NOVELTY - Electrophoretic particle (95) comprises a mother particle, and a covering layer which covers at least a part of the mother particle. The covering layer includes a set of polymers including a polymerization initiator. The polymerization initiator includes a polymerization initiation group linked to a surface of the mother particle and polymerization parts. Each of the polymers includes the polymerization initiator, a first polymerization part, and a second polymerization part and is linked to each other at the cross-linking groups of the first polymerization parts via a cross-linking agent.    USE - The electrophoretic particle is useful in electrophoretic dispersed liquid used in an electrophoretic sheet of an electrophoretic apparatus in an electronic equipment (all claimed) such as TV, a viewfinder type or monitor-direct-view type video tape recorder, a car navigation apparatus, a pager, a personal digital assistance, an electronic calculator, an electronic newspaper, a word processor, a personal computer, a work station, a video phone, a point of sale terminal, and a device with a touch panel, where the electrophoretic particle is positive or negative electrophoretic particle, and the electrophoretic apparatus is a electrophoretic display apparatus.    DETAILED DESCRIPTION - Electrophoretic particle comprises a mother particle, and a covering layer which covers at least a part of the mother particle. The covering layer includes a set of polymers including a polymerization initiator. The polymerization initiator includes a polymerization initiation group linked to a surface of the mother particle and polymerization parts in which monomers are polymerized in living radical polymerization from the polymerization initiation group as a starting point. Each of the polymers includes the polymerization initiator, a first polymerization part, which is coupled to the polymerization initiator, in which first monomers that include monomers with cross-linking groups are polymerized in living radical polymerization, and a second polymerization part, which is coupled to the first polymerization part, in which second monomers that does not include monomers with cross-linking groups are polymerized in living radical polymerization. The polymers are linked to each other at the cross-linking groups of the first polymerization parts via cross-linking agent. INDEPENDENT CLAIMS are included for:    (1) manufacturing the electrophoretic particle, comprising preparing the mother particle and linking a set of polymerization initiators with polymerization initiation groups to a surface of the mother particle in a first process, and polymerizing first monomers with cross-linking groups in living radical polymerization from the polymerization initiation groups as starting points, polymerizing second monomers with no cross-linking groups in living radical polymerization, coupling the cross-linking groups via cross-linking agent, and forming polymerization parts configured by first polymerization parts and second polymerization parts to obtain a set of polymers in a second process; and    (2) an electrophoretic sheet (921) comprising a substrate (912), and a set of constituents which are arranged above the substrate to respectively accommodate the electrophoretic dispersed liquid.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic vertical cross-sectional view of an electrophoretic display apparatus.    Electrophoretic particle (95)    Electrophoretic dispersed liquid (910)    Substrate (912)    Electrophoretic display sheet (921)    Dividing wall. (940)