Semiconductor device

1. A semiconductor device,

said semiconductor device carrying a semiconductor component on a substrate and having an underfill resin applied in a gap between said substrate and said semiconductor component;

said semiconductor device comprising:

a lyophilic area in a portion of a region of one or both of said substrate and said semiconductor component which is in contact with said underfill resin; said lyophilic area being processed to exhibit lyophilicity with respect at least to said liquid underfill resin in comparison with an ambient region of said lyophilic area.

2. The semiconductor device according to claim 1 , wherein

said lyophilic area is processed so as to have a contact angle smaller than that of said ambient region of said lyophilic area.

3. The semiconductor device according to claim 1 , wherein

said ambient region of said lyophilic area is more lyophobic at least to the liquid underfill resin than said lyophilic area.

4. The semiconductor device according to claim 1 , wherein

said ambient region of said lyophilic area is coated with a solder resist; and wherein

a film of titanium oxide lyophilic-processed by exposure to ultraviolet light is formed on a solder resist in said lyophilic area.

5. The semiconductor device according to claim 1 , wherein

said ambient region of said lyophilic area is coated with a solder resist; and wherein

in said lyophilic area, the surface of said solder resist is modified by ion irradiation.

6. The semiconductor device according to claim 1 , wherein

said lyophilic area is arranged at a center part of the area where at least said semiconductor component is mounted.

7. The semiconductor device according to claim 1 , wherein

said lyophilic area includes one or more guide paths extended from a mid part of an area where said semiconductor component is mounted.