Corner point lot qualification technique

Abstract

This paper describes a new approach in the sample make up for qualifying a new process, a process change, and, or a material change. This new approach, which we will refer to as the corner point lot method, produces a qualification sample that better represents the process operating window. The corner point lot method uses a design of experiment approach to purposely force critical parameters, as identified through Failure Mode and Effect Analysis (FMEA), to the corners of their spec limits.