Patent ID: 7156315
Filing Date: 2007-01-02
Classification: B01J,B01L,C12Q,C40B,G01N,G02B,H05H,Y10T

Abstract:
1. A chip or wafer bearing a coded identifier, wherein the identifier comprises a matrix of unique random arrays of encoded particles, wherein each of the unique random arrays occupies a discrete position within the matrix, provided that a given position of the matrix may or may not be occupied, wherein each of the unique random arrays comprises: a plurality of particles forming a fixed array wherein each particle is associated with a label, and wherein different particles may have the same or a different label, and wherein the random array comprises at least about 25 particles and three different labels; and wherein the coded identifier permits the chip or water to be uniquely identified from other chips or wafers which bearing coded identifiers having different positions in the matrix occupied or unoccupied, and/or different unique random arrays of encoded particles.