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:
Mar. 31, 1998
Filed:
Jul. 09, 1996
Applicant:
Inventor:
Paul R Johannessen, Lexington, MA (US);
Assignee:
Megapulse, Inc., Bedford, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
361205 ; 361153 ; 307106 ; 307107 ;
Abstract
A relatively wide d.c. pulse generating system providing rise times normally attainable only with much narrower pulse width generation, comprising a plurality of sequentially operated groups of d.c. pulse generating modules achieving the combination of zero current SCR-switching and rapid magnetic switching and providing very high reliability and efficiency, and with the feature of continuously variable pulse width control and overall amplitude contouring, as for controlling applications such as plasma ion implantation where non-uniform contours of ion depth penetration normally would otherwise obtain.