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. 30, 2001
Filed:
Aug. 06, 1999
Edward J. Joehnk, Walnut Creek, CA (US);
Sergio E. Bravo, Alamo, CA (US);
Nutek Corporation, Hayward, CA (US);
Abstract
Irradiation of a target material disposed around a reel rotated about an axis perpendicular to the sweep of a beam of radiation produces a linear relationship between the depth into the target material and the radiation dose received. Where the core of the reel is sufficiently transparent to the radiation beam, target material located on the backside of the reel is also irradiated, creating a constant relationship between depth into the target material and the radiation dose received. The depth/dose profile can be tuned to a constant value by varying parameters of the irradiation process, such as target material thickness, target material density, reel diameter, and energy of the applied beam of radiation.