SURFACE PREPARATION OF DIE FOR IMPROVED BONDING STRENGTH

摘要

A surface preparation method for improved adhesion in an electronic package system. The method of improving adhesion in the electronic package system includes depositing a passivation layer on a bonding surface and roughening at least a portion of the passivation layer. A coating material is deposited on the passivation layer. The bonding surface can be part of a semiconductor or package substrate. The roughening process can be performed by a chemical or mechanical process. In another embodiment, an electronic package system includes a bonding surface of a semiconductor or package substrate. A passivation layer is deposited on the bonding surface and a portion of the passivation layer is roughened for improved adhesion. A coating material is deposited on the roughened portion of the passivation layer.