Patent ID: 7161241
Filing Date: 2007-01-09
Classification: H01L,H05K

Abstract:
1. A multi-layer board comprising: a ceramic layer having a first side and a second side opposite said first side, said ceramic layer having a dielectric constant; an impedance element on said ceramic layer, said impedance element comprising a patterned inductor; a first resin layer on said first side of said ceramic layer so as to contact said ceramic layer, said first resin layer having a dielectric constant lower than said dielectric constant of said ceramic layer, and having a first side facing said ceramic layer and a second side opposite said first side; a second resin layer on said second side of said ceramic layer so as to contact said ceramic layer; a third resin layer on said first resin layer so as to contact said first resin layer; a strip line between said first resin layer and said third resin layer; and a ground pattern on said second side of said first resin layer, said ground pattern and said patterned inductor being arranged such that no portion of said ground pattern is located on said second side of said first resin layer opposite a portion of said first side of said first resin layer facing said patterned inductor.