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:
Dec. 05, 2000
Filed:
Jul. 10, 1998
Dieter Ferling, Stuttgart, DE;
Fred Buchali, Waiblingen, DE;
Alcatel, Paris, FR;
Abstract
To protect the high frequency circuits arranged in a casing and which are operated at frequencies of >1 GHz to 100 GHz against inner electromagnetic perturbing radiation, the complete circuit (1) is equipped on both sides with a large area layer (3, 4) which absorbs electrical fluctuations. The layer (4), made from a material which absorbs electrical fluctuations, such as silicon with average conductivity, is arranged below the circuit carrier (1). The circuit carrier (1) with the components (5) is encapsulated by a dielectric material such as silicon sealing compound or epoxy resin. The layer (3) made from a sealing compound which absorbs electrical fluctuations, such as silicon filled with iron powder, is arranged above the encapsulated circuit carrier (1, 2).