Semiconductor device and manufacturing method thereof

1. A method for manufacturing a semiconductor device, comprising:

supplying an adhesive for bonding an electronic component which has a plurality of bumps with a substrate which has a plurality of bonding pads corresponding to the bumps, to at least a portion of the substrate, between the electronic component and the substrate,

flow-casting the adhesive on the substrate by a flow-casting unit, in such a manner that the expression S 1 /S 0 >1 is satisfied, where S 0 is the total contact surface area with the substrate of the adhesive supplied to the substrate, and S 1 is the total contact surface area with the substrate of the adhesive after the flow-casting, and

curing the adhesive while making the adhesive contact with the electronic component and the substrate in a state where the bumps are abutted against the bonding pads.

2. The method for manufacturing a semiconductor device according to claim 1 , wherein the supplying step supplies the adhesive to the substrate in any one of aspects of a continuous form or a non-continuous form.

3. The method for manufacturing a semiconductor device according to claim 1 , wherein the flow-casting unit is configured to eject a compressed gas.

4. The method for manufacturing a semiconductor device according to claim 3 , wherein the ejection of the compressed gas is performed by any one of continuous ejection and pulse ejection.

5. The method for manufacturing a semiconductor device according to claim 4 , wherein the flow-casting unit is configured to alter an ejection pressure of the compressed gas.

6. The method for manufacturing a semiconductor device according to claim 3 , wherein the compressed gas is heated.

7. The method for manufacturing a semiconductor device according to claim 1 , wherein the flow-casting of the adhesive is halted by a flow-casting halting unit in such a manner that the adhesive does not extend beyond the mounting region of the electronic component on the substrate.

8. The method for manufacturing a semiconductor device according to claim 1 , wherein the flow-casting unit has a shape of any one of a sphere, a bar and a plate.

9. The method for manufacturing a semiconductor device according to claim 8 , wherein at least the surface of the flow-casting unit which contacts with the adhesive is composed of a fluorine resin.

10. The method for manufacturing a semiconductor device according to claim 1 , wherein the flow-casting unit is swingable in a direction parallel to the surface of the substrate.

11. The method for manufacturing a semiconductor device according to claim 1 , further comprising heating of the adhesive in at least any one of the supplying step and the flow-casting step.

12. The method for manufacturing a semiconductor device according to claim 1 , further comprising another supplying step after the flow-casting step.

13. The method for manufacturing a semiconductor device according to claim 1 , wherein the curing of the adhesive is carried out by heating the adhesive.

14. The method for manufacturing a semiconductor device according to claim 1 , wherein the abutment between the bumps and the bonding pads is performed by aligning the bumps in positions for abutment with the bonding pads, by a bonding tool which holds by suction the electronic component.

15. The method for manufacturing a semiconductor device according to claim 14 , wherein the bonding tool holds by suction the electronic component via a member which has non-adhesive properties with respect to the adhesive, and applies a pressure to the adhesive via the member having non-adhesive properties.

16. The method for manufacturing a semiconductor device according to claim 15 , wherein the member having non-adhesive properties is a film composed of a fluorine resin.

17. The method for manufacturing a semiconductor device according to claim 1 , wherein the bump pitch is 40 μm or less.