Patent ID: 8039305

Claim:
A method for bonding semiconductor wafers, comprising: a first process of preparing a first semiconductor wafer including a functional surface and a plurality of first connector portions extending through the first semiconductor wafer in a thickness direction thereof and having functional surface side ends, and a second semiconductor wafer including a rear surface, a plurality of second connector portions extending through the second semiconductor wafer in a thickness direction thereof and having rear surface side ends and a plurality of solder bumps connected to the rear surface side ends of the second connector portions; a second process of interposing a bonding layer containing a flux-active curing agent and a thermosetting resin as constituent materials thereof between the first semiconductor wafer and the second semiconductor wafer and positioning themselves with alignment so that the functional surface side ends of the first connector portions correspond to the solder bumps connected to the rear surface side ends of the second connector portions, thereby producing a semiconductor wafer stacked body in which the first semiconductor wafer and the second semiconductor wafer are stacked together; and a third process of compressing the semiconductor wafer stacked body in a thickness direction thereof while heating it so that the first semiconductor wafer and the second semiconductor wafer are fixed together by melting and solidifying the solder bumps while curing the thermosetting resin, thereby producing a semiconductor wafer bonded body in which the first connector portions and the second connector portions are electrically connected together through solidified products obtained by melting and solidifying the solder bumps.