Patent ID: 7065656
Filing Date: 2006-06-20
Classification: G06F,H01L

Abstract:
1. A tamper-evident and/or tamper-resistant electronic module comprising an electronic component, a tamper-evident and/or tamper-resistant sheet, and encapsulant material, said component being encapsulated in said encapsulant material, said sheet overlying said component, said sheet comprising a multi-layer sheet, said tamper-evident and/or tamper-resistant sheet being encapsulated in said encapsulant material, and said encapsulant material being opaque so that said tamper-evident and/or tamper-resistant sheet cannot be seen, a plurality of said layers of said sheet being selected from the groups: (i) an electromagnetic radiation shield layer; (ii) a tell-tale electrically conductive trip wire defining a convoluted meandering pathway on said layer, said trip wire meandering in a pattern which substantially covers said electronic component in a space filled area of said layer; (iii) a layer having the features of (ii), and in which the pathway comprises a fractal pattern; (iv) a layer having the features of (ii), and in which a second tell-tale trip wire extends alongside a first tell-tale trip wire so that they meander as a spaced pair. (v) an active electromagnetic masking emission layer adapted to emit electromagnetic radiation.