Patent ID: 9018042
Filing Date: 2015-04-28
Classification: H01L

Abstract:
1. A method for fabricating a chip having a water-repellent obverse surface and a hydrophilic reverse surface, the method comprising: (a) preparing a first substrate comprising the chip on the reverse surface thereof through a wax film; wherein the chip comprises an obverse surface and a reverse surface; the obverse surface of the chip is in contact with the wax film the reverse surface of the chip is hydrophilic; (b) bringing the reverse surface of the chip into contact with a second substrate having a water film on the obverse surface thereof to obtain a laminate composed of the first substrate and the second substrate; wherein the reverse surface of the chip is brought into contact with the water film; (c) immersing the laminate in a first hydrophobic solvent to dissolve the wax film in the first hydrophobic solvent; (d) removing the first substrate to obtain the second substrate where the chip is attached on the obverse surface thereof; wherein the reverse surface of the chip is in contact with the water film; and the obverse surface of the chip is exposed; (e) bringing the obverse surface of the chip having a hydroxyl group into contact with an organic solvent in which R R R Y represents halogen; and (f) removing the second substrate to obtain the chip having the water-repellent obverse surface and the hydrophilic reverse surface.