Method of manufacturing chip-type common mode choke coil
First Claim
1. A method for manufacturing a chip type common mode choke coil, said method comprising the steps of:
- (a) forming a stack of green sheets including;
(1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and
(2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops;
(b) forming core receiving holes through both said lamination and said magnetic layers in the area of said center loops after said stack has been formed; and
(c) inserting magnetic material into said core receiving holes.
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Accused Products
Abstract
In a chip type common mode choke coil, a plurality of non-magnetic sheets on which conductor lines are formed are laminated one on another to form a non-magnetic member, and the conductor lines are connected to form primary and secondary coils inside the non-magnetic member, and a pair of magnetic layers are formed on the upper and lower surface of the non-magnetic member, and magnetic cores are arranged substantially at the centers of the loops of the coils in such a manner that they penetrate the non-magnetic member and are connected to the pair of magnetic layers, whereby a closed magnetic path crossing the primary and secondary coils is formed.
38 Citations
20 Claims
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1. A method for manufacturing a chip type common mode choke coil, said method comprising the steps of:
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(a) forming a stack of green sheets including; (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) forming core receiving holes through both said lamination and said magnetic layers in the area of said center loops after said stack has been formed; and (c) inserting magnetic material into said core receiving holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for manufacturing a chip type common mode choke coil, said method comprising the steps of:
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(a) forming a stack of green sheets including; (1) a lamination including a plurality of non-magnetic sheets each having conductive lines printed thereon, said conductive lines being coupled together and having a shape which will form primary and secondary coils having respective center loops; and (2) first and second magnetic layers located on a top and a bottom surface of said lamination, respectively, and extending over said center loops; (b) placing a magnetic member on the top of said first magnetic layer and extending over the area of said center loops to form an assembly including said stack of green sheets and said magnetic member; and (c) using a punch assembly to substantially simultaneously; (1) form core receiving holes through said assembly in the area of said center loops; and (2) insert magnetic material from said magnetic member into said core receiving holes. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification