Sk Telecom Company, Ltd.

Samsung Electronics Co., Ltd.

Young-Tae Noh

Jae-Young Park

Hee-Hyuk Ham

Ki-Moon Kim

Sang-Yoen Lee

Yun-Jung Na

Eun-Joon Park

A photoresist resin composition comprises about 10 to about 35% by weight of an acryl-based copolymer, about 5 to about 10% by weight of a quinone diazide compound, about 55 to about 80% by weight of a solvent, and about 0.01 to about 0.5% by weight of a silane-based surfactant where the weights of each of the acryl-based copolymer, quinone diazide compound, solvent, and silane-based surfactant are based on the total weight of acryl-based copolymer, quinone diazide compound, solvent, and silane-based surfactant. An overcoating layer formed using the photoresist resin composition has improved flatness, and thus defects on a display screen may be prevented and/or reduced.

Photoresist resin composition, method of forming a photoresist pattern, and method of manufacturing a display substrate using the same

Disclosed herein is a method and apparatus for managing ring-back sounds in a subscriber-based ring-back sound service. The method includes the first step of storing common ring-back sounds and reporting details of use of the common ring-back sounds, the second step of storing individual ring-back sounds and reporting details of use of the individual ring-back sounds, and the third step of statistically compiling the reported details of use and determining whether to maintain storage of the ring-back sounds based up the statistically complied details. A method and apparatus for presenting and changing ring-back sounds based upon the ring-back sound managing method and apparatus are provided.

Method and apparatus for managing presenting and changing ring-back sounds in subscriber-based ring-back sound service

A method for controlling routing information for intellectual peripherals (IPs) in a subscriber-based ring-back-tone service. The routing information to be routed to IPs () corresponding to subscribers is classified on a subscriber telephone number-by-number basis, a subscriber telephone office number-by-number basis, a subscriber telephone office number group-by-group basis or a subscriber's major activity area-by-area basis according to a selection. The classified routing information is set and registered in a home location register (HLR) (). When the HLR () receives a location registration request message from a terminal of an arbitrary subscriber, a corresponding routing information item to be routed to an IP () corresponding to the subscriber's terminal among the classified, set and registered routing information is contained within a response message to the location registration request message, and the response message is provided to a terminating mobile switching center (T MSC) ().

Method for controlling routing information for intellectual peripherals in subscriber-based ring-back-tone-service

The present invention relates to a method of managing a trunk, and querying and ascertaining a ring-back sound to provide the ring-back sound in a subscriber-based ring-back sound service. In the trunk management method, a terminating mobile switching center () requests the intelligent peripheral () to release a trunk call when the terminating mobile switching center recognizes the answer of the terminating subscriber or when a first predetermined period of time has elapsed from a time when it is recognized that a corresponding ring-back sound is provided to the originator. Further, the intelligent peripheral () requests the terminating mobile switching center () to release the trunk call when a second predetermined period of time has elapsed from a time when the ring-back sound is provided.

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Seoul, South Korea

Young-Tae Noh