Patent ID: 6455880
Filing Date: 2002-09-24
Classification: H01L,H01P

Abstract:
A high frequency semiconductor device comprising:a substrate; a first metal layer configured to form a high frequency transmission line and disposed above the substrate, the first metal layer including: 1) a first metal strip; and 2) first and second ground metal plates sandwiching the first metal strip, each being isolated from the first metal strip; a first dielectric thin film disposed at least above a part of said first ground metal plate so that a thin extension part of the first dielectric thin film covers a surface of the first metal strip; and a second metal layer comprising a second metal strip, disposed on said first dielectric thin film, wherein a thickness of the first dielectric thin film above said first metal strip is smaller than the thickness of the first dielectric thin film between the second metal strip and the first ground metal plate.