Patent ID: 8072774

Claim:
An apparatus, comprising: a substrate which includes an electronic component mounted on said substrate, said electronic component for processing a pair of signals, wherein said substrate comprises: a first wire for transmitting one of said signals, said first wire being formed on a first layer of said substrate; and a second wire for transmitting another one of said signals, said second wire being formed on a second layer of said substrate in a first region under said electronic component and being formed on a third layer in a second region of an other part of said first region, wherein said first layer and said second layer are formed between said third layer and a fourth layer, wherein said substrate comprises a first thickness between said first layer and said second layer so that a first impedance of each of said first wire and said second wire comprises a predetermined value, said first wire and said second wire being formed in said first region, wherein said substrate comprises a second thickness between said second layer and said third layer so that a second impedance of said second wire formed in said second region comprises said predetermined value, and wherein said substrate comprises a third thickness between said first layer and said fourth layer so that a third impedance of said first wire formed in said second region comprises said predetermined value.