NONDESTRUCTIVE OPTICAL DETECTION OF TRACE UNDERCUT, WIDTH AND THICKNESS

摘要

Some example forms relate to a method of nondestructively measuring a geometry of an electrical component on a substrate. The method includes directing light at the electrical component. The light is at an original intensity. The method further includes measuring light that is reflected off of the electrical component. The reflected light includes undiffracted light and diffracted light. The diffracted light is at a diffracted intensity. The method further includes determining a ratio of diffracted intensity to original intensity and utilizing the ratio to determine a geometry of the electrical component.