Patent ID: 6862799

Claim:
A method for changing an electrical resistance of a resistor, comprising: providing the resistor having a length L and a first electrical resistance R 1 ; and exposing a portion of the resistor to a laser radiation for a time of exposure, wherein the portion of the resistor includes a fraction F or the length L, wherein at an end of the time of exposure the resistor has a second electrical resistance R 2 , and wherein R 2 is unequal to R 1 , and wherein after completion of said exposing the portion of the resistor to the laser radiation for the time of exposure, the portion of the resistor continues to be comprised by the resistor and contributes to the second electrical resistance R 2 , wherein the resistor in the providing step includes N layers denoted an layers 1, 2, . . . , N, wherein N is at least 2, wherein layer I includes an electrically conductive material M 1 for I=1, 2, . . . , N, wherein layer J is in electrically conductive contact with layer J+1 for J=1, 2, . . . , −1, wherein the exposing step causes a portion of the electrically conductive material M K to react with a portion of the electrically conductive material M K+1 to form an electrically conductive cell C K,K+1 within the portion of the resistor, and wherein K is selected from the group consisting of 1, 2, . . . , −1, and combinations thereof.