Patent ID: 7358153

Claim:
A method for cutting a junction board, comprising: providing a junction board comprising two bonded substrates, by bonding a second main surface of a first substrate having a first main surface provided with a plurality of chip areas and scribe areas demarcating a plurality of the chip areas from one another and the second main surface opposite to the first main surface, to a fourth main surface of a second substrate harder than the first substrate, having a third main surface and the fourth main surface opposite to the third main surface, said method further comprising steps of: (1) performing wet etching to create concave grooves in the junction board and expose the second main surface, the etching being performed at the third main surface on areas given by orthogonal projection of the scribe areas of the first main surface onto the third main surface; and (2) performing dicing using a dicing blade along the scribe areas of the first main surface until the exposed second main surface is reached, thereby to cut the junction board.