Patent ID: 6525623
Filing Date: 2003-02-25
Classification: H01P,H05K

Abstract:
A multi-layer circuit comprising:a first transmission line having a bottom dielectric layer and a middle dielectric layer arranged in a vertically stacked structure, the bottom and middle dielectric layers each having top and bottom surfaces, a conductive pattern disposed between the bottom surface of the middle dielectric layer and the top surface of the bottom dielectric layer, and a bottom ground layer in contact with the bottom surface of the bottom dielectric layer; and a second transmission line arranged in a vertically stacked relationship above said first transmission line, the second transmission line having a top dielectric layer having top and bottom surfaces, a conductive pattern in contact with the top surface of the top dielectric layer and at least one ground layer separating the bottom surface of the top dielectric layer and the top surface of the middle dielectric layer, wherein electrical connection is established between the first and second transmission lines by at least one plated through hole extending through the second transmission line, and each of the dielectric layers comprises a ceramic-filled substrate with woven glass reinforcement.