Patent ID: 8292159

Claim:
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 heating stage; (c) disposing the substrate above the semiconductor chips disposed over the first heating stage and thereafter bonding the semiconductor chips and the substrate to each other temporarily by thermocompression bonding while heating the semiconductor chips directly by the first heating stage; (d) after the step (c), disposing the temporarily bonded semiconductor chips and substrate onto a second heating stage adjacent to the first heating stage; and (e) pressurizing the semiconductor chips over the second heating stage for a longer time than in the first heating stage while heating the semiconductor chips directly by the second heating stage to effect a main bonding of the second heating stage, and to effect a main bonding of the semiconductor chips and the substrate by thermocompression bonding, wherein, prior to the step (b), a high pressure is applied to a plurality of pressure blocks which are supported each independently movably in corresponding relation to plural semiconductor chips, the high pressure being high to such an extent as the pressure blocks are not pushed up, then in this state the plural pressure blocks and the second heating stage are brought into contact with each other, and a point of change of a load imposed on a load change detecting means is detected by the load change detecting means to determine a landing height of the plural pressure blocks, the load change detecting means being connected to support block portions for supporting the pressure blocks.