Strip testing plays a crucial role in semiconductor device fabrication. It refers to the process of semiconductor devices getting electrically tested while they are still in their lead frame strips. Strip testing encourages parallel testing of numerous units simultaneously, increasing test throughput and decreasing test cycle period. This helps hasten the test process without sacrificing efficiency and effectivity. No wonder why a silicon wafer supplier utilizes this process. In this article, we will discuss the process of strip testing and its benefits.
Strip testing is also referred to as matrix testing. It promotes the side-by-side testing of multiple units at the same time. This helps hasten the process, increase the output, and reduce test cycle time. After strip testing, the usual end-of-line operations are done, like device singulation, vision sort, take and reel, packing, labeling, and shipping.
Strip testing is a new test process that cannot be applied to all semiconductor packages. In traditional semiconductor fabrication, a silicon wafer supplier assembles and packages semiconductors separate from testing. Both processes are usually done after the units have been tested. But with strip testing, the process is inserted within the assembly process. This means that the birth of strip testing ended the age of keeping assembly separated from testing.
Strip testing grants many benefits, especially regarding recent advances in semiconductor manufacturing technologies. Micro packages are hard to handle, process, and test separately but using an integrated assembly/ test process that involves strip testing can help keep these micro packages all in one piece in their lead frame strips for most of the manufacturing process, removing direct handling of the units until they are singulated. This helps avoid handling-related issues like package cracks, bent leads, missing units, ESD damage, and more. Aside from giving a more protected environment for the units, strips are also easier to manage and process than single devices.