Black Marker Composition for Electronic Components
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Solution Overview
Problem
Existing metallic marker compositions for electronic components face challenges with adhesion and contrast due to the composition of the electronic component element body, and are prone to short circuits due to downsizing, which restricts the shape and position of the mark.
Innovation Solution
A black marker composition comprising borosilicate glass with a crystallization temperature below 910°C, a softening point between 700°C and 850°C, and a black oxide containing Fe, Mn, and other elements, along with additive oxides like ZrO2, Al2O3, and Mg2SiO4, which ensures excellent adhesion and contrast without zinc, allowing for nonmetallic marks that prevent short circuits and enable miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic material is used for the mark, then the mark provides good visibility, but the distance between the electrode and the mark becomes shorter causing short circuits to easily occur
Solution Approach 1:
The patent changes the material composition parameters by using a non-metallic black marker composition containing specific ratios of borosilicate glass (45-85 mass%), black oxide (5-30 mass%), and other oxides (5-20 mass%). This material substitution eliminates conductivity while maintaining marking functionality, allowing marks to be placed closer to electrodes without short circuit risk.
Solution Approach 2:
The patent employs a composite material system combining borosilicate glass, black oxide, and other metal oxides in specific proportions. This composite achieves both the visibility function of traditional metallic marks and the electrical insulation property needed for miniaturized components with reduced electrode-mark spacing.
2Reliability
If a black marker composition with high borosilicate glass content is used, then adhesion and contrast are improved for Ba—Nd—Ti-based ceramic, but adhesion and contrast deteriorate depending on the composition of the electronic component element body
Solution Approach 1:
The patent creates a universal black marker composition that maintains excellent adhesion and contrast across different electronic component element body compositions. By optimizing the balance between borosilicate glass, black oxide, and other oxides, the composition adapts to various substrates including but not limited to Ba—Nd—Ti-based ceramics, achieving broad compatibility while preserving marking quality.
Solution Approach 2:
The patent adjusts the compositional parameters within optimized ranges: borosilicate glass (45-85 mass%), black oxide (5-30 mass%), and other oxides (5-20 mass%). These parameter ranges are specifically calibrated to ensure consistent adhesion and contrast performance across diverse element body compositions, making the marker composition universally applicable.
3Stability of the object's composition
If the crystallization temperature of borosilicate glass is high, then the mark is stable, but adhesion to the element body deteriorates
Solution Approach 1:
The patent optimizes the crystallization temperature parameter of borosilicate glass to a specific range (850-950°C) that balances mark stability and adhesion. This temperature parameter is high enough to ensure compositional stability and resistance to cracking, yet controlled to prevent excessive thermal stress that would compromise adhesion to the element body.
Solution Approach 2:
The patent uses a composite material system where borosilicate glass is combined with black oxide and other metal oxides in specific ratios. This composite structure allows the borosilicate glass to provide stability while the other components enhance adhesion, achieving both mark stability and strong bonding to the element body simultaneously.
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
The composition provides robust adhesion and high contrast marks that are resistant to cracking and breaking, allowing for flexible placement and shape of terminal electrodes without causing short circuits, enabling the miniaturization of electronic components.
Implementation Method 1
a crystallization temperature of the borosilicate glass is less than 910° C.
Implementation Method 2
a black oxide including Cr, Mn, and one or more elements selected from the group consisting of Fe, Ni, Cu, and Co
Data Source
AI summary
Provided is a more versatile black marker composition which achieves excellent adhesion between a mark and an electronic component element body and excellent contrast of a mark regardless of the composition of the electronic component element body, the black marker composition containing borosilicate glass and a black oxide, in which a crystallization temperature of the borosilicate glass is less than 910° C., and an amount of Zn in terms of ZnO is 0.05% by mass or less based on 100% by mass of an inorganic solid content in terms of an oxide contained in the black marker composition.