Patent ID: 6647614
Filing Date: 2003-11-18
Classification: H01C,H01L,Y10T

Abstract:
A method for changing an electrical resistance of a resistor, comprising:providing the resistor having a length L and a first electrical resistance R1; 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 of the length L, wherein at an end of the time of exposure the resistor has a second electrical resistance R2, wherein R2 is unequal to R1, wherein after completion of said exposing the portion of the resistor to the laser radiation for the time of exposure, the portion of the resister continues to be comprised by the resistor and contributes to the second electrical resistance R2, wherein the resistor in the providing step includes a first layer and a second layer, wherein the first layer comprises a first electrically conductive material, wherein the second layer comprises a second electrically conductive material, wherein the first layer is in electrically conductive contact with the second layer, and wherein the exposing step causes a portion of the first electrically conductive material to react with a portion of the second electrically conductive material to form a cell of a third electrically conductive material within the portion of the resistor.