Abstract:
PROBLEM TO BE SOLVED: To prevent facing second and third flat surface spiral conductors from contacting with each other.SOLUTION: A coil component 1 includes: flat surface spiral conductors 11a, 11b respectively formed on a front surface 2at and a rear surface 2ab of a substrate 2a by electrolytic plating; flat surface spiral conductors 11c, 11d respectively formed on a front surface 2bt and a rear surface 2bb of a substrate 2b by electrolytic plating; and an insulation resin layer 21 provided between the flat surface spiral conductor 11b and the flat surface spiral conductor 11c.
Abstract:
PROBLEM TO BE SOLVED: To provide a thin and compact high performance transformer component.SOLUTION: A transformer component 10 comprises a ferrite substrate 11, a first coil L1 formed on the ferrite substrate 11, a printed circuit board 16 with a central opening superimposed on the ferrite substrate 11, a second coil L2 formed on the printed circuit board 16, and a magnetic body 19 provided in the opening 16a of the printed circuit board 16 and configuring a magnetic path common to the first and second coils L1, L2. The number of turns of the first coil is larger than that of the second coil, and the second coil is thicker than the first coil.
Abstract:
PROBLEM TO BE SOLVED: To provide a highly reliable terminal electrode on the outer surface of a chip precisely in an arbitrary position and shape. SOLUTION: A manufacturing method of electronic components comprises: a tentative adhesion process for tentatively adhering (for example, vacuum-pressing) a first surface of a substrate to a support plate via an adhesive sheet (for example, made of resin dissolved in a solvent); a substrate dividing process for forming a groove for dividing a substrate into individual chips by forming a notching reaching one portion of the thickness of the support plate from a second surface side at a side opposite to the first surface on the substrate; a continuous electrode formation process for forming a continuous electrode on a second surface and on the circumferential face of a chip positioned in the groove by sputtering; and a component separation process (for example, for applying ultrasonic waves by dipping into a solvent) for separating the chip from the support plate. Before the tentative adhesion process, a first surface electrode formation process for forming an electrode on the first surface of the substrate is further included. In the continuous electrode formation process, an electrode formed on the circumferential face of electronic components is connected to an electrode formed in a first surface electrode formation process. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a planar coil element manufacture of which is facilitated by an easy-to-handle resin, and to provide a manufacturing method therefor.SOLUTION: In a planar coil element 10 and a manufacturing method therefor, a metal magnetic powder-containing resin 20 containing a flat or acicular first metal magnetic powder 30 further contains a second metal magnetic powder 32 having an average particle diameter (1 μm) smaller than that (32 μm) of the first metal magnetic powder 30, and thereby the viscosity of the metal magnetic powder-containing resin 20 decreases significantly. Consequently, the metal magnetic powder-containing resin 20 can be handled easily when it is applied and shaped to surround a coil 19, thus facilitating manufacture of the planar coil element 10.
Abstract:
PROBLEM TO BE SOLVED: To improve magnetic coupling between primary winding and secondary winding in a transformer component where multiple printed substrates, each of which is provided with a spiral conductor, are laminated.SOLUTION: A transformer component includes printed substrates 20, 40 in which spiral conductors 21, 41 serving as primary winding are formed and printed substrates 10, 30 in which spiral conductors 11, 31 serving as secondary winding are formed. The printed substrates 10, 20 are laminated so that the spiral conductors 11, 21 are disposed facing each other, and the printed substrates 30, 40 are laminated so that the spiral conductors 31, 41 are disposed facing each other. This structure improves magnetic coupling between the primary winding and the secondary winding. Thus, a transformer component with less transmission loss is provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a coil component which allows for enhancement of inductance while suppressing increase in core loss.SOLUTION: A coil component 1 comprises: a substrate 2; planar spiral conductors 10a, 10b formed, respectively, on the front surface 2t and the back surface 2b of the substrate 2 by electrolytic plating; and a metal magnetic powder-containing resin 22 covering the planar spiral conductors 10a, 10b, respectively. The metal magnetic powder-containing resin 22 contains first metal powder having a first average grain size, second metal powder having a second average grain size smaller than the first average grain size, and third metal powder having a third average grain size smaller than the second average grain size. The first average grain size is 15-100 μm, and the third average grain size is 2 μm or less. The first metal powder is a Permalloy-based material, and the second third metal powders are carbonyl iron.
Abstract:
PROBLEM TO BE SOLVED: To prevent conductors excluding lead out conductors from exposing on a side surface of a coil component cut off by dice cutting.SOLUTION: In a coil component formation process, through holes for embedding conductors are respectively formed in first to seventh rectangular regions A1 to A7, and flat surface spiral conductors, covering the through holes for embedding the conductors at inner peripheral ends, are formed on a front surface 2t of a substrate for the respective rectangular regions. Further, in a region where each corner of the first and fourth rectangular regions A1 to A4 gathers, a lead out conductor 11a, connecting with each outer peripheral end of the four flat surface spiral conductors corresponding to these four rectangular regions, is formed. Flat surface spiral conductors, covering the through holes for embedding the conductors at inner peripheral ends, are formed on a rear surface 2b of the substrate for the respective rectangular regions. Further, in a region where each corner A1, A5 to A7 of the first and fifth to seventh rectangular regions A1, A5 to A7 gathers, a lead out conductor 11b, connecting with each outer peripheral end of the four flat surface spiral conductors corresponding to these four rectangular regions, is formed.
Abstract:
PROBLEM TO BE SOLVED: To provide a planar coil element achieving intensity and magnetic permeability at the same time.SOLUTION: In a planar coil element 10, a coil part 19 has a magnetic core part 21 in which metal magnetic powder containing resin 20 includes a first metal magnetic powder 30. Proportion of tilting metal magnetic powder in the first metal magnetic powder 30 is greater in the core part 21 than outside of the core part 21, and in most of the first metal magnetic powder 30 in the core part 21, major axes thereof tilt against a thickness direction and a surface direction of a board 16. Therefore, intensity in the planar coil element 10 is increased comparing to one in a planar coil element 110 in Fig. 9 (a), and magnetic permeability in the planar coil element 10 is also increased comparing to one in a planar coil element 210 in Fig. 9 (b). Thus, the planar coil element is provided with achieving intensity and magnetic permeability on a high level at the same time.
Abstract:
PROBLEM TO BE SOLVED: To prevent the outmost periphery of a flat surface spiral conductor from exposing on a side surface of a coil component.SOLUTION: A coil component 1 includes: a substrate 2; a flat surface spiral conductor 10a formed on a front surface 2t of the substrate 2 by electrolytic plating; and a flat surface conductor 15a which is formed between the outermost periphery of the flat surface spiral conductor 10a and an end part of the substrate 2, from among the front surface 2t of the substrate 2, and is not connected with other conductors on at least the same plane. The flat surface conductor 15a inhibits a plating layer of the outermost periphery from growing in the lateral direction. Thus, the structure prevents the outmost periphery of the flat surface spiral conductor from exposing on a side surface of the coil component.