Ceramic Housing Sintering for Uniform Color Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ceramic electronic device housings often exhibit non-uniform color distribution due to sintering processes, where pigments sublimate or evaporate, resulting in different colors at various depths, making it challenging to achieve a specified color at a desired depth after machining.
Innovation Solution
A method is developed to determine a sintering profile that achieves a selected color at a specific depth by testing multiple sintering profiles on ceramic housing samples, evaluating color changes with depth, and selecting the profile that produces the closest match to the target color with minimal variation, using techniques like two-stage sintering and pigment stabilization to ensure color consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a ceramic housing precursor is sintered using conventional sintering processes, then the housing is formed, but the pigments sublimate or evaporate causing non-uniform color distribution at different depths
Solution Approach 1:
The patent applies parameter changes by implementing a two-stage sintering process with controlled temperature profiles. The first stage sinters the ceramic material at a lower temperature to avoid pigment degradation, while the second stage completes the sintering at a higher temperature. This parameter optimization resolves the contradiction by achieving both color uniformity and structural integrity without pigment sublimation or evaporation.
2Shape
If material is removed from the housing to achieve a desired depth, then the housing shape is finalized, but the color may differ from the target color due to depth-related color variations
Solution Approach 1:
The patent applies preliminary action by pre-determining the sintering profile through testing on sample housings before manufacturing the final product. The process involves: (1) creating sample housings with pigments, (2) sintering samples with varying profiles, (3) removing material to target depths, (4) measuring colors, and (5) selecting the optimal profile. This preliminary testing ensures that when material is removed from the final housing, the resulting color matches the target color accurately.
3Measurement precision
If multiple sintering profiles are tested to find the optimal color match, then color precision is improved, but the manufacturing process complexity increases
Solution Approach 1:
The patent applies local quality by creating a standardized testing framework that evaluates sintering profiles locally on sample housings before applying the selected profile to production. The method systematically varies sintering parameters (temperature, time, atmosphere) on small samples, measures color outcomes at specific depths, and selects the optimal profile. This localized testing approach achieves high color matching accuracy without requiring complex real-time control during full production sintering.
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 ensures that ceramic housings have a uniform color across the exterior and interior surfaces, maintaining the desired color after machining, reducing color deviations and achieving perceptibly consistent colors across components.
Implementation Method 1
sintering a ceramic housing precursor in accordance with the determined sintering profile, thereby forming the housing
Implementation Method 2
pigments sublimate or evaporate
Implementation Method 3
pigments sublimate or evaporate
Data Source
AI summary
A method of manufacturing a housing of an electronic device includes determining a sintering profile configured to produce a selected color at a selected depth within a wall of the housing, sintering a ceramic housing precursor in accordance with the determined sintering profile, thereby forming the housing, and removing material from the housing up to the selected depth.