Patent ID: 8409910
Filing Date: 2013-04-02
Classification: B82Y,C09D,H01L,Y02E,Y02P

Abstract:
1. A method for making an optical sensor in which a first fine particle layer composed of n-type semiconductor fine particles coated with a coating film composed of a second film compound having a second functional group and a second bonding group at respective two ends of the molecule is bonded and fixed on a pattern portion of a surface of a substrate coated with a coating film composed of a first film compound having a first functional group and a first bonding group at respective two ends of the molecule and in which a second fine particle layer composed of p-type semiconductor fine particles coated with a coating film composed of a third film compound having a third functional group and a third bonding group at respective two ends of the molecule is bonded and fixed on the first fine particle layer, the method comprising: bringing a solution comprising the first film compound into contact with a surface of a substrate so as to form a coated substrate; irradiating the coated substrate with an energy beam through a mask that covers a pattern portion so as to allow the coating film composed of the first film compound to remain on the pattern portion; bringing a solution comprising the second film compound into contact with the n-type semiconductor fine particles so as to form coated n-type semiconductor fine particles; bringing a solution comprising the third film compound into contact with the p-type semiconductor fine particles so as to form coated p-type semiconductor fine particles; bringing a first coupling agent into contact with one of the coated substrate and the coated n-type semiconductor fine particles so as to fix the first coupling agent to the one of the coated substrate and the coated n-type semiconductor fine particles and thereafter bringing the first coupling agent into contact with the other of the coated substrate and the coated n-type semiconductor fine particles so as to fix and bond one n-type semiconductor fine particle layer composed of the coated n-type semiconductor fine particles on the surface of the coated substrate; removing the coated n-type semiconductor fine particles that remain unfixed on the surface of the coated substrate; bringing a second coupling agent into contact with one of the n-type semiconductor fine particle layer and the coated p-type semiconductor fine particles so as to fix the second coupling agent to the one of the n-type semiconductor fine particles and the coated p-type semiconductor fine particles and thereafter bringing the second coupling agent into contact with the other of the n-type semiconductor fine particle layer and the coated p-type semiconductor fine particles so as to fix and bond one p-type semiconductor fine particle layer composed of the coated p-type semiconductor fine particles on the n-type semiconductor fine particle layer; and removing the coated p-type semiconductor fine particles that remain unfixed on the surface of the n-type semiconductor fine particle layer.