Method of fabrication of semiconductor integrated circuit device
View Patent ↗Productivity is to be improved in assembling a semiconductor integrated circuit device. A matrix substrate is provided and semiconductor chips are disposed on a first heating stage, and then the matrix substrate is disposed above the semiconductor chips on the first heating stage. Subsequently, the semiconductor chips and the matrix substrate are bonded to each other temporarily by thermocompression bonding, while heating the chips directly by the first heating stage. Thereafter, the temporarily bonded matrix substrate is disposed on a second heating stage adjacent to the first heating stage, and then, on the second heating stage, the semiconductor chips are thermocompression-bonded to the matrix substrate, while being heated directly by the second heating stage.
1. A method of fabricating a semiconductor integrated circuit device, comprising the steps of:
(a) providing an organic wiring substrate;
(b) disposing a plurality of semiconductor chips over a first stage;
(c) disposing the substrate at first main surface sides of the semiconductor chips over the first stage and bonding the semiconductor chips and the substrate to each other temporarily by thermocompression bonding while heating the semiconductor chips from the second main surface sides of the chips over the first stage;
(d) after the step (c), disposing the temporarily bonded semiconductor chips and substrate over a second stage adjacent to the first stage; and
(e) pressurizing the semiconductor chips over the second stage for a longer time than in the first stage while heating the semiconductor chips from the second main surface sides of the chips to effect a main bonding of the semiconductor chips and the substrate by thermocompression bonding, wherein the heating of the semiconductor chips from the second main surface sides of the chips over the second stage is performed directly without interposition of the organic wiring substrate.
2. A method according to claim 1 , wherein the plural semiconductor chips are disposed over the second stage and are subjected all together to a main bonding to the substrate by the thermocompression bonding while being heated directly by the second stage.
3. A method according to claim 1 , wherein the organic wiring substrate is a multi-layer wiring substrate.
4. A method according to claim 3 , wherein the temperature of the heating of the semiconductor chips from the second main surface sides of the chips over the second stage is lower than the glass transition temperature of an organic resin which constitutes a principal portion of the organic wiring substrate.
5. A method according to claim 1 , wherein the bonding between the semiconductor chips and the substrate is performed through an organic layer lower in modulus of rigidity than an organic resin which constitutes a principal portion of the substrate.