Power Cycling Simulation by Radiant Heat
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
This article proposes that power cycling tests be performed by the use of radiant heat directly and uniformly impinging on chips or devices from a controllable heat source placed in their immediate vicinity while the rest of the substrate area is shielded from the heat by an insulating mask. In this manner the chip temperature will rise quickly while the heat to the substrate will have to travel by diffusion through the interconnections, thus building a thermal gradient across the joints as in the case of electrical power cycling. Generally, the fatigue of electronic components' joints is determined by electrical power-cycling. The power is applied to the chip cyclicly to induce fatigue failure of the joints.