Electronic Component Coil Land Electrode Exposure
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Solution Overview
Problem
In the manufacturing of electronic components, variations in cutting accuracy can lead to exposure defects of via conductors or land electrodes, which may be missed by appearance sorters, resulting in defective pieces passing through.
Innovation Solution
The electronic component design includes a multilayer body with a spiral coil conductor and land electrodes positioned outside the coil conductor, ensuring that the coil conductor is always exposed when a land electrode is exposed, facilitating easy detection of defects during the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If via electrodes or land electrodes are located outside the coil conductor to facilitate electrical connection, then ease of manufacture is improved, but the risk of exposure defects increases due to cutting accuracy variation
Solution Approach 1:
The patent positions the via electrode and land electrode at predetermined locations outside the coil conductor before the cutting process. This preliminary positioning ensures that even if cutting accuracy varies, the electrodes will be exposed on the cutting surface, allowing defects to be detected by appearance sorters before final product assembly.
2Ease of operation
If via electrodes are positioned outside the coil conductor for electrical connection, then electrical connectivity is improved, but detection precision of exposure defects deteriorates because small exposed areas are missed by appearance sorters
Solution Approach 1:
The patent pre-positions the via electrode and land electrode outside the coil conductor at locations that will necessarily be exposed during cutting. This preliminary arrangement ensures that the electrodes are in optimal positions for both electrical connectivity and defect detection by appearance sorters.
3Ease of operation
If land electrodes are located outside the coil conductor facing two sides of the rectangular shape, then ease of operation is improved, but manufacturing precision requirements increase to ensure proper positioning
Solution Approach 1:
The patent positions the land electrode to face two specific sides of the rectangular multilayer body, creating localized functional zones. This local quality approach allows the electrode to serve multiple connection purposes while maintaining clear positioning criteria that simplify manufacturing alignment.
Solution Approach 2:
The land electrode is pre-positioned outside the coil conductor at specific locations before cutting. This preliminary positioning establishes clear spatial relationships that guide subsequent manufacturing steps and ensure consistent electrical connectivity across production batches.
Data Source
AI summary
An electronic component includes a multilayer body obtained by laminating a plurality of insulator layers the shape of which is substantially rectangular in plan view, a coil conductor in a substantially spiral shape provided on an insulator layer, and a land electrode located outside the coil conductor. The land electrode faces two sides intersecting at a vertex of the substantially rectangular shape when viewed along a direction of laminating the insulator layers, and is electrically connected to an end portion of the coil conductor, in which a shortest distance from one side of the two sides to the land electrode is equal to or longer than a shortest distance from the coil conductor to the one side.