Patent ID: 6121672
Filing Date: 2000-09-19
Classification: H01L

Abstract:
A radiation shield for an integrated circuit device to protect said device from damage caused by ionizing radiation, said integrated circuit device including a first surface being generally planar and a second surface being generally planar and opposing the first surface, said radiation shield comprising:a shielding material for absorbing ionizing radiation;a lower surface being generally planar and in contact with the first surface;a central portion positioned in substantial registration with the first surface, said central portion including a first upper surface and having a first thickness as measured from said first upper surface to said lower surface;a distal portion located about said central portion, said distal portion including a second upper surface and having a second thickness as measured from said second upper surface to said lower surface, wherein said second thickness is less than said first thickness; and,a transitional portion including a third upper surface forming a continuation of said first and second upper surfaces, said third upper surface positioned relative the integrated circuit device such that a minimum thickness between said third upper surface and said lower surface is about equal to said first thickness, as measured from an edge of said second surface, closest said third upper surface.