Semiconductor device and method for fabricating the same
3 Assignments
0 Petitions
Accused Products
Abstract
In a semiconductor device having a WCSP type construction package, to increase inductance without increasing further an area conventionally occupied by a coil. A pseudo-post part 27 comprising a magnetic body is extended in a direction perpendicular to a main surface 12a of a semiconductor chip 12, on a second insulating layer 21 of a WCSP 10. A first conductive part 15a and a second conductive part 15b constructed as square frames are respectively provided so as to surround the pseudo-post part, on respective top surfaces of a second insulation layer and a third insulating layer 22 which are separated parallel to each other, in an extension direction of the pseudo-post part. A coil 100 being a substantially spiral shape conductive path is formed from, the first conductive part, the second conductive part, and a connection part 26 which electrically connects the one ends of the first and second conductive parts.
27 Citations
24 Claims
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1-10. -10. (canceled)
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11. A semiconductor device, comprising:
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a semiconductor chip provided with a circuit element;
a coil provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip; and
a magnetic body provided on an upper side of said semiconductor chip, and surrounded by said coil, wherein said magnetic body extends along a main surface of said semiconductor chip, said coil forms a substantially spiral shaped conductive path which is wound along an extension direction so as to surround said magnetic body, said magnetic body is a substantially square column, said coil is provided with a first conductive part provided on a first plane parallel with a main surface of said semiconductor chip, a second conductive part provided on a second plane parallely separated in a perpendicular direction with respect to said main surface, and a connection part which electrically connects end parts of said first conductive part and said second conductive part, and said first conductive part, said second conductive part, and said connection part form a substantially spiral shaped conductive path. - View Dependent Claims (12, 18, 19)
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13-16. -16. (canceled)
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17. A semiconductor device, comprising:
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a semiconductor chip provided with a circuit element;
a coil Provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip;
a tabular first magnetic layer which is provided alone a surface substantially parallel with a main surface of said semiconductor chip, wherein the coil is formed substantially at a position opposing said first magnetic layer;
a tabular second magnetic layer, which is provided at a position facing said first magnetic layer with said coil therebetween; and
a passivation coating, which is provided as a the surface layer of said semiconductor chip, wherein one of said first magnetic layer and said second magnetic layer is covered with said passivation coating. - View Dependent Claims (22, 23)
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20. A method for fabricating a semiconductor device, which comprises a semiconductor chip provided with a circuit element;
- and a coil provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip, comprising;
forming, in a same process, a wiring layer, and a magnetic body on the upper side of said semiconductor chip, and at a position surrounded by said coil.
- and a coil provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip, comprising;
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21. A method for fabricating a semiconductor device, which comprises a semiconductor chip provided with a circuit element;
- and a coil provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip, comprising
forming a tabular first magnetic body along a surface substantially parallel with a main surface of said semiconductor chip, and forming a coil at a position opposing said first magnetic body. - View Dependent Claims (24)
- and a coil provided on an upper side of said semiconductor chip, which is packaged with a dimension effectively the same as an outer dimension of said semiconductor chip, comprising
Specification