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:
Jan. 29, 2019
Filed:
Nov. 21, 2017
Abb Schweiz Ag, Baden, CH;
Fabian Mohn, Ennetbaden, CH;
Paul Commin, Zürich, CH;
ABB Schweiz AG, Baden, CH;
Abstract
A semiconductor device comprises two electrodes with opposite faces; a semiconductor wafer sandwiched between the two electrodes; an outer insulating ring attached to the two electrodes and surrounding the semiconductor wafer; a middle insulating ring inside the outer insulating ring and surrounding the semiconductor wafer, whereby the middle insulating ring is made of a plastics material; and an inner insulating ring inside the middle insulating ring, whereby the inner insulating ring is made of ceramics and/or glass material. Either the middle insulating ring or the inner insulating ring has a tongue and the other thereof has a groove such that the tongue fits into the groove for their rotational alignment. The middle insulating ring and the inner insulating ring have a radial opening for receiving a gate connection of the semiconductor device.