Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Wafer-Level Packaging (WLP) refers to the technology of packaging an integrated circuit at wafer level. WLP is essentially a true chip scale package (CSP) technology, since the resulting package is practically of the same size as the die.. Wafer-level packaging has the ability to enable true integration of wafer fab, packaging, test, and burn-in at wafer level in order to streamline the manufacturing process undergone by a device from silicon start to customer shipment.