Samsung Electronics Co., Ltd.

Young-sub Shin

Hee-Won Jung

Jong-moon Eun

Gi-bum Kim

Ju-heon Yoon

Jae-in Sim

Ha-yeong Son

Do-kwan Lee

A semiconductor light-emitting device includes a light-emitting structure, a reflective electrode layer, and a transparent cover layer. The light-emitting structure includes a first semiconductor layer, an active layer, and a second semiconductor layer. The reflective electrode layer covers an upper surface of the second semiconductor layer. The transparent cover layer covers an upper surface of the second semiconductor layer on the reflective electrode layer. The transparent cover layer includes a tail portion including a first portion and a second portion. The first portion covers an edge of the reflective electrode layer and a convex upper surface. The second portion is thinner than and extends from the first portion.

Semiconductor light-emitting device having a transparent cover layer tail portion

Disclosed is a charging roller for an image forming apparatus capable of preventing the formations of surface scratches. The charging roller includes a roller shaft, a roller body formed on the roller shaft and a scratch prevention layer formed on the roller body. The scratch prevention layer contains inorganic crystal of polysilicate.

Charging roller for image forming apparatus and manufacturing method thereof

Growing community of inventors

Hwaseong-si, South Korea

Young-sub Shin