Patent ID: 7915140
Filing Date: 2011-03-29
Classification: H01L

Abstract:
1. A device fabrication method for dividing a wafer into individual devices along a plurality of crossing streets formed on a front side of said wafer, wherein said devices are respectively formed in a plurality of regions partitioned by said streets and a back side of each device is covered with an adhesive film for die bonding, said device fabrication method comprising: a kerf forming step of cutting the front side of said wafer along said streets by using a cutting blade to thereby form a plurality of kerfs along said streets, each kerf having a depth corresponding to the finished thickness of each device; a protective tape attaching step of attaching a protective tape to the front side of said wafer after performing said kerf forming step; a wafer dividing step of grinding a back side of said wafer to expose each kerf to the back side of said wafer after performing said protective tape attaching step, thereby dividing said wafer into said individual devices; an adhesive film mounting step of mounting an adhesive film on the back side of said wafer after performing said wafer dividing step; an adhesive film dividing step of applying a laser beam to said adhesive film along said kerfs after performing said adhesive film mounting step, thereby dividing said adhesive film along said kerfs; a wafer supporting step of attaching said adhesive film mounted on the back side of said wafer to a dicing tape supported on an annular frame and peeling off said protective tape from the front side of said wafer after performing said adhesive film dividing step; and a pickup step of peeling off each device with the accompanying adhesive film from said dicing tape.