Anti-counterfeiting opto-thermal watermark for electronics

Patent metadata

Field	Value
Publication number	US-9296246-B2
Application number	US-201314102664-A
Country	US
Kind code	B2
Filing date	Dec 11, 2013
Priority date	Aug 30, 2013
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

An anti-counterfeiting technique presents, to a test thermoreflective mark at a first temperature, a first electromagnetic wave. A first test reflective profile for the test thermoreflective mark associated with the first temperature is recorded. A second electromagnetic wave is presented to the test thermoreflective mark at a second temperature. A second test reflective profile for the test thermoreflective mark associated with the second temperature is recorded. The first test reflective profile is compared with a first control reflective profile that is associated with a genuine thermoreflective mark. The second test reflective profile is compared with a second control reflective profile that is associated with the genuine thermoreflective mark.

First claim

What is claimed is:

1. A method for authenticating an item having a thermoreflective mark, the method comprising:
presenting, to the thermoreflective mark at a first temperature, a first electromagnetic wave, wherein the thermoreflective mark has a pattern and a temperature sensitive coating;
recording a first reflective profile produced from said presenting the first electromagnetic wave to the thermoreflective mark at the first temperature;
presenting, to the thermoreflectiv…

Assignees

• IBM

Inventors

• Cruz Ethan E
• Harper Michael W
• Kruse Ryan M
• Moore Arden L
• Veraa Brian G

Classifications

• B42D25/36 Primary

  Operations & Transport · mapped topic

• B42D25/20

  Operations & Transport · mapped topic

• G06K9/00046

  Physics · mapped topic

• G06V40/1324

  Physics · mapped topic

• B42D25/313 Primary

  Operations & Transport · mapped topic