Printing Pad Inclined Side Surface for Window Ink Transfer
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Solution Overview
Problem
The printing quality and reliability of patterns formed on electronic device windows using conventional printing pads are compromised due to distortion, leading to defects in the printing process.
Innovation Solution
The use of a printing pad with a side surface featuring a first pattern portion and a second pattern portion, where the first pattern portion has an inclination angle between 46 degrees and 90 degrees relative to the bottom surface, enhances the transfer of ink patterns onto the window, ensuring improved printing quality and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional printing pad with a flat side surface is used, then the manufacturing process is simple, but the ink pattern becomes distorted during transfer resulting in poor printing quality
Solution Approach 1:
The printing pad applies different geometric configurations to different regions: the first pattern portion uses an inclined quadrangular prism structure with specific inclination angles (45-90 degrees) to prevent distortion, while the second pattern portion uses a conventional flat structure. This localized differentiation allows the pad to achieve high printing quality where needed while maintaining simplicity elsewhere.
Solution Approach 2:
The invention transitions from a two-dimensional flat printing pad surface to a three-dimensional inclined structure. The inclined quadrangular prism configuration adds a dimensional element (inclination angle) to the printing pad geometry, enabling the pattern to be transferred without distortion while maintaining process simplicity.
2Reliability
If the printing pad structure is modified to improve printing quality, then printing reliability improves, but the device complexity increases
Solution Approach 1:
The printing pad structure differentiates between regions requiring high reliability (first pattern portion with inclined structure) and regions where conventional structures suffice (second pattern portion). This localized approach ensures printing reliability is improved only where necessary, avoiding unnecessary complexity throughout the entire device.
Solution Approach 2:
The invention modifies specific geometric parameters of the printing pad - specifically the inclination angle of the quadrangular prism (45-90 degrees) and the cross-sectional shape - to optimize pattern transfer reliability. These controlled parameter changes enhance printing reliability without fundamentally redesigning the entire printing pad system.
Data Source
AI summary
A method of manufacturing a window includes: providing an ink pattern to a printing pad; providing the printing pad and the ink pattern to a target substrate; and removing the printing pad from the target substrate, the ink pattern including: a first bezel line surrounding at least one hole; and a second bezel line surrounding the first bezel line, the printing pad including: a top surface; a bottom surface; and a side surface connecting the top surface and the bottom surface, the side surface including a first pattern portion, in which the first bezel line is formed, and a second pattern portion, in which the second bezel line is formed. The first pattern portion has an inclination angle equal to or greater than about 46 degrees and equal to or smaller than about 90 degrees based on the bottom surface of the printing pad.