The real space self-consistent field theory was applied to investigate microstructures and transformation of linear triblock copolymer films induced by surface field.We choose symmetric composition of copolymers fA: fB:fC=0.2:0.6:0.2 and the incompatibility degrees of copolymers are set as AB=AC=BC=30.The thickness of films is set to be 4.5Rg or 9Rg in our simulation.In order to obtain a series of novel microstructures under the above two different thicknesses of films

we study two kinds of thin films with non-modified stripes and modified stripes.And in the process of simulation

we can adjust the surface field strength of the thin films regularly.The strongest surface field strength is set equal to the interaction between copolymers (iWN=30

iA

B

C).The surface interaction is increased from the weakest surface interaction (iWN=5) in turn to the strongest surface field strength

and the gap of adjacent two kinds surface field strength is set as iWN=5.Depending on changing these parameters of simulation

we have obtained a wealth of microstructures.The microstructures show that the copolymers tend to form a regular and ordered lamellar or perforated layer confined thin films with non-modified stripes

while in the case of films with modified stripes

the copolymers tends to self assemble into horizontal structures in their respective modified stripe areas.