摘要:
[TECHNICAL PROBLEM]The present invention provides a surface-mount inductor allowing the Q to be improved at a higher frequency and preventing the efficiency of the inductor from getting worse even at the higher frequency.[SOLUTION TO THE PROBLEM]A surface-mount inductor comprises: a coil formed by winding a conductive wire; and a core containing the coil and formed by subjecting a mixture of a magnetic powder and a binder to powder-compacting. The magnetic powder contains plural types of magnetic powders each having a different particle size from the other, and the plural types of magnetic powders are mixed to satisfy the following relationship: Σan·Φn≦10 μm, where an is a mixing ratio, Φn is an average particle size, and n is an integer of 2 or more.
摘要:
[TECHNICAL PROBLEM]Present invention provides a surface-mount inductor allowing the Q to be improved at a higher frequency and preventing the efficiency of the inductor from getting worse even at the higher frequency.[SOLUTION TO THE PROBLEM]A surface-mount inductor comprises: a coil formed by winding a conductive wire; and a core comprising mainly of a magnetic powder and a resin and containing the coil therein. The magnetic powder contains plural types of magnetic powders each having a different particle size from others, and the plural types of magnetic powders are mixed to satisfy the following relationship: Σan·Φn≦10 μm, where an is a mixing ratio, Φn is an average particle size, and n is an integer of 2 or more.
摘要:
A method of producing a surface-mount inductor having an external electrode with high connection reliability even in a high-humidity environment is provided.The method comprises the steps of: forming a coil by winding an electrically-conductive wire having a self-bonding coating; forming a core portion using a sealant comprising metal magnetic powders and a resin so as to encapsulate the coil while allowing each of opposite ends of the coil to be at least partially exposed on a surface of the core portion; applying an electrically-conductive paste containing metal fine particles having a sintering temperature of 250° C. or less onto the surface of the core portion; and forming an underlying electrode on the surface of the core portion by sintering the metal fine particles through a heat treatment of the core portion to achieve electrical conduction with the coil.
摘要:
An object is to provide a highly reliable surface mount coil component quickly and reliably forming thermo-compression bonding on an occasion of thermo-compression bonding by a heater chip, and reliably fixing the metal plate terminal, in a surface mount coil component having thermo-compression bonding of a winding wire and a metal plate terminal. In a surface mount coil component including a winding wire 2, a core 1 and a metal plate terminal 3, the metal plate terminal 3 integrally includes a fixing part 3b which is bonded and fixed to the core 1, a joint part 3a to which an end of the winding wire is bonded by thermo-compression bonding, and a mount part 3c which is connected to an external circuit, the fixing part 3c is integrally included between the joint part 3a and the mount part 3b, and a sectional reduced portion 5 is formed between the joint part 3a and the fixing part 3b.
摘要:
Disclosed is a resin composition, which comprises a thermosetting resin contained therein in an amount of 40 volume % or more, and a wax contained therein in an amount of 5 to 30 volume %, wherein: the thermosetting resin exists in liquid form at room temperature; and the wax exists in powder form at room temperature and has a melting point of 70 to 150° C., and wherein the resin composition has a viscosity of 50000 to 150000 mPa.s as measured at room temperature.
摘要:
Disclosed is a resin composition, which comprises a thermosetting resin contained therein in an amount of 40 volume % or more, and a wax contained therein in an amount of 5 to 30 volume %, wherein: the thermosetting resin exists in liquid form at room temperature; and the wax exists in powder form at room temperature and has a melting point of 70 to 150° C., and wherein the resin composition has a viscosity of 50000 to 150000 mPa·s as measured at room temperature.
摘要:
Disclosed is a resin composition, which comprises a thermosetting resin contained therein in an amount of 40 volume % or more, and a wax contained therein in an amount of 5 to 30 volume %, wherein: the thermosetting resin exists in liquid form at room temperature; and the wax exists in powder form at room temperature and has a melting point of 70 to 150° C., and wherein the resin composition has a viscosity of 50000 to 150000 mPa·s as measured at room temperature.