barrier that prevents the thick line ink from spreading into adjacent fine lines, thus maintaining manufacturing precision while keeping the overall process relatively simple.
2Device complexity
If the boundary line and main body portion have the same height, then the manufacturing process is simpler, but the shielding performance and electrical resistance control are insufficient
Solution Approach 1:
The patent applies different heights to different parts of the conductor structure: the boundary line has a first height while the main body portion has a second height greater than the first. This local differentiation optimizes both shielding performance (through the taller main body) and electrical resistance control (through the shorter boundary line), resolving the contradiction without significantly increasing overall structural complexity.
3Reliability
If the thick line material spreads freely, then the conduction path is larger improving conductivity, but the fine line and thick line mix together
Solution Approach 1:
The boundary line acts as an intermediary structure between the fine line and the main body of the thick line. It has the same material composition and height as the fine line, creating a transition zone that prevents the thick line material from directly contacting and mixing with the fine line, thereby maintaining line separation while allowing adequate conduction path formation.
Data Source
AI summary
A method is provided for manufacturing a wiring board that includes a conductor part including a first line and a second line wider than the first line. The method includes: a first process of forming the first line and a boundary line corresponding to at least a portion of an outline of the second line near the first line; and a second process of forming a remaining portion of the second line.