The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1992
Filed:
Oct. 23, 1990
Michel Calligaro, St Remy les Chevreuses, FR;
Thomson Hybrides et Microondes, Paris, FR;
Abstract
A microwave integrated circuit having planar and mesa components and microstrip lines and method of making the same is disclosed. To preserve a constant impedance for the microstrip lines, the mesa component is buried in a recess, which is then filled with a dielectric having substantially the same thermal expansion coefficient and the same dielectric constant as the insulating substrate. The surface of the mesa component and of the dielectric is in the plane of the planar part of the integrated circuit. Between the interconnecting microstrip lines on the planar face and the ground plane on the face of the substrate, the thickness and the dielectric constant of the material is constant.