| 摘要 |
<p>PURPOSE:To reduce the thickness of a transformer, leakage flux and external magnetic effect by burying a Hall element in an insulating substrate, by printing the primary and the secondary coils on both the surfaces of the substrate and by shielding the circumference with a magnetic material. CONSTITUTION:A hole 1a is formed in an insulating substrate 1, coils 3 and 4 are formed around the hole 1a on both the surfaces of the insulating substrate 1, a Hall element 2 is buried upside down in the hole 1a and a lead wire 2c is fixed by soldering and after an adhesive 7 is coated on the surfaces of the coils 3 and 4, a film 8 wherein a magnetic material film 9 is formed on the external surface is pasted. A lead wire 3a is provided for the coil 3, a lead wire is also provided similarly for the coil 4 and both the surfaces of the main body 2a of the Hall element 2 are covered with a magnetic material 2b such as ferrite to easily induce magnetism.</p> |
