Patent ID: 6914509

Claim:
A printed circuit transformer comprising: a first wiring layer; a second wiring layer formed under and parallel to the first wiring layer; a primary coil comprising: a first conductive trace formed on the first wiring layer; a second conductive trace formed on the second wiring layer; a third conductive trace formed on the first wiring layer and parallel to the first conductive trace; a fourth conductive trace formed on the second wiring layer and parallel to the second conductive trace; a first via plug connected to a first end of the first conductive trace and a first end of the second conductive trace; a second via plug connected to a second end of the second conductive trace and a first end of the third conductive trace; and a third via plug connected to a second end of the third conductive trace and a first end of the fourth conductive trace; and a secondary coil comprising: a fifth conductive trace formed on the first wiring layer and parallel to the first conductive trace; a sixth conductive trace formed on the second wiring layer and parallel to the second conductive trace; a seventh conductive trace formed on the first wiring layer and parallel to the third conductive trace; an eighth conductive trace formed on the second wiring layer and parallel to the fourth conductive trace; a fourth via plug connected to a first end of the fifth conductive trace and a first end of the sixth conductive trace; a fifth via plug connected to a second end of the sixth conductive trace and a first end of the seventh conductive trace; and a sixth via plug connected to a second end of the seventh conductive trace and a first end of the eighth conductive trace.