公开(公告)号：US10141284B2

公开(公告)日：2018-11-27

申请号：US15604454

申请日：2017-05-24

申请人： IMEC VZW

发明人： Soon-Wook Kim ,  Lan Peng ,  Patrick Verdonck ,  Robert Miller ,  Gerald Peter Beyer ,  Eric Beyne

IPC分类号： H01L23/00 ,  H01L23/31 ,  H01L25/065 ,  H01L21/02 ,  H01L21/3105

摘要： The disclosed technology generally relates to semiconductor wafer bonding, and more particularly to direct bonding by contacting surfaces of the semiconductor wafers. In one aspect, a method for bonding a first semiconductor substrate to a second semiconductor substrate by direct bonding is described. The substrates are both provided on their contact surfaces with a dielectric layer, followed by a CMP step for reducing the roughness of the dielectric layer. Then a layer of SiCN is deposited onto the dielectric layer, followed by a CMP step which reduces the roughness of the SiCN layer to the order of 1 tenth of a nanometer. Then the substrates are subjected to a pre-bond annealing step and then bonded by direct bonding, possibly preceded by one or more pre-treatments of the contact surfaces, and followed by a post-bond annealing step, at a temperature of less than or equal to 250° C. It has been found that the bond strength is excellent, even at the above named annealing temperatures, which are lower than presently known in the art.

公开(公告)号：US20170301646A1

公开(公告)日：2017-10-19

申请号：US15604454

申请日：2017-05-24

申请人： IMEC VZW

发明人： Soon-Wook Kim ,  Lan Peng ,  Patrick Verdonck ,  Robert Miller ,  Gerald Peter Beyer ,  Eric Beyne

IPC分类号： H01L23/00

CPC分类号： H01L24/83 ,  H01L21/02065 ,  H01L21/02164 ,  H01L21/02167 ,  H01L21/02211 ,  H01L21/02274 ,  H01L21/31053 ,  H01L23/3192 ,  H01L24/03 ,  H01L24/05 ,  H01L24/08 ,  H01L24/32 ,  H01L24/80 ,  H01L25/0657 ,  H01L2224/03452 ,  H01L2224/03462 ,  H01L2224/03616 ,  H01L2224/03845 ,  H01L2224/03848 ,  H01L2224/05568 ,  H01L2224/05573 ,  H01L2224/05576 ,  H01L2224/05686 ,  H01L2224/08121 ,  H01L2224/08145 ,  H01L2224/32501 ,  H01L2224/80048 ,  H01L2224/80097 ,  H01L2224/80201 ,  H01L2224/80357 ,  H01L2224/80895 ,  H01L2224/80896 ,  H01L2224/80948 ,  H01L2224/83031 ,  H01L2224/83047 ,  H01L2224/83048 ,  H01L2224/83359 ,  H01L2924/00012 ,  H01L2924/0504 ,  H01L2924/00014 ,  H01L2924/20106 ,  H01L2924/2011

摘要： The disclosed technology generally relates to semiconductor wafer bonding, and more particularly to direct bonding by contacting surfaces of the semiconductor wafers. In one aspect, a method for bonding a first semiconductor substrate to a second semiconductor substrate by direct bonding is described. The substrates are both provided on their contact surfaces with a dielectric layer, followed by a CMP step for reducing the roughness of the dielectric layer. Then a layer of SiCN is deposited onto the dielectric layer, followed by a CMP step which reduces the roughness of the SiCN layer to the order of 1 tenth of a nanometer. Then the substrates are subjected to a pre-bond annealing step and then bonded by direct bonding, possibly preceded by one or more pre-treatments of the contact surfaces, and followed by a post-bond annealing step, at a temperature of less than or equal to 250° C. It has been found that the bond strength is excellent, even at the above named annealing temperatures, which are lower than presently known in the art.