Abstract: The cover according to the invention serves to encapsulate microsystems, wherein the cover comprises or is made of one or more cover units, and at least one cover unit comprises at least one first recess caused by deformation and bounded at least partially by at least one optical window, the quadratic surface roughness thereof being less than or equal to 25 nm. The invention further relates to a method for producing optical components, wherein the method is particularly also suitable for producing a cover according to the invention allowing encapsulation at the wafer level.
Type:
Grant
Filed:
February 13, 2009
Date of Patent:
August 27, 2013
Assignee:
Fraunhofer-Gesellschaft zur Foerferung der angewandten Forschung e.V.
Inventors:
Hans Joachim Quenzer, Marten Oldsen, Ulrich Hofmann
Abstract: The invention involves a control circuit for a switch unit of a clocked power supply circuit, the switch unit being designed to effect input-side excitation of a resonant transformer arrangement, and comprises an input for receiving an auxiliary signal from the resonant transformer arrangement. The invention also includes a resonance converter that enables independent control of frequency and turn-on moments, or duty cycle, and thus enables a particularly efficient operation of the resonance converter, and a particularly precise regulation.
Type:
Grant
Filed:
May 18, 2006
Date of Patent:
June 29, 2010
Assignees:
Infineon Technologies AG, Fraunhofer-Gesellschaft zur Foerferung der Angewandten Forschung E.V.
Inventors:
Matthias Radecker, Fabio Bisogno, Michael Herfurth