Chip inductor and method for manufacturing the same
First Claim
1. A chip inductor comprising:
- a chip main body and a pair of external connection electrodes, the chip main body including a substrate and a laminate including plural conductor patterns and plural insulating layers alternately laminated on the substrate, each conductor pattern including turns, the plural conductor patterns are connected to each other in series in a lamination direction thereof so as to constitute a coil, one of the external connection electrodes attached to one side-end surface of the chip main body and connected to one end of the coil, and the other external connection electrode attached to the other side-end surface of the chip main body and connected to the other end of the coil;
whereinouter diameter dimensions of the plural conductor patterns constituting the coil are substantially equal; and
a thickness of the laminate body and a thickness of the substrate are substantially equal, so that a lowermost-layer conductor pattern is located substantially in a midsection of the chip main body;
the lowermost-layer conductor pattern is the conductor pattern having the largest number of turns, and a number of turns of the other plural conductor patterns are substantially equal to each other; and
the number of turns of the lowermost-layer conductor pattern is about 1.5 turns, and the number of turns of the other conductor patterns is about 1 turn.
1 Assignment
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Accused Products
Abstract
A chip inductor is constructed by alternately laminating plural conductor patterns and plural insulating layers on and above a ceramic substrate, and connecting the plural conductor patterns to each other in series in a lamination direction thereof so as to constitute a coil. Specifically, the number of turns of the lowermost conductor pattern disposed directly on the ceramic substrate is larger than the number of turns of the other plural conductor patterns and the number of turns of the other plural conductor patterns are substantially equal to each other. Preferably, the number of turns of the lowermost conductor pattern is about 1.5 times the number of turns of the other plural conductor patterns.
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Citations
12 Claims
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1. A chip inductor comprising:
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a chip main body and a pair of external connection electrodes, the chip main body including a substrate and a laminate including plural conductor patterns and plural insulating layers alternately laminated on the substrate, each conductor pattern including turns, the plural conductor patterns are connected to each other in series in a lamination direction thereof so as to constitute a coil, one of the external connection electrodes attached to one side-end surface of the chip main body and connected to one end of the coil, and the other external connection electrode attached to the other side-end surface of the chip main body and connected to the other end of the coil;
whereinouter diameter dimensions of the plural conductor patterns constituting the coil are substantially equal; and a thickness of the laminate body and a thickness of the substrate are substantially equal, so that a lowermost-layer conductor pattern is located substantially in a midsection of the chip main body; the lowermost-layer conductor pattern is the conductor pattern having the largest number of turns, and a number of turns of the other plural conductor patterns are substantially equal to each other; and the number of turns of the lowermost-layer conductor pattern is about 1.5 turns, and the number of turns of the other conductor patterns is about 1 turn. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for manufacturing a chin inductor comprising the steps of:
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alternately repeating a step of forming a conductor pattern and a subsequent step of forming an insulating layer a plurality of times on a ceramic substrate or a wafer so as to form a chip main body, each conductor pattern including turns; connecting the plural conductor patterns to each other in series in a lamination direction thereof so as to produce a chip inductor including a coil; forming a number of turns of a lowermost-layer conductor pattern to be larger than a number of turns of the other plural conductor patterns; and forming the number of turns of the other plural conductor patterns to be substantially equal to each other;
whereinthe number of turns of the lowermost-layer conductor pattern is about 1.5 turns, and the number of turns of the other plural conductor patterns is about 1 turn. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification