Invention Grant
US09401289B2 Semiconductor device and method of backgrinding and singulation of semiconductor wafer while reducing kerf shifting and protecting wafer surfaces 有权
半导体器件和半导体晶片的背面研磨和切割的方法,同时减少切屑移位和保护晶片表面

Semiconductor device and method of backgrinding and singulation of semiconductor wafer while reducing kerf shifting and protecting wafer surfaces
Abstract:
A semiconductor device has a semiconductor wafer with an interconnect structure formed over a first surface of the wafer. A trench is formed in a non-active area of the semiconductor wafer from the first surface partially through the semiconductor wafer. A protective coating is formed over the first surface and into the trench. A lamination tape is applied over the protective coating. A portion of a second surface of the semiconductor wafer is removed by backgrinding or wafer thinning to expose the protecting coating in the trench. A die attach film is applied over the second surface of the semiconductor wafer. A cut or modified region is formed in the die attach film under the trench using a laser. The semiconductor wafer is expanded to separate the cut or modified region of the die attach film and singulate the semiconductor wafer.
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